RE: problems compiling and using mod_jk

[Ben Ricker]

Anything in the mod_jk.log, or whatever log you setup in the httpd.conf
or mod_jk.conf file?

Ben Ricker

On Wed, 2003-02-26 at 13:59, Mike Jackson wrote:
> Hmm, I'm still having problems.  I took my mod_jk.conf from tomcat 3 and
> striped out everything except for the examples webapp and put in the minimal
> workers.properties file from the web site.  I can access the nbrguess.jsp
> file from tomcat if I go to 8080, but when I try to get to it via apache it
> gives me a error.  There's nothing in the log file to point me anywhere, it
> looks like things on the tomcat side are running, I've got startup messages
> from apj13 threads, but I don't seem to be talking to them.  Any ideas?
> 
> --mikej
> -=-
> mike jackson
> [EMAIL PROTECTED]
> 
> > -Original Message-
> > From: Turner, John [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, February 26, 2003 11:55 AM
> > To: 'Tomcat Users List'
> > Subject: RE: problems compiling and using mod_jk
> >
> >
> >
> > Yup.
> >
> > John
> >
> >
> > > -Original Message-
> > > From: Mike Jackson [mailto:[EMAIL PROTECTED]
> > > Sent: Wednesday, February 26, 2003 2:53 PM
> > > To: Tomcat Users List
> > > Subject: RE: problems compiling and using mod_jk
> > >
> > >
> > > You mean the JMX MBeans lines?
> > >
> > > --mikej
> > > -=-
> > > mike jackson
> > > [EMAIL PROTECTED]
> > >
> > > > -Original Message-
> > > > From: Turner, John [mailto:[EMAIL PROTECTED]
> > > > Sent: Wednesday, February 26, 2003 11:45 AM
> > > > To: 'Tomcat Users List'
> > > > Subject: RE: problems compiling and using mod_jk
> > > >
> > > >
> > > >
> > > > Just comment out the ManagedBean elements in server.xml.  That
> > > > will get rid
> > > > of those error messages, they are not compatible with
> > > Ajp13Connector.
> > > >
> > > > John
> > > >
> > > >
> > > > > -Original Message-
> > > > > From: Mike Jackson [mailto:[EMAIL PROTECTED]
> > > > > Sent: Wednesday, February 26, 2003 2:40 PM
> > > > > To: Tomcat Users List
> > > > > Subject: RE: problems compiling and using mod_jk
> > > > >
> > > > >
> > > > > Ok, I've got mod_jk to compile and work with apache 1.3.27
> > > > > and tomcat 3.3.x.
> > > > > However I can't get it to work with tomcat 4.1.18.  The
> > > > > module loads, but it
> > > > > doesn't seem like it can talk to tomcat.  I tried to change
> > > > > the server.xml
> > > > > file to use the older apj13 connector, but it fails to
> > > load, gets a
> > > > > java.lang.Exception: ManagedBean is not found with Ajp13Connector.
> > > > >
> > > > > So my question is, where to go, should I switch back to the
> > > > > coyote connector
> > > > > and try to get it working?  Or is there something I can
> > > do to fix that
> > > > > ManagedBean exception?
> > > > >
> > > > > --mikej
> > > > > -=-
> > > > > mike jackson
> > > > > [EMAIL PROTECTED]
> > > > >
> > > > > > -Original Message-
> > > > > > From: Turner, John [mailto:[EMAIL PROTECTED]
> > > > > > Sent: Wednesday, February 26, 2003 11:04 AM
> > > > > > To: 'Tomcat Users List'
> > > > > > Subject: RE: problems compiling and using mod_jk
> > > > > >
> > > > > >
> > > > > >
> > > > > > Sounds good to me, I really have no idea.  My experience with
> > > > > > build tools is
> > > > > > pretty minimal.
> > > > > >
> > > > > > John
> > > > > >
> > > > > > > -Original Message-
> > > > > > > From: Mike Jackson [mailto:[EMAIL PROTECTED]
> > > > > > > Sent: Wednesday, February 26, 2003 2:02 PM
> > > > > > > To: Tomcat Users List
> > > > > > > Subject: RE: problems compiling and using mod_jk
> > > > > > >
> > > > > > >
> > > > > > > I found an install-sh in
> > > > > >

Re: No processor available

[Ben Ricker]

On Thu, 2003-02-27 at 12:53, Sankaranarayanan (Ganesh) Ganapathy wrote:
> Hi All,
> 
> Currently I see that tomcat rejects requests with the message "No processor 
> available" if it has reached the maximum number of processors and the processors are 
> busy processing requests.
> 
> Is there a way to make tomcat wait until a processor becomes available?
> 
> Thanx
> Ganesh

Change the "Accept Count" property in the server.xml in the connector
properties.


Ben Ricker

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RE: [BULK] - Re: No processor available

[Ben Ricker]

On Thu, 2003-02-27 at 13:37, Sankaranarayanan (Ganesh) Ganapathy wrote:
> How does the accept count property affect this? The accept count property merely 
> determines the number of connections that will be queued on the socked. I am talking 
> about a case where the connection is accepted from server socket but there is no 
> processor available to process the request.
> Thanx
> Ganesh

The following information is taken from Tomcat's 4.1.18 documentation. 
If you have the documentation installed somewhere, the URL is:

http://localhost/tomcat-docs/config/jk.html
 
"acceptCount:
 
The maximum queue length for incoming connection requests when all
possible request processing threads are in use. Any requests received
when the queue is full will be refused. The default value is 10."

If I understand you, this is exactly what you are looking for?

Ben Ricker

> -----Original Message-
> From: Ben Ricker [mailto:[EMAIL PROTECTED]
> Sent: Thursday, February 27, 2003 11:07 AM
> To: Tomcat Users List
> Subject: [BULK] - Re: No processor available
> 
> 
> On Thu, 2003-02-27 at 12:53, Sankaranarayanan (Ganesh) Ganapathy wrote:
> > Hi All,
> > 
> > Currently I see that tomcat rejects requests with the message "No processor 
> > available" if it has reached the maximum number of processors and the processors 
> > are busy processing requests.
> > 
> > Is there a way to make tomcat wait until a processor becomes available?
> > 
> > Thanx
> > Ganesh
> 
> Change the "Accept Count" property in the server.xml in the connector
> properties.
> 
> 
> Ben Ricker
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Re: Tomcat application redeploy behind Apache server

[Ben Ricker]

On Tue, 2003-03-04 at 09:43, Jim Cobban wrote:
> I am sorry to keep harping on this, but I still am no closer to solving my
> problem.  I don't even know where to look for a solution.

Are you sure you are not caching the web pages? Do you have caching on
in the httpd.conf? Do you send the "pragma-nocache" in your HTML? Try
changing the browser settings to always go back to the server and if you
still get the old page, then look to see if Apache has caching on.

I noticed that you are using mod_webapp. you might want to try to switch
to mod_jk instead. It works with one Tomcat only; I have heard that it
is a good idea to remobe the load-balancing weight when only using one
tomcat. The, you should be able to use the manager app.

HTH,

Ben Ricker

> >
> > - Original Message -
> > From: "Jim Cobban" <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Saturday, February 22, 2003 1:29 PM
> > Subject: Re: [EMAIL PROTECTED] Tomcat application redeploy behind Apache
> server
> >
> > I have a problem that when I redeploy my JSP/servlet application on a
> Tomcat
> > server, the new behavior is not visible to users who access the
> applications
> > through an Apache HTTP server which is the front-end.  The new behavior is
> > seen if I go into the backdoor directly into the Tomcat server, but that
> > access is not available to my customers.  As a result I have to shutdown
> the
> > connector and the Tomcat server and restart in order for my customers to
> see
> > the new behavior.  How do I configure Apache and Tomcat so that
> redeploying
> > the application using the manager interface on Tomcat causes the new
> > functionality to be visible through Apache.
> >
> > The Apache httpd.conf file contains the following:
> >
> > LoadModule webapp_module modules/mod_webapp.so
> >
> > 
> > WebAppConnection warpConnection warp 127.0.0.1:8008
> > WebAppDeploy examples warpConnection /examples/
> > WebAppInfo /webapp-info
> > 
> >
> > WebAppDeploy cocoon warpConnection /cocoon/
> > WebAppDeploy Census warpConnection /Census/
> > WebAppDeploy Ocfa warpConnection /Ocfa/
> > WebAppDeploy manager warpConnection /manager/
> >
> > The Tomcat server.xml contains the following:
> >
> >  >port="8009" minProcessors="5" maxProcessors="75"
> >acceptCount="10" debug="0"/>
> >
> >
> >
> 
> 
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Re: Problems configuring Tomcat with Apache using mod_jk2

[Ben Ricker]

You need to JkMount the /examples in httpd.conf. Something like "JkMount
*/examples blah" where "blah" is the name of your loadbalancer setup in
workers.properties.

It would help if you post the entries you added in httpd.conf for
Tomcat. Also include your server.xml file for more information.

Ben Ricker

On Tue, 2003-03-04 at 10:36, David Godfrey wrote:
> Hi,
> 
> I'm having problems when trying to use Tomcat and Apache HTTP server
> together, with mod_jk2. I have built Apache from the source, installed
> Tomcat 4.1.18, and tested each individually (they seem to function
> correctly). When I add in mod_jk2, both Apache and Tomcat still start and
> function correctly, but there does not appear to be any redirection taking
> place, (I can access http://localhost:8080/examples for, but not
> http://localhost/examples). 
> 
> When I examine "error_log" in APACHE_HOME/logs, there are the following 2
> entries, but nothing that (to me) indicates an error:  
> 
>   Apache/2.0.43 (Unix) mod_jk/1.2.1 configured -- resuming normal
> operations
> 
>   File does not exist: /opt/apache/htdocs/examples
> 
> The error/log file I have defined in httpd.conf for mod_jk2 is created when
> I start Apache / Tomcat, but is empty. I am running Solaris 2.8, Apache
> 2.0.43, Tomcat 4.1.18, and Java 1.4.1.
> 
> I would really appreciate some ideas on how I could solve this problem.
> 
> Many thanks,
> 
> D
> 
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Re: Problems configuring Tomcat with Apache using mod_jk2

[Ben Ricker]

On Tue, 2003-03-04 at 10:36, Ben Ricker wrote:
> You need to JkMount the /examples in httpd.conf. Something like "JkMount
> */examples blah" where "blah" is the name of your loadbalancer setup in
> workers.properties.

Let me correct that: it should be '/examples/* blah'. I was looking at
two different entries in my own httpd.conf.

Ben Ricker

> It would help if you post the entries you added in httpd.conf for
> Tomcat. Also include your server.xml file for more information.
> 
> Ben Ricker
> 
> On Tue, 2003-03-04 at 10:36, David Godfrey wrote:
> > Hi,
> > 
> > I'm having problems when trying to use Tomcat and Apache HTTP server
> > together, with mod_jk2. I have built Apache from the source, installed
> > Tomcat 4.1.18, and tested each individually (they seem to function
> > correctly). When I add in mod_jk2, both Apache and Tomcat still start and
> > function correctly, but there does not appear to be any redirection taking
> > place, (I can access http://localhost:8080/examples for, but not
> > http://localhost/examples). 
> > 
> > When I examine "error_log" in APACHE_HOME/logs, there are the following 2
> > entries, but nothing that (to me) indicates an error:  
> > 
> > Apache/2.0.43 (Unix) mod_jk/1.2.1 configured -- resuming normal
> > operations
> > 
> > File does not exist: /opt/apache/htdocs/examples
> > 
> > The error/log file I have defined in httpd.conf for mod_jk2 is created when
> > I start Apache / Tomcat, but is empty. I am running Solaris 2.8, Apache
> > 2.0.43, Tomcat 4.1.18, and Java 1.4.1.
> > 
> > I would really appreciate some ideas on how I could solve this problem.
> > 
> > Many thanks,
> > 
> > D
> > 
> > -
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RE: Problems configuring Tomcat with Apache using mod_jk2

[Ben Ricker]

On Tue, 2003-03-04 at 11:01, David Godfrey wrote:
> >It would help if you post the entries you added in httpd.conf for Tomcat.
> Also include your server.xml file for more information.
> 
> I have modified httpd.conf as follows:
> 
> JKWorkersFile "/opt/tomcat/conf/jk/workers.properties"
> JKLogFile "/opt/tomcat/logs/mod)jk.log"
> Include /opt/tomcat/conf/auto/mod_jk.conf

Just to be sure, tack on the mod_jk.conf.

It still looks like you have an issue with telling Apache where to go
for /examples and any other webapps (like /manager or /admin). You need
to add the JkMount directives in httpd.conf; they are sort of like
redirects in that they tell Apache to send requests for, say,
/examples/* to the available worker(s).

My entry in httpd.conf for /examples:

JkMount /examples/* loadbalancer

"loadbalancer" is defined in my workers.properties file. For example, I
have the follwoing in my workers.properties:

worker.list=tomcat1,tomcat2,loadbalancer
# 
# First tomcat server
# 
worker.tomcat1.port=11009
worker.tomcat1.host=127.0.0.1
worker.tomcat1.type=ajp13

worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=tomcat1,tomcat2

Ben Ricker

> Server.xml is as follows (standard apart from the references to mod_jk)
> 
> 
>  modJk="/opt/apache/modules/mod_jk-2.0.43.so" />
>debug="0"/>
>className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
> debug="0"/>
>   
> 
>type="org.apache.catalina.UserDatabase"
>description="User database that can be updated and saved">
> 
> 
>   
> factory
> org.apache.catalina.users.MemoryUserDatabaseFactory
>   
>   
> pathname
> conf/tomcat-users.xml
>   
> 
>   
>
> port="8080" minProcessors="5" maxProcessors="75"
>enableLookups="true" redirectPort="8443"
>acceptCount="100" debug="0" connectionTimeout="2"
>useURIValidationHack="false" disableUploadTimeout="true" />
>   
>   unpackWARs="true" autoDeploy="true">
>append="true" forwardAll="false"
> modJk="/opt/apache/modules/mod_jk-2.0.43.so" />
>   directory="logs"  prefix="localhost_log." suffix=".txt"
>   timestamp="true"/>
>   reloadable="true" crossContext="true">
> prefix="localhost_examples_log." suffix=".txt"
> timestamp="true"/>
> home="com.wombat.empl.EmployeeRecordHome"
>remote="com.wombat.empl.EmployeeRecord"/>
>  value="15"/>
> override="false"/>
>type="javax.sql.DataSource"/>
>   
>         usernamesa
> password
> driverClassName
>   org.hsql.jdbcDriver
> url
>   jdbc:HypersonicSQL:database
>   
>type="javax.mail.Session"/>
>   
> 
>   mail.smtp.host
>   localhost
> 
>   
>global="simpleValue"
>     type="java.lang.Integer"/>
> 
>   
> 
>   
> 
> 
> 
> Many thanks,
> 
> David
> 
> 
> 
> 
> 
> -Original Message-
> From: Ben Ricker [mailto:[EMAIL PROTECTED] 
> Sent: 04 March 2003 16:37
> To: '[EMAIL PROTECTED]'
> Subject: Re: Problems configuring Tomcat with Apache using mod_jk2
> 
> 
> You need to JkMount the /examples in httpd.conf. Something like "JkMount
> */examples blah" where "blah" is the name of your loadbalancer setup in
> workers.properties.
> 
> It would help if you post the entries you added in httpd.conf for Tomcat.
> Also include your server.xml file for more information.
> 
> Ben Ricker
> 
> On Tue, 2003-03-04 at 10:36, David Godfrey wrote:
> > Hi,
> > 
> > I'm having problems when trying to use Tomcat and Apache HTTP server 
> > together, with mod_jk2. I have built Apache from the source, installed 
> > Tomcat

Re: How to debug Tomcat 4.0.6 remotely?

[Ben Ricker]

Solaris does not have 'top' installed by default (you can get it from
http://www.sunfreeware.com). Solaris has a similar util called 'prstat'.
Check out 'man prstat'.

Ben Ricker

On Fri, 2003-03-07 at 13:34, Jake Robb wrote:
> I'm not 100% familiar with Solaris, but I think you can do the following:
> 
> 1. set up secure shell (SSH) access on the Solaris box so that you can log
> into it remotely on the network
> 
> 2. download and install PuTTY on your Windows machine (get it from
> www.versiontracker.com)
> 
> 3. Use PuTTY to connect to the Solaris machine remotely.
> 
> 4. Once connected, run "top" from the command prompt.
> 
> "top" will show you a list of running processes.  In Linux, you can then
> interactively have it filter down to a specific user's processes and other
> handy things -- I suspect this functionality is available in Solaris as
> well.  While "top" is running, press "h" for a list of available options.
> 
> Good luck!
> 
> -Jake
> 
> - Original Message -
> From: "Raja Sekhar" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, March 07, 2003 2:13 PM
> Subject: How to debug Tomcat 4.0.6 remotely?
> 
> 
> > HI,
> >
> > Is there any way to monitor the CPU performance of a tomcat 4.0.6 server
> remotely?? I am sitting on a windows box and the tomcat is running on
> Solaris.
> >
> > Can any one please help me asap on this..
> >
> > ..Raj
> >
> >
> > Need a new email address that people can remember
> > Check out the new EudoraMail at
> > http://www.eudoramail.com
> >
> > -
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> >
> 
> 
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Re: Tomcat application redeploy behind Apache server

[Ben Ricker]

On Fri, 2003-03-07 at 15:59, Jim Cobban wrote:


> The problem I was having with the connector was NOT that updated pages were
> not visible after the redeploy with the manager app.  It was only that
> updated classes were not visible.  Indeed I did not even have to redeploy to
> see the updated pages.  All I had to do was issue a reload at my browser and
> the updated page would appear.  So the problem has nothing to do with
> cacheing on Apache.
>
> Still I cannot get the manager application to redeploy.  Except now things
> are worse, since the ability to update the pages without restarting the
> Tomcat server has been lost.
> 
> There must be SOMEONE out there who has gotten this to work.  Please tell me
> what I have to do to get the manager application to work behind Apache.

So you are saying that you cannot go to /manager/reload?path/to/webapp?
Do you get an error on the browser? If not, check the access_log of
Apache and see if you received an error there. If the access_log shows a
"good" return code on the /manager, then check the mod_jk log (wherever
you set it up to be logged) and see if there any errors there. You might
be dealing with an issue where Apache does not recognize that /managers
needs to be redirected to Tomcat. Or, passing that point, it may be that
mod_jk is not able to pass the connection to Tomcat.

Anyway, more info would be needed. One more thing to add: if you can
embed the mod_jk configs you added to httpd.conf and any
workers.properties/mod_jk.properties you setup, I can help you better.

HTH,

Ben Ricker

I cannot really answer your question until I know what exactly is not
working and where it breaks down.

> 
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Re: Tomcat security concerns during start-up

[Ben Ricker]

I do not see this as a problem. You can lock the Tomcat account (do have
to give it a shell, though) and no one should be able to get into the
account. I use 'sudo' to allow others the ability to start and stop
Tomcat which 'su's to the Tomcat user before executing.

I myself use the Tomcat group, of which Tomcat is the only member, and
apply root ownership to everything. You also need to make sure your
WEB-INF is not in your docbase.

HTH,

Ben Ricker

On Tue, 2003-03-11 at 13:20, krip pane wrote:
> All,
> 
> I'm running 4.1.18 on solaris 2.8 - currently without
> any problems as id "tomcat".  But my issue is I've to
> give write permission to tomcat on the conf directory
> inorder for tomcat to start successfully. Is there any
> other way of starting tomcat without giving this
> permission, is this a bug?, has it been addresses in a
> different release.
> 
> Thanks
> 
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Re: Increase heap for a specific webapplication

[Ben Ricker]

Are you running each in separate Tomcats? If you ran one app in one
Tomcat and the other on another Tomcat, you could control the heap
individually as well as using nice to control CPU usage.

Ben Ricker

On Thu, 2003-03-13 at 10:17, Raja Sekhar wrote:
> Hi,
> 
> I have two web applications running in my Tomcat 4.0.6. One application is data 
> centric and heavily loaded and other is very light with hardly any users hitting. 
> Now what I observe is sometimes if there is a heavy search made on the first 
> system... it basically stops responding. I cant send any further requests till 
> restart. But if I hit the second webapp, it still keeps responding.
> 
> So what I feel is tomcat is internally dividing the heap and virtual memory for all 
> the webapps equally.. Is there anyway I can alter this heap for each webapp 
> separately??
> 
> Or please let me know any other alternative for this problem asap because this is a 
> production problem.
> 
> Thanks & Regards,
> 
> ..Raj
> 
> 
> Need a new email address that people can remember
> Check out the new EudoraMail at
> http://www.eudoramail.com
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Re: Load balancing and Sticky sessions

[Ben Ricker]

Unless you have session replication going on between the two Tomcats (or
are running Tomcat 5...doubtful since it is in its infant stages), you
will always lose your session if you get sent from one Tomcat to
another.

Ben Ricker


On Thu, 2003-03-20 at 12:09, Kavitha ranga wrote:
> Hello,
>I have Apache and 2 tomcats running on 2 separate servers which are in a 
> cluster. I am running Tomcat 4.0(using ajp13) via mod_jk. I am also using 
> load balancing.I am losing my session variables when there is a switch 
> between the 2 tomcats. Any help is greatly appreciated.
> 
> thanks in advance,
> Kavitha
> 
> 
> 
> 
> 
> _
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Re: Connection drops with tomcat-based game server (very shortversion)

[Ben Ricker]

Sounds like a load issue coupled with a config issue. How about some
logs entries? DO you see anything in the logs you setup? Catalina.out?
Context log?

Also, some idea what OS and version would also be helpful. It is nearly
impossible to tell (at least for me).

Ben Ricker

On Fri, 2003-03-21 at 13:01, Wouter Bijlsma wrote:
> Is it possible that tomcat sometimes randomly kills a request, does not process a 
> request or queues a request indefinitely, thereby blocking a client that tries to 
> read back the response to its request? Could this be possible when a servlet 
> communicates with the clients using only raw data and InputStreams/OutputStreams? 
> And: is it a good idea to develop a game server for playing games like chess, 
> chequers or draughts with tomcat, considering the fact that tomcats main purpose is 
> to act as web application server using a strict request-response paradigm. Is it 
> safe to assume that every request made by a client always yields a proper response, 
> also when using raw data transfers? Also when there's a really high volume of 
> requests to a single servlet?
> 
> Don't get me wrong: I do *not* think there's something wrong with tomcat! As a 
> matter of fact I have really good experiences with it using it for web applications!!
> 
> Kind Regards,
> 
>   Wouter Bijlsma,
>   [EMAIL PROTECTED]
> 
> 
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Re: Connection drops with tomcat-based game server (very shortversion)

[Ben Ricker]

One other suggestion: You might try putting Apache in front of the
Tomcat to see if it still drops the connections. If the behavior stops,
it might be something in the httpd connector. If the behavior persists,
then I would look at the app or, more likely, the other "network" access
(is there firewalls? VPN? some weird network setup?).

Ben

On Fri, 2003-03-21 at 13:51, Wouter Bijlsma wrote:
> There's nothing in the logfiles (we are only using catalina.out) that would suggest 
> that Tomcat even knows about a connection problem. The server just goes on as if 
> nothing happened, but the messages it sends to the 'dead client' are never 
> delivered. This might indeed be a load/config issue, although some users experienced 
> the problem even when only 3 users were logged in. The confusing part is that we 
> just cannot reproduce the bug on a fast network (not even with 15 users logged in), 
> while neither the client nor the server use time-sensitive code for sending or 
> receiving messages.
> 
> We are using tomcat 4.0.6 on a Debian/testing linux machine, kernel version 2.4.20
> 
> Wouter Bijlsma
> 
> On 21 Mar 2003 13:16:19 -0600
> Ben Ricker <[EMAIL PROTECTED]> wrote:
> 
> > Sounds like a load issue coupled with a config issue. How about some
> > logs entries? DO you see anything in the logs you setup? Catalina.out?
> > Context log?
> > 
> > Also, some idea what OS and version would also be helpful. It is nearly
> > impossible to tell (at least for me).
> > 
> > Ben Ricker
> > 
> > On Fri, 2003-03-21 at 13:01, Wouter Bijlsma wrote:
> > > Is it possible that tomcat sometimes randomly kills a request, does
> > > not process a request or queues a request indefinitely, thereby
> > > blocking a client that tries to read back the response to its request?
> > > Could this be possible when a servlet communicates with the clients
> > > using only raw data and InputStreams/OutputStreams? And: is it a good
> > > idea to develop a game server for playing games like chess, chequers
> > > or draughts with tomcat, considering the fact that tomcats main
> > > purpose is to act as web application server using a strict
> > > request-response paradigm. Is it safe to assume that every request
> > > made by a client always yields a proper response, also when using raw
> > > data transfers? Also when there's a really high volume of requests to
> > > a single servlet?
> > > 
> > > Don't get me wrong: I do *not* think there's something wrong with
> > > tomcat! As a matter of fact I have really good experiences with it
> > > using it for web applications!!
> > > 
> > > Kind Regards,
> > > 
> > >   Wouter Bijlsma,
> > >   [EMAIL PROTECTED]
> > > 
> > > 
> > > -
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > -- 
> > Ben Ricker <[EMAIL PROTECTED]>
> > Wellinx.com
> > 
> > 
> > -
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> > 
> > 
> > 
> 
> 
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Re: clustering

[Ben Ricker]

You seem to be confused (or maybe it is me). You are not doing
clustering. You are trying to do session replication across Tomcats. If
you are not using something like Apache in the front, how will the user
ever know to switch from 8000 to 8001? They will never know.

Clustering is a totally different thing where you utilize special
hardware and software to slave multiple servers into one virtual server
which share processing among the CPUs on the servers. it is basically
Multi-Processing across servers.


Ben Ricker
Wellinx.com

On Thu, 2003-06-05 at 13:11, Alkesh Badshah wrote:
> I'm trying to run multiple instances of tomcat on a single machine listening on 
> different ports. Something to the effect of:
> 
> http://localhost:8000
> http://localhost:8001
> 
> I've modified the server.xml file, placed the javagroups.jar and 
> tomcat-javagroups.jar in the server/lib directory, and implement 
> java.io.serializable.
> 
> Unfortunately, its not working as I hoped. Once I have a logged in session, I'm 
> hoping to be able to simply switch port(8000 <-> 8001) and have it be seemless to 
> the user. Any idea on what the problem could be?
> 
> AB


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RE: clustering

[Ben Ricker]

I knew that, but the original message was so ambiguous about what
exactly they were running, I thought a little clarity of terminology
would help; blame my philosophy degree *grin*. I did not mean it in a
condescending way.

Ben Ricker
Wellinx.com

On Fri, 2003-06-06 at 16:17, Filip Hanik wrote:
> you are correct of course with the terminology,
> how ever in the lazy days of today's IT, you say that you cluster your
> tomcat servers when you enable session replication.
> 
> :)
> 
> Filip
> 
> > -----Original Message-
> > From: Ben Ricker [mailto:[EMAIL PROTECTED]
> > Sent: Friday, June 06, 2003 11:00 AM
> > To: Tomcat Users List
> > Subject: Re: clustering
> >
> >
> > You seem to be confused (or maybe it is me). You are not doing
> > clustering. You are trying to do session replication across Tomcats. If
> > you are not using something like Apache in the front, how will the user
> > ever know to switch from 8000 to 8001? They will never know.
> >
> > Clustering is a totally different thing where you utilize special
> > hardware and software to slave multiple servers into one virtual server
> > which share processing among the CPUs on the servers. it is basically
> > Multi-Processing across servers.
> >
> >
> > Ben Ricker
> > Wellinx.com
> >
> > On Thu, 2003-06-05 at 13:11, Alkesh Badshah wrote:
> > > I'm trying to run multiple instances of tomcat on a single
> > machine listening on different ports. Something to the effect of:
> > >
> > > http://localhost:8000
> > > http://localhost:8001
> > >
> > > I've modified the server.xml file, placed the javagroups.jar
> > and tomcat-javagroups.jar in the server/lib directory, and
> > implement java.io.serializable.
> > >
> > > Unfortunately, its not working as I hoped. Once I have a logged
> > in session, I'm hoping to be able to simply switch port(8000 <->
> > 8001) and have it be seemless to the user. Any idea on what the
> > problem could be?
> > >
> > > AB
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
> 
> 
> -
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RE: rotating catalina.out

[Ben Ricker]

I use logrotate to rotate catalina.out. You need to restart Tomcat to do
this, but I do it in a maintenance window.

Ben Ricker
Wellinx.com

On Thu, 2003-06-12 at 15:54, Filip Hanik wrote:
> log4j works for your own code, but if you are a sysadmin, and need to rotate
> catalina.out (which is essentially System.out) then you are toast :-)
> 
> I am gonna ask the developers to switch to log4j instead of System.out, they
> might give me the finger :)
> 
> filip
> 
> > -Original Message-
> > From: Shapira, Yoav [mailto:[EMAIL PROTECTED]
> > Sent: Thursday, June 12, 2003 1:27 PM
> > To: Tomcat Users List
> > Subject: RE: rotating catalina.out
> >
> >
> >
> > Howdy,
> > It seems you're right -- I hadn't looked at the code for a while.
> >
> > This is why I suggested tomcat use the log4j file rollover mechanism,
> > which is very robust.  But I didn't get much positive feedback, and I
> > certainly don't have the bandwidth to do it myself right now...
> >
> > Yoav Shapira
> > Millennium ChemInformatics
> >
> >
> > >-Original Message-
> > >From: Filip Hanik [mailto:[EMAIL PROTECTED]
> > >Sent: Thursday, June 12, 2003 4:24 PM
> > >To: Tomcat Users List
> > >Subject: RE: rotating catalina.out
> > >
> > >what mechanism is that?
> > >
> > >It looks like the logs are being held by an open file descriptor, so
> > >rotating the catalina.out will just stop logging after the first
> > rotation,
> > >since you cause an IOException in Tomcat.
> > >
> > >filip
> > >
> > >> -Original Message-
> > >> From: Shapira, Yoav [mailto:[EMAIL PROTECTED]
> > >> Sent: Thursday, June 12, 2003 1:12 PM
> > >> To: Tomcat Users List
> > >> Subject: RE: rotating catalina.out
> > >>
> > >>
> > >>
> > >> Howdy,
> > >> Why not use the nightly rollover mechanism used for servlet logs,
> > >> localhost logs, etc. also for catalina.out?
> > >>
> > >> Yoav Shapira
> > >> Millennium ChemInformatics
> > >>
> > >>
> > >> >-Original Message-
> > >> >From: Eric J. Pinnell [mailto:[EMAIL PROTECTED]
> > >> >Sent: Thursday, June 12, 2003 4:04 PM
> > >> >To: Tomcat Users List
> > >> >Subject: Re: rotating catalina.out
> > >> >
> > >> >I was going to experiment with it next week.  It would be nice to do
> > it
> > >> >within Tomcat and stay away from the Unix-y stuff.  That way it
> > would
> > >> also
> > >> >work for the windows users.
> > >> >
> > >> >I have a feeling the Unix-y stuff will have to suffice for a bit.
> > >> >
> > >> >-e
> > >> >
> > >> >On Thu, 12 Jun 2003, Filip Hanik wrote:
> > >> >
> > >> >> did anyone figure out how to rotate this bad boy and the
> > >> localhost_log
> > >> >> without shutting down tomcat?
> > >> >>
> > >> >> Filip
> > >> >>
> > >> >>
> > >> >>
> > -
> > >> >> To unsubscribe, e-mail: [EMAIL PROTECTED]
> > >> >> For additional commands, e-mail:
> > [EMAIL PROTECTED]
> > >> >>
> > >> >>
> > >> >
> > >>
> > >-
> > >> >To unsubscribe, e-mail: [EMAIL PROTECTED]
> > >> >For additional commands, e-mail: [EMAIL PROTECTED]
> > >>
> > >>
> > >>
> > >>
> > >> This e-mail, including any attachments, is a confidential
> > >> business communication, and may contain information that is
> > >> confidential, proprietary and/or privileged.  This e-mail is
> > >> intended only for the individual(s) to whom it is addressed, and
> > >> may not be saved, copied, printed, disclosed or used by anyone
> > >> else.  If you are not the(an) intended recipient, please
> > >> immediately delete this e-mail from your computer system and
> > >> notify the sender.  Thank you.
> > >>
> > >>
> > >> ---

Re: Screen refresh

[Ben Ricker]

On Mon, 2003-06-16 at 16:30, Jason Bainbridge wrote:
> On Tue, 17 Jun 2003 05:18, Mike Curwen wrote:
> > Use of META refresh tags ?
> > 
> > 
> >  > content="N;URL=http://www.yoursite.com/login_expired";>
> > 
> 
> Either that or update the session-timeout in your web.xml to a more acceptable 
> value

For security reasons, you may want a user to time out in a short time.
If they leave a window open to a bank statememnt, say, you want the time
out to invalidate the session so that another person cannot come back
and continue the session without authentication. For this, the web.xml
change is the only way to go. Refreshes will mean never ending sessions.

Of course, you may be perfectly happy with never ending sessions. 

Ben Ricker
Wellinx.com



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RE: Load balancing

[Ben Ricker]

On Fri, 2003-06-20 at 09:52, Roberts, Eric wrote:
> Hi,
> 
> Can you use the jvmRoute parameter?

The above might work; I have not tried it.

One thing I did was to turn on the Tomcat web listener and then I can
directly access each Tomcat instance by port (Tomcat1 on Server 1 is
port 8081 and Tomcat2 on Server2 is port 8082, etc).

Ben Ricker
Wellinx.com

> -Original Message-
> From: Pierre Maris [mailto:[EMAIL PROTECTED]
> Sent: 20 June 2003 16:38
> To: [EMAIL PROTECTED]
> Subject: Load balancing
> 
> 
> Hi,
> 
>  
> 
> I am working with a load balanced configuration (1 Apache and 2 Tomcat instances on 
> the same machine). Load balancing is provided by mod_jk.
> 
>  
> 
> My application uses caches, and to purge caches I need to address, explicitly,  each 
> of  the Tomcat instances.
> 
>  
> 
> What's the best way to do this?
> 
>  
> 
> Regards
> 
>  
> 
>   Pierre
> 
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> 
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Re: Tomcat security?

[Ben Ricker]

Plus, if one runs as a non-priviledged user account with no login
privileges (i.e., locked account) and your permissions are correct, then
only root and Tomcat can read the users file.

If the hacker has root, the tomcat users are the least of your worries.

Ben Ricker
Wellinx.com


On Thu, 2003-07-03 at 14:23, Nathan McMinn wrote:
> What do you mean "stored in the clear"?  Are you referring to
> tomcat-users.xml?  Personally, I use a MySQL database to hold auth
> information for a JDBC Realm, and store them digested.  As an additional
> layer of security, the user account that is used to access the DB for the
> realm is only granted read access and only to the required user and roles
> tables.
> 
> - Original Message -
> From: "Mark W. Webb" <[EMAIL PROTECTED]>
> To: "Tomcat Users List" <[EMAIL PROTECTED]>
> Sent: Thursday, July 03, 2003 1:55 PM
> Subject: Re: Tomcat security?
> 
> 
> > I can't believe that passwords for SSL are stored in the clear.  That
> > places all responsibility of security to the OS, which may not be a good
> > idea.  What happened to defense-in-depth ??
> >
> > Nathan McMinn wrote:
> >
> > >When was the last time Tomcat had a published exploit?
> > >
> > >On a related note, these kind of "contests" are fairly common, and
> usually
> > >don't produce any kind of real activity.
> > >
> > >--Nathan
> > >
> > >- Original Message -
> > >From: "Eugene Lee" <[EMAIL PROTECTED]>
> > >To: "Tomcat Users List" <[EMAIL PROTECTED]>
> > >Sent: Thursday, July 03, 2003 10:51 AM
> > >Subject: Tomcat security?
> > >
> > >
> > >
> > >
> > >>Anyone want to discuss hardening Tomcat servers?
> > >>
> > >>Hacking Contest Threatens Web Sites
> > >>
> > >>By George V. Hulme, InformationWeek
> > >>Updated Wednesday, July 2, 2003, 3:00 PM EDT
> > >>
> > >>A hacking contest slated for this weekend could produce a rash
> > >>of Web-site defacements worldwide, according to a warning issued
> > >>Wednesday by security companies and government Internet security
> > >>groups.  The hacker defacement contest is expected to kick off
> > >>on Sunday. The contest supposedly will award free hosting
> > >>services, Web mail, unlimited E-mail forwarding, and a domain
> > >>name of choice for the triumphant hackers, according to a Web
> > >>site promoting the contest.
> > >>
> > >>...
> > >>
> > >>More details at:
> > >>
> > >>http://www.internetweek.com/story/showArticle.jhtml?articleID=10818014
> > >>
> > >>
> > >>--
> > >>Eugene Lee
> > >>http://www.coxar.pwp.blueyonder.co.uk/
> > >>
> > >>-
> > >>To unsubscribe, e-mail: [EMAIL PROTECTED]
> > >>For additional commands, e-mail: [EMAIL PROTECTED]
> > >>
> > >>
> > >>
> > >>
> > >
> > >
> > >-
> > >To unsubscribe, e-mail: [EMAIL PROTECTED]
> > >For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> >
> >
> >
> > -
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> >
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Slowness in Tomcat app

[Ben Ricker]

I am seeing a strange slowness on our QA tier. For some reason, this
only occurs on this one tier (we have a production setup running, as
well as a development "playground").

I have two Apaches talking to two Tomcats running on Solaris. They are
running Tomcat 4.0.5. I can see no reason for the problem. Both Tomcats
are up and running and listening on the correct ports. The only
indication of an issue (which may or may not be related) is the
following error in the mod_jk.log on the Apache side:

[Wed Jul 02 10:23:34 2003]  [jk_ajp_common.c (679)]: ajp_connection_tcp_get_message: 
Error - jk_tcp_socket_recvfull failed
[Wed Jul 02 10:23:34 2003]  [jk_ajp_common.c (1041)]: Error reading reply
[Wed Jul 02 10:23:34 2003]  [jk_ajp_common.c (1178)]: In jk_endpoint_t::service, 
ajp_get_reply failed in send loop 0

What does this error indicate? I am not a developer, so looking at the
source code would get me no where.

Thanks for your time,

Ben Ricker
Wellinx, Inc.


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Re: Number of Processes

[Ben Ricker]

As far as I understand it, top and ps changed in Redhat due to the
confusion of processes vs. threads. I am not positive that this is the
case, but you might just look up the CHANGE docs for the package that
supplies Redhat's ps and top (probably two different RPMs).

Ben Ricker
Wellinx.com

On Mon, 2003-07-07 at 12:38, Shannon Scott wrote:
> Thank You for helping, but I still think I am having a threading problem.
> I read here:
> http://marc.theaimsgroup.com/?l=tomcat-user&m=104378596024043&w=2
> that "On linux, the top command displays every java thread as a separate
> line item."
> 
> On my Linux Redhat 7.2 machine I get several listed with the top ( and ps )
> command, but on my redhat 8.0 machines I only get 1 listed with the top (
> and ps ) command.
> Does anyone understand this behavior?
> Thanks again.
> Shannon
> 
> - Original Message -
> From: "Tim Funk" <[EMAIL PROTECTED]>
> To: "Tomcat Users List" <[EMAIL PROTECTED]>
> Sent: Monday, July 07, 2003 11:56 AM
> Subject: Re: Number of Processes
> 
> 
> > The JVM is one process. One process with many threads. minProcessors!=OS
> > processes.
> >
> > minProcessors == number of concurrent workers at any given point in time
> >
> > -Tim
> >
> > Shannon Scott wrote:
> > > Hello,
> > > I have noticed that tomcat uses only one process on my new redhat 8.0
> machine.
> > > ( ps -elf | grep tomcat )
> > > There is an interesting explanation here.
> > >
> > > http://marc.theaimsgroup.com/?l=tomcat-user&m=103762836306068&w=2
> > >
> > > So I wrote a short test_process.jsp page ( below ) that I thought would
> force another process, but I still only show one when I try to open the page
> with multiple browsers.
> > > Does anyone have a way to force another process to begin?
> > >
> > > Could something in my configuration not allow other processes?
> > > I have set the minProcessors=5 in my server.xml Connector.
> > >
> > > Linux RedHat 8.0
> > > Apache 2.0.43 ( mod_jk )
> > > Tomcat 4.1.24
> > >
> > > Any help is greatly appreciated.
> > > Thank You.
> > > Shannon
> > >
> > > test_process.jsp:
> > > <%@ page session="false" %>
> > > <%
> > > Thread.sleep(1);
> > > out.print(" Done... ");
> > > %>
> > >
> > >
> >
> >
> > -
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> >
> >
> 
> 
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Re: Tomcat Load Balancing / Session Clustering - Tests

[Ben Ricker]

Well, load testing on the Apache end would be the way to go for
scalability testing. You can monitor the network connections to the
Tomcat instances (use of netstat does well here; grep for the number of
connections to each port every N seconds or minutes, etc.).

To test the session stuff, try shutting down instances as you are
running through the app. Can you access each Tomcat instance
individually? The best way is to use each Tomcat's web server and to
access it on the port. Then, shut down that Tomcat and access another
Tomcat by its port. If your session continues unaffected, you are good
to go.

If you have a REALLY good load tester that can capture page data (i.e.,
return codes and pages from the web server), you could randomly shutdown
Tomcat instances while load testing to see how that affects the ouput.

HTH,

Ben Ricker
Wellinx.com 


On Thu, 2003-07-10 at 09:52, Weissman, Alan wrote:
> Hey everyone,
> 
> I've set up a few Tomcat instances in a cluster and would like to test the
> scalability of the cluster as well as make sure the session clustering is
> working.  Testing scalability is easy and I have load balncing software, but
> whats the best way to make sure that sessions are clustering as expected?  
> 
> Thanks,
> 
> Alan Weissman
> Systems Engineer
> Concord Financial Technologies
> [EMAIL PROTECTED]
> 
> 
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Re: Memory requirements

[Ben Ricker]

On Tue, 2003-01-28 at 16:17, Cees van de Griend wrote:

> > and there are 27 - 35 instances of it.
> 
> This could be correct, does not sound unreasable.
> 
> > It takes up close to 1 GB of memory.
> 
> This does sound unreasable.
> How did you measure this?

Running just the examples, as was stated earlier, would rule out taking
upwards of a gig of memory. I run a fairly sophisticated web app which
gets roughly 100k hits a day our JVMs rarely take up 50-80meg a piece
(they are 4 JVMs taking roughly 1/4th of the requests).

I would suggest looking at vmstat and doing 'cat /proc/meminfo'. If you
see 1gig+ memory allocation, you can do the math. If you have less then
1gig memory, you should definately see heavy swap usage.


-- 
Ben Ricker <[EMAIL PROTECTED]>
Wellinx.com


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Re: Single-Sign-On (SSO) with Tomcats in 2 different servers

[Ben Ricker]

What you want it session replication. You can search the archives for
answers. Also, go to:
http://www.onjava.com/pub/a/onjava/2002/07/17/tomcluster.html?page=1
for a good overview.

Ben Ricker

On Mon, 2003-02-03 at 13:17, Víctor Ferrero del Valle wrote:
> Hi,
> 
> I have 2 servers, both with Tomcat. On each server is installed a
> different web application.
> Therefore, server A has a Tomcat with application A, and server B has
> another Tomcat (but same version) with Application B.
> The access to the applications is restricted, so the user must provide
> his userId and password before accessing the applications.
> Both applications authenticate against the same LDAP server.
> 
> The issue is that Id like to use Single Sign On (SSO) to access both
> applications, so that when a user accesses one application and
> identifies himself, he doesnt need to identify again when he accesses
> the other application.
> I think that in order to accomplishing this, the two Tomcats should be
> able to share
> sessions. Is this possible? Is there any other solution?
> 
> Thanks in advance.
> 
> 
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Re: loadbalancing with tomcat only and unable to bring admin andmanager pages

[Ben Ricker]

On Tue, 2003-02-11 at 10:06, krip pane wrote:

> i'm running tomcat 4.1.12.  I've a few questions any
> and all help is truly appreciated.
> 
> 1. what's the best way to monitor the health of
> tomcat?

There are a number of ways to do this: process watching, scripts that
access the certain URLs and match the result with what is expected,
third-party monitors like Big Brother, etc.

> 2. Is the default connector that comes packaged with
> tomcat capable of doing failover,loadbalancing or do I
> need to have apache in the front and a connector in
> between.

You need to have Apache out in front with a connector in between.

> 3. Is it possible to redirect tomcat to port 80 (or do
> i need apache in the front again) to avoid having the
> users type 8080 everytime?

You can have Tomcat use port 80, but you have to change the server.xml
to reflect that and start Tomcat as Root. However, you would not have
the load-balancing/failover.

> 4. while starting tomcat as user "tomcat" i keep
> getting "tomcat-users permission denied".  only
> wrokaround I found was to either give the user write
> access to the conf dir or comment out the memoryrealm
> altogether.  One, is it a good idea to give the suer
> write access to conf dir. Two i have to setup a user
> list (currently locally) to allow access to tomcat, if
> i comment out the memeoryrealm then how do i
> authenticate my users.

I give the user 'Tomcat' the ownership of the Tomcat directory. Should
be no pproblem with that, as log as the conf directory is not in the
'ROOT' docbase directory.

The answer above should fix two.

Ben Ricker

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Re: Moving to Tomcat 4.1.18

[Ben Ricker]

On Wed, 2003-02-12 at 07:46, Ramkumar Krishnan wrote:
> Hi All,
> I am a newbie to 4.1.18. We want to move our system (which
> is already running in live)to tomcat 4.1.18 from tomcat 3.2.1. Will
> there be a major work  involve?. How much time it will take?...What
> will be the major changes?..If you have any documents relating to
> this, please send it to me.
>  
> Any help would be appreciated.


The move is a rather large one. Both the server.xml and web.xml have
changed. Here is a rough outline of how I moved from 4.0.5 to 4.1.18:

1) Installed new version in a different directory then older version.
2) Changed Listening ports to different ports so that old and new
version could coexist without stomping on each other ports.
3) Started new version.
4) Checked to make sure all the examples and admin ran correctly in the
new port (see docs)
5) Added old configs to new configs (i.e., added special loggers, setup
mod_jk Listener, etc. I still keep the different port assignments)
6. Tested my Web Apps using the different ports
7. Take down new version and change port assignments to the same ports
as old setup.
8. Take down old version
9. Start new version
10. Test, Test, Test.

Ben Ricker

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Re: Jakarta 4.1.18 Web Server Administration

[Ben Ricker]

See http://jakarta.apache.org/tomcat/tomcat-4.1-doc/index.html in the
"Manager App HOW-TO" link.

Ben Ricker

On Wed, 2003-02-12 at 11:47, João Augusto Charnet wrote:
> I've just installed Jakarta 4.1.18, and I'd like to know where do I 
> configure the Web Administration ?
> I'd appreciate any kind of help. I'm new to this version, and I don't 
> know where to start.
> 
> Thanks a lot..
> 
> Sincerely,
> John
> 
> 
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Re: JTHOWTO

[Ben Ricker]

On Wed, 2003-02-12 at 14:00, Alberto A C A S Magalhães wrote:

> John, i am using your document, Red Hat Linux 7.2 + Apache... + Tomcat
> 4.1.18,
> I finish installing, java and tomcat.
> When i startup tomcat, it gives an error, of, JAVA_HOME environment variable
> not correctly defined!!
> Can you help me...

Although I am not John, I will fill his rather huge shoes for a
moment...

You need to set the JAVA_HOME variable. You can do this by setting it
manually on the command line (type: 'JAVA_HOME=/path/to/java/install')
or. better yet, assign the variable in the startup.sh file. Include a
line at the beginning under the comments:

JAVA_HOME=/path/to/java/install

The '/path/to/java/install' depends on how you installed Java. If by
RPM, I believe it is /usr/java/jdk_version#.

Ben Ricker

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RE: failing installation server.xml file

[Ben Ricker]

A few hints on using RPMs:

get to know the --query (or '-q') option to RPM. Specifically, you can
list out all files installed by an rpm by typing: 'rpm -ql
Package_name'. To get the exact package name (RPM usually requires the
full version number), type 'rpm -qa |grep package_name'.

For example, type 'rpm -qa |grep tomcat' to get the full package name.
Then type 'rpm -ql tomcat_package_name' to get all the files installed.
This will give you tthe layout of all the files installed. 
I would also suggest going over the stuff in /usr/bin. They are probably
shell scripts. You can see what configuration files are pulled in from
there. 

Having said all that, I do not use the RPMs for Tomcat myself. I use
Solaris as my Tomcat platform. The binaries, as suggested earlier, are
the easiest way to go.

Ben Ricker

> > -Original Message-
> > From: Jon Roberts [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, February 12, 2003 3:32 PM
> > To: Tomcat Users List
> > Subject: Re: failing installation server.xml file
> > 
> > 
> > Turner, John wrote:
> > > What does "move tomcat4" mean?  You changed the location of 
> > CATALINA_HOME?
> > > Did this change get propagated through all startup and 
> > admin scripts?
> > > 
> > > John
> > 
> > I changed the location of CATALINA_HOME, which the rpm put in 
> > /var/tomcat4. The only place I updated this value was in the 
> > tomcat4.conf file. I get feedback upon starting the engine that 
> > indicates it's using the new path (see earlier post), and I was under 
> > the impression that this was the only place I'd need to set 
> > it. I put it 
> > in my environment, too, but that didn't do it. Where else should I 
> > expect to change this value?
> > 
> > Incidentally, with the rpm the startup scripts end up as 
> > /usr/bin/tomcat4 and /usr/bin/dtomcat4. For whatever reason, the 
> > CATALINA_HOME/bin directory only contains a handful of .jar files.
> > 
> > Now I've backed out and re-installed it without moving CATALINA_HOME, 
> > and I get the same behavior. That is not it.
> > 
> > Jon Roberts
> > www.mentata.com
> > 
> > 
> > ---------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
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> > 
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Re: Tomcat Debug.

[Ben Ricker]

On Thu, 2003-02-13 at 05:28, João Augusto Charnet wrote:

> Is it possible to set Tomcat to listen to diferent ports when debugging ?

What I do with roughly 12 developers is that I add a logger for each
user that logs to each developers web app directory. They use the admin
interface to restart/redeploy their own context.

Not sure if this is exactly what you want...

Ben Ricker

> Here's the problem. We have a group of developers, who acesses tomcat 
> remotely in one machine. Each developer accesses one context of Tomcat. 
> However to Debug, since Tomcat uses one port, when somebody is 
> debugging, the execution of the entire group is going to be in debug 
> mode. This is not interesting. What we want is to each developer have 
> it's own debug port.
> Did I make myself clear ?
> If not please let me know.
> Thanks a lot...
> Sincerely,
> John.
> 
> 
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Error Log watcher

[Ben Ricker]

I am wondering if anyone has found a good error log watcher for Tomcat?
Swatch does not work because it is made for syslog-type logs where an
error message occurs on one line. So, it views a java error as one line,
which really does not help.

Anyone try any other programs?

Ben Ricker

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RE: Error Log watcher

[Ben Ricker]

On Fri, 2003-02-14 at 09:16, Shapira, Yoav wrote:
> Howdy,
> What would you require from this "error log watcher" ?

Good question! Sorry I did not include it. I am looking for something
similar to swatch, but can handle the multiple-lined errors. I would
want the program to have some sort of rules setting functionality
(preferably regex) and that allows actions based upon the specified
rules.

The actions would basically be alpha pages which would include the error
message in the page. Some throttling would be nice, so multiple errors
would not flood my pager.

Ben Ricker


> >-Original Message-----
> >From: Ben Ricker [mailto:[EMAIL PROTECTED]]
> >Sent: Friday, February 14, 2003 9:58 AM
> >To: Tomcat Users List
> >Subject: Error Log watcher
> >
> >I am wondering if anyone has found a good error log watcher for Tomcat?
> >Swatch does not work because it is made for syslog-type logs where an
> >error message occurs on one line. So, it views a java error as one
> line,
> >which really does not help.
> >
> >Anyone try any other programs?
> >
> >Ben Ricker
> >
> >--
> >Ben Ricker <[EMAIL PROTECTED]>
> >Wellinx.com
> >
> >
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> 
> 
> 
> This e-mail, including any attachments, is a confidential business communication, 
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>This e-mail is intended only for the individual(s) to whom it is addressed, and may 
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>the(an) intended recipient, please immediately delete this e-mail from your computer 
>system and notify the sender.  Thank you.
> 
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RE: Error Log watcher

[Ben Ricker]

On Fri, 2003-02-14 at 09:57, Shapira, Yoav wrote:
> Howdy,
> 
> OK.  I actually went and looked at the Swatch page out of interest.
> Cool tool.

Yes it is. I use it on my Apache error logs and to security checks on
the access_logs. Easy to setup to boot.

> Here's an approach that may work for you: use log4j.  Implement a
> TriggeringEventEvaluator
> (http://jakarta.apache.org/log4j/docs/api/org/apache/log4j/spi/Triggerin
> gEventEvaluator.html) to do the regex or whatever rules you want to
> decide required a page from a log message.  The evaluator will get every
> log message, including its complete stack trace and any details you want
> to add.  You can use log4j's MDC
> (http://jakarta.apache.org/log4j/docs/api/org/apache/log4j/MDC.html) to
> provide any details needed in order to decide whether the event merits a
> message to your page or not.
> 
> Log4j comes with an SMTP appender that sends email and has all the logic
> you want: throttling and arbitrary rules for even evaluation.  See
> http://jakarta.apache.org/log4j/docs/api/org/apache/log4j/net/SMTPAppend
> er.html for details.

Some more information about myself: I am a system administrator. The
extent of my programmin g experience ends at "Perl for System
Administrators". So I have a questions that may sound dumb:

Can you use these appenders as part of catching exceptions from within
the Code? That is, if you catch a certain exception that is going to be
logged, you set isTriggeringEvent on it and Log4J can then do what needs
to be done? 

> Log4j doesn't come with a pager appender right now.  You could use a JMS
> appender to send events (that pass the triggering event evaluator's
> criteria) to a JMS server somewhere, as there are J2EE servers that can
> handle paging.  Alternatively, you can write the pager appender yourself
> and maybe even donate it to us as a log4j contribution ;)  

Using the SMTPAppender to email it my pager would be plenty.

> This may seem like a lot, but it's really more work explaining the
> process than doing it ;)

If I understand it right, you are right. This would be easily added to
our existing exception handling.

Thanks for the info!

Ben Ricker

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Re: Tomcat as a production server?

[Ben Ricker]

You want to put a profiler on that box and see what threads are racing
away. You can also tell the JVM to throw a traceback of all the threads
being used, but I for got how exactly :(

Anyway, look at the code. You definately have something going on there.

Ben Ricker

On Sat, 2003-02-15 at 18:47, Arcadius A. wrote:
> Hello!
> We're using tomcat 4.1.12, Apache 1.3.27 , mod_jk1.2.2 on a redhat 7.3
> server ( AMD Duron 1.2GHz, 256 RAM).
> 
> The problem is that the server runs quite fine the first few days but
> after a week, the server is heavily busy: While the number of tomcat
> processes and the memory usage is slightly the same, the CPU usage of each
> of the tomcat processes highly increase (  from 0.0% to about 19% for each
> of the tomcat processes). so tomcat can no longer respond to requests
> from the browser. the only one thing I use to do is restart the
> server then everything works fine again
> Note that all the  6 java processes shown in the attached file are from
> tomcat. And we're using tomcat's default configurations.
> 
> Please has anyone coped with this problem before?
> 
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Cookie Handling Question

[Ben Ricker]

We have some strange behavior going on, probably due to the strange
setup one of our customers use. Before I get into it, some facts:

Running Apache 1.3.27 with mod_jk 1.2.1 on two Redhat Linux servers
talking to 4 Tomcat 4.0.5 instances. The Tomcats are running 2 per
server on Sun Solaris 8 boxes using Sun's JDK 1.4.1. The Apache's are
load-balancing to the Tomcats and we have a Cisco load-balancer in front
of the Apache servers.

Here is where it gets messy: the client is using IE 5.5 running on a
Citrix terminal server. They are using multiple stations within a
location and using the same account! So, user goes to station 1, logs
in, does their business, then leaves the station without explicitely
logging out of the app. They go to station 2, login, do their thing
there then leavesetc.

On top of this, there are other users who use the same stations but use
different browser windows and different logins. 

The problem is that the user complains of having to re-login to station
1 after "a couple of hours" when he comes back to use the session he
left open previously. Of course, with roughly 200 users at this site, we
have only had 2 complaints of this behavior but we are doing "due
diligence" to figure out what is going on. It looks like the browser is
getting "confused" about which session cookie is the right one for the
session and it sends the wrong cookie, thereby getting the "invalidated
session, please login again" screen.

Can anyone shed any light on how this sort of behavior might cause
session timeouts because of mishandled cookies? How does IE 5.x know
that a cookie is for this particular window, let's say, and not another?
Are cookies tied to windows? Being a Unix sysadmin, I can only look out
Windows (TM); I don't use them.

Any info would be appreciated.

Ben Ricker 
 
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Causing a dump with a signal?

[Ben Ricker]

I remember reading where oen can send a kill signal with Unix that will
cause the JVM to do a thread dump before exiting. Does this sound
familiar to anyone?

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Re: maxThreads

[Ben Ricker]

Running against a database? Are you pooling the connections? We hit
maxthreads when either the DB is messed up (i.e., someone locks a table)
or before, when the programmers forgot to run socket_close() on the DB
connection, thereby returning it to the pool. 

HTH,

Ben Ricker

On Mon, 2003-08-18 at 09:42, Geralyn M Hollerman wrote:
> I am getting this message in my catalina.out file: "SEVERE: All threads
> are busy, waiting. Please increase maxThreads or check the servlet
> status500 500"; I have no idea why all threads would be busy and
> waiting. 
> 
> In the standard distribution of Tomcat 4.1.24, the value of maxThreads
> is 75; this number (in the  element would cause Tomcat to
> "shut down" after a couple of hours on my moderately busy server. It was
> suggested to me that I raise this value, but all it appears to have done
> is delay the inevitable stopping of Tomcat once all the threads were
> busy and waiting; but I thought that Tomcat recycled threads, no? What
> are the threads waiting for to tell them to stop waiting? How can I get
> them to "move on"?
> 
> Thanks!


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Re: maxThreads

[Ben Ricker]

On Mon, 2003-08-18 at 12:50, Geralyn M Hollerman wrote:
> Ben Ricker wrote:
>  
> > Running against a database? Are you pooling the connections? We hit
> > maxthreads when either the DB is messed up (i.e., someone locks a table)
> > or before, when the programmers forgot to run socket_close() on the DB
> > connection, thereby returning it to the pool.
> 
> Why, yes I am going against a database - we could never get Tomcat
> connection pooling working right with it, so we went with just internal
> (Ingres db) connection pooling. I don't know a whole lot about that, as
> that's not the primary app I work on - it's kind of been just "there",
> if you know what I mean, but now that you mention it, I think someone
> might be able to lock a table - I'll have to look into that. Forgive me
> for showing my ignorance, but is socket_close() a Java routine? I don't
> think I've seen that before - we probably call it something different.
> Is it anything like invalidating a session?

socket_close() is a Unix system call...just a bit of jargon on the admin
side. I myself am not a programmer, so I do not know what the exact
method in Java is. 

An easy way to figure out if it is database connections not being closed
is to check the connections from the Tomcat server to the database (if
you are admin) or, if you have the access, check the jdbc (or odbc)
connections used on the database. There should not be more then 10; we
run a DB pool of 10 to handle roughly 100k hits per day. We run an
almost 100% dynamic site and those 10 connections handle the load
admirably. If the number of DB connections grows, we know that either
our load has grown all of a sudden or there is a DB issue. 98% of the
time, it is a DB issue. We have gotten rid of the socket closure issue
as the developers jobs were on the line after they audited the socket
closures that caused a few production outages.

HTH,

Ben Ricker 


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Re: maxProcessors problem

[Ben Ricker]

On Mon, 2003-08-18 at 15:42, Mike Cherichetti (Renegade Internet) wrote:



> java.lang.OutOfMemoryError: JVMCI015:OutOfMemoryError, cannot create anymore
> threads due to memory or resource constraints

There is the cheese right there. You need to WAY up your Java System
memory heap using JAVA_OPTS. See this post on the archives:
http://mikal.org/interests/java/tomcat/archive/view?mesg=53417. All the
available options are in the Java docs.

Ben Ricker


> at java.lang.Thread.start(Native Method)
> at
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.(ThreadPool.
> java:582)
> at
> org.apache.tomcat.util.threads.ThreadPool.openThreads(ThreadPool.java:460)
> at
> org.apache.tomcat.util.threads.ThreadPool.runIt(ThreadPool.java:293)
> at
> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:536)
> at
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
> a:619)
> at java.lang.Thread.run(Thread.java:568)
> 
> Now, I know that the JVM has plenty of memory left that it can be allocated
> and the system has plenty of free memory, so I'm not sure it's really a
> memory issue.  As I said, Tomcat still runs and the memory allocated to the
> JVM increases, it just doesn't have nearly enough request processors created
> at the point this error happens to deal with all of the traffic.  I've tried
> playing around with ulimit settings, but those didn't have any impact.  I've
> also tried the Sun JVM and it did the same thing.
> 
> Has anyone run into this problem or something like it before?
> 
> Any help would be greatly appreciated!
> 
> Thanks,
> Mike
> 
> 
> 
> 
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Re: mod_jk and Tomcat Lose Touch

[Ben Ricker]

What kind of error are you getting that makes you thing they are "losing
touch". Check the mod_jk log and see what kind of errors it is throwing
and post an example.

Ben Ricker
Wellinx, Inc.

On Mon, 2003-08-25 at 10:54, Fred Whipple wrote:
> Hi all,
> 
> On one of our servers, we were running Red Hat Linux 7.3 with Apache
> 1.3.X, mod_jk, Sun JDK 1.4.1, and many (~150) instances Tomcat of
> various flavors.  Everything worked perfectly until we upgraded to Red
> Hat 9.  Now, it seems like mod_jk and Tomcat are losing touch until the
> Tomcat JVM is restarted.  This happens after maybe a day or so using
> both Apache 1.3.X and Apache 2.0.X.
> 
> >From what we've observed, it seems to a problem specific to mod_jk.
> This is because running Apache 1.3.X or 2.0.X under Red Hat 9 with the
> old-skool mod_jserv and ~100 Tomcat instances does not cause a problem
> at all.  Also, running either Apache 2 or 1.3 on RH 9 with just a couple
> JVM's does not cause a problem either.
> 
> I've already tried re-compiling mod_jk on RH9, the same server that's
> having the trouble to account for any library change issues.  No dice
> I'm afraid.
> 
> Any ideas?
> 
> Thanks!
> 
>   -Fred
> 
> 
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RE: mod_jk and Tomcat Lose Touch

[Ben Ricker]

On Mon, 2003-08-25 at 13:08, Fred Whipple wrote:
> Ah, the symptoms, of course ;-)
> 
> There actually aren't any errors AFAIK.  Perhaps there's a more verbose
> logging level?  I couldn't find any obvious info on this in the manual.

In the settings you put in httpd.conf, you should have added a
'LogLevel' directive. If you did not, then you can! The line I have is:

JkLogLevel error

Change the 'error' to debug and restart Apache.

Ben Ricker
Wellinx, Inc.



> What actually happens is if I make a request to a JSP, for example, that
> should normally be forwarded onto Tomcat, the request simply hangs forever.
> Apache logs the request nothing in the Tomcat logs suggest to me it's
> receiving the request.
> 
> Thanks,
> 
>   -Fred
> 
> > -Original Message-
> > From: Ben Ricker [mailto:[EMAIL PROTECTED] 
> > Sent: Monday, August 25, 2003 1:09 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: mod_jk and Tomcat Lose Touch
> > 
> > 
> > What kind of error are you getting that makes you thing they 
> > are "losing
> > touch". Check the mod_jk log and see what kind of errors it 
> > is throwing
> > and post an example.
> > 
> > Ben Ricker
> > Wellinx, Inc.
> 
> 
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Re: mod_jk load balancing with multiple apache servers

[Ben Ricker]

I have the exact same configuration but I do not do session replication
because of the fact that our app was not written correctly (something
about serializing variables and ours are not serialized; it will take a
code audit and rewrite to accomplish it).

Anyway, here is what you can do:

http://www.theserverside.com/resources/article.jsp?l=Tomcat

Tomcat 5, now in development, will have session replication across
Tomcats (i.e., clustering) built-in.

I will say that Mr. Moliere makes a good point: sending session data
across the network unencrypted is a rather large security hole. But then
again, the communication between mod_jk and Tomcat is by default
unencrypted.

Ben Ricker
Wellinx, inc.


On Tue, 2003-08-26 at 09:39, Peter Anning wrote:
> Hi,
> 
> I am trying to implement the following configuration:
> 
> 
> +++
>   Cisco Load Balancer
> +++
> |
> | (http)
> |
> +++
>Apache AApache B Apache Cluster Layer
> mod_jk  mod_jk
> +++
> |
> | (ajp13)
> |
> +++
> TomcatI.myhost.com   TomcatII.myhost.comJBoss Cluster Layer
> +++
> 
> 
> I can configure mod_jk in each of the Apache instances to
> know about the two tomcat instances. So loadbalancing and
> failover would work with one instance of apache.
> 
> Is there any way to have the Apache ``cluster'' layer
> know about other ``members'' in the layer and the 
> current servlet connection status?
> 
> Rgds
> Peter
> 
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RE: mod_jk and Tomcat Lose Touch

[Ben Ricker]

On Tue, 2003-08-26 at 15:33, Fred Whipple wrote:
> > In the settings you put in httpd.conf, you should have added a
> > 'LogLevel' directive. If you did not, then you can! The line 
> > I have is:
> > 
> > JkLogLevel error
> > 
> > Change the 'error' to debug and restart Apache.
> 
> This worked well, and yielded some errors:
> 
> **
> [Tue Aug 26 16:25:19 2003]  [jk_connect.c (203)]: jk_open_socket, connect()
> failed errno = 111
> [Tue Aug 26 16:25:19 2003]  [jk_ajp_common.c (626)]: Error connecting to
> tomcat. Tomcat is probably not started or is listenning on the wrong port.
> Failed errno = 111

Looks like there is a mismatch between the workers.properties and the
server.xml (Tomcat's config file). The server.xml sets up Tomcat. More
importantly, it sets up a Connector which opens a socket connection on a
defined port (Look for the Connector' section in the Service section of
the server.xml). This port is what mod_jk needs to know about in the
workers.properties. Some snippets from my config:

-Server.xml snippet-
 
 

-End Server.xml snippet-


-mod_jk's workers.properties file snippet-
# 
# First tomcat server
# 
worker.tomcat1.port=11009
worker.tomcat1.host=10.1.1.1
worker.tomcat1.type=ajp13
-End mod_jk's workers.properties file snippet-

Check out both of these files and make sure the config is setup
cporrectly. It looks like either the Connector is not configured or the
workers.properties does not have the right info for the workers spawned
by Apache.

> All of these errors appeared at the same time I was trying to view a JSP on
> a site that had "lost touch."  I was doing a tail -f and the log file had
> been quiet until I tried to view this JSP -- then all these popped-up at
> about the same time.
> 
> Immidiately I opened a telnet session to this particular Tomcat instance's
> AJP 1.3 port, and verified it was responding.  Also, *all* of the Tomcat
> instances are on the same host as the Web server, so all the workers are
> traveling over 127.0.0.1.

Do you use multiple Apaches on the server? 

Since I would be speculating wildly, why not post the workers.properties
file as well as the Connector tags in the server.xml on the Tomcats.

Ben Ricker
Wellinx.com


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RE: Best JVM for Tomcat

[Ben Ricker]

I was running Sun 1.4.3 on Linux Redhat 7.3 with the -server line and we
had mucho stability problems. Removed the -server and the problems
disappeared. May depend on the particular app running (the developers
thought it was related to the swing code.

Ben Ricker

On Wed, 2003-12-03 at 12:40, Oscar Carrillo wrote:
> Ok, I just checked and I have been using "-server" with no problems. So
> that makes RH7.3 and RH9.
> 
> Oscar
> 
> On Wed, 3 Dec 2003, 
> Ryan Lissack wrote:
> 
> > Hi,
> > 
> > We use the -server option on all our live Linux machines and have not had
> > any problems at all.
> > 
> > JRE 1.4.1_03 on RedHat 9.
> > 
> > Ryan.
> > 
> > -Original Message-
> > From: Shapira, Yoav [mailto:[EMAIL PROTECTED]
> > Sent: 03 December 2003 17:46
> > To: Tomcat Users List
> > Subject: RE: Best JVM for Tomcat
> > 
> > 
> > 
> > Howdy,
> > I don't use -server on linux now, haven't tried it as I had problems
> > with it on the Solaris platform.  Perhaps someone else could shed more
> > light...
> > 
> > Yoav Shapira
> > Millennium ChemInformatics
> > 
> > 
> > >-Original Message-
> > >From: Oscar Carrillo [mailto:[EMAIL PROTECTED]
> > >Sent: Wednesday, December 03, 2003 11:33 AM
> > >To: Tomcat Users List
> > >Subject: RE: Best JVM for Tomcat
> > >
> > >Does "-server" work now? What version of Linux distro did "-server"
> > cause
> > >problems, if any?
> > >
> > >Thanks,
> > >Oscar
> > >
> > >On Wed, 3 Dec 2003, Shapira, Yoav wrote:
> > >
> > >>
> > >> Howdy,
> > >> I use Sun's latest on various platforms (Solaris 8, 9, SuSe, Intel)
> > >> without a problem for both tomcat 4 and 5.  The only caveat is the
> > >> -server mode, which used to reduce stability.
> > >>
> > >> I knew there would be a jRockit response from Senor Cekvenich even
> > >> before expanding this thread ;)
> > >>
> > >> Yoav Shapira
> > >> Millennium ChemInformatics
> > >>
> > >>
> > >> >-Original Message-
> > >> >From: David Rees [mailto:[EMAIL PROTECTED]
> > >> >Sent: Wednesday, December 03, 2003 7:09 AM
> > >> >To: Tomcat Users List
> > >> >Subject: Re: Best JVM for Tomcat
> > >> >
> > >> >On Wed, Dec 03, 2003 at 08:43:34AM -0300, Walter do Valle wrote:
> > >> >>
> > >> >> What is the best version of J2SDK to run Tomcat 4.1.29 over Linux?
> > >> >
> > >> >On Linux, I've been using the latest from Sun, 1.4.2_02 without any
> > >> >issues.  There may be others which are faster, but performance
> > hasn't
> > >> >been an issue for me.
> > >> >
> > >> >-Dave
> > >> >
> > >>
> > >-
> > >> >To unsubscribe, e-mail: [EMAIL PROTECTED]
> > >> >For additional commands, e-mail: [EMAIL PROTECTED]
> > >>
> > >>
> > >>
> > >>
> > >> This e-mail, including any attachments, is a confidential business
> > >communication, and may contain information that is confidential,
> > >proprietary and/or privileged.  This e-mail is intended only for the
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> > >printed, disclosed or used by anyone else.  If you are not the(an)
> > intended
> > >recipient, please immediately delete this e-mail from your computer
> > system
> > >and notify the sender.  Thank you.
> > >>
> > >>
> > >> -
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> > >>
> > >
> > >
> > >-
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> > 
> > 
> > 
> > 
> > This e-mail, including any attachments, is a confidential business
> > communication, and may contain information that is confidential, proprietary
> > and/or privileged.  This e-mail is intended only for the individual(s) to
> > whom it is addressed, and may not be saved, copied, printed, disclosed or
> > used by anyone else.  If you are not the(an) intended recipient, please
> > immediately delete this e-mail from your computer system and notify the
> > sender.  Thank you.
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Re: Monitoring Apache Traffic

[Ben Ricker]

Look at the browsers "Lock" icon. Sniffing the traffic seems like
overkill to me.

Ben Ricker
Wellinx, Inc.

On Thu, 2003-12-04 at 11:30, Asif Chowdhary wrote:
> Hi,
> 
> Is there any way to determine if the contents sent from the client to the server is 
> encrypted or not? I am not using a browser as a client. I am using a windows 
> application.
> If I can see the contents then I will know if SSL is working. 
> Any tools that will sniff the line to display the contents.
> 
> Thanks
> Asif
> 
> 
> 
> 
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Re: Apache + Tomcat + MOD_JK

[Ben Ricker]

On Wed, 2003-12-24 at 10:05, Hari Om wrote:
> Hello,
> 
> I am using Apache 2.0.47 and Tomcat 4.1.27 on SuSE 8.0 box on same machine.
> I am trying to make use of MOD_JK.SO (jk connector)which I build it from 
> source.
> I have 2 different Users to the system "httpd" and "jakarta" with respective 
> directories as /usr/local/httpd and /usr/local/jakarta
> 
> /usr/local/httpd has httpd:httpd as owner and group
> /usr/local/jakarta has jakarta:jakarta as owner and group
> 
> I have following files:
> FILENAME OWNERGROUP   DIRECTORY
> -
> workers.properties   jakarta   jakarta/usr/local/jakarta/conf/jk/

This needs to be accessible by http. i have mine in the
$APACHE_HOME/conf directory.

> server.xml   jakarta   jakarta/usr/local/jakarta/conf/
> mod_jk.so   httpd httpd  /usr/local/httpd/modules/

This is Ok.

> mod_jk.log  jakarta   jakarta/usr/local/jakarta/logs

Needs to be in the $APACHE_HOME/logs directory, or a place that the
httpd user can write to.

Ben Ricker
Wellinx, inc.


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Re: Where does system.out go?

[Ben Ricker]

I usually get system.out and/or system.err in the catalina.log file.

Ben Ricker
Wellinx.com


On Wed, 2003-10-08 at 15:36, Adam Hardy wrote:
> Dude, you just hijacked my thread! Bad netiquette. Anyway, your 
> System.out.println statements will go to the console, i.e. the command 
> line window where you are running tomcat. If you have no command line 
> window, they will probably get caught in a system.out or system.err file 
> although I'm not sure where.
> 
> HTH
> Adam
> 
> On 10/08/2003 10:13 PM Michael Remijan wrote:
> > Hello,
> > 
> > In a JSP page i'm doing some testing.  I have System.out.println()
> > statements in there temporarily.  Anyone know where they go?  I checked
> > the Context's logger that they are not there.
> > 
> > Mike
> > 
> > 
> > -
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> > 
> > 


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RE: Java Upgrade Messed Up Tomcat

[Ben Ricker]

On Wed, 2003-10-29 at 11:53, Jeremy Whitlock wrote:
> Here is the output to stderr.log:
>  
> log4j:ERROR setFile(null,true) call failed.
> java.io.FileNotFoundException: logs\openejb.log (The system cannot find
> the path specified)

U, this is pretty self-explanatory. Looks like you have a malformed
path spec in a properties file. Note that there is no '\' in front of
'logs\openejb.log'.

Ben Ricker
Wellinx, inc.


> at java.io.FileOutputStream.openAppend(Native Method)
> at
> java.io.FileOutputStream.(FileOutputStream.java:174)
> at
> java.io.FileOutputStream.(FileOutputStream.java:102)
> at
> org.apache.log4j.FileAppender.setFile(FileAppender.java:272)
> at
> org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:15
> 6)
> at
> org.apache.log4j.FileAppender.activateOptions(FileAppender.java:151)
> at
> org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:248)
> at
> org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java
> :124)
> at
> org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java
> :88)
> at
> org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator
> .java:640)
> at
> org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator
> .java:598)
> at
> org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConf
> igurator.java:523)
> at
> org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.j
> ava:407)
> at
> org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.j
> ava:431)
> at
> org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConver
> ter.java:456)
> at
> org.apache.log4j.LogManager.(LogManager.java:145)
> at
> org.apache.log4j.Category.getInstance(Category.java:517)
> at org.openejb.util.Logger.getInstance(Logger.java:109)
> at org.openejb.OpenEJB.init(OpenEJB.java:150)
> at org.openejb.OpenEJB.init(OpenEJB.java:130)
> at
> org.openejb.loader.EmbeddedLoader.load(EmbeddedLoader.java:71)
> at
> org.openejb.loader.EmbeddingLoader.load(EmbeddingLoader.java:84)
> at
> org.openejb.client.LocalInitialContextFactory.getInitialContext(LocalIni
> tialContextFactory.java:65)
> at
> javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
> at
> javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
> at
> javax.naming.InitialContext.init(InitialContext.java:219)
> at
> javax.naming.InitialContext.(InitialContext.java:195)
> at
> org.openejb.loader.LoaderServlet.init(LoaderServlet.java:82)
> at
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.jav
> a:918)
> at
> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:810)
> at
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.j
> ava:3279)
> at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:3421
> )
> at
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785)
> at
> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:478)
> at
> org.apache.catalina.core.StandardHost.install(StandardHost.java:738)
> at
> org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:300)
> at
> org.apache.catalina.startup.HostConfig.start(HostConfig.java:389)
> at
> org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:23
> 2)
> at
> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSu
> pport.java:155)
> at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131)
> at
> org.apache.catalina.core.StandardHost.start(StandardHost.java:638)
> at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
> at
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343)
> at
> org.apache.catalina.core.StandardService.start(StandardService.java:388)
> at
> org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
> at
> org.apa

RE: Tomcat Settings and Performance

[Ben Ricker]

On Mon, 2003-11-17 at 06:21, Jonathan Holloway wrote:

> I could cluster multiple copies of Tomcat on seperate machines with a simple load 
> balancer on the front end?  I'd ratehr not go that route yet though and see if I can 
> get it so that single machine can handle up to 250 - 300 simultaneous requests.
> 
> Is there any point in clustering instances of Tomcat on the same machine?

For NIC failover, I setup two Tomcats on each server bound to each NIC.
So, if one NIC goes, I only lose one instance and that box can still
serve some connections (and not be totally out of the running).

You might also want to run multiple, different contexts to keep apps
clustered in separate Tomcats for reasons of wanting a certain App to
always run while not being as worried about another App running (say a
QA context?).

Ben Ricker
Wellinx, inc.

> Many thanks,
> Jon.
> 
> 
> 
> 
> --
> 
> - Original Message -
> 
> DATE: Fri, 14 Nov 2003 06:13:27
> From: Peter Lin <[EMAIL PROTECTED]>
> To: Tomcat Users List <[EMAIL PROTECTED]>
> Cc: 
> 
> >Jon,
> > 
> >what are the specs of the machine?
> > 
> >you mentioned 1GB of ram, but what is the OS?
> > 
> >peter
> >
> >
> >
> >
> >-
> >Do you Yahoo!?
> >Protect your identity with Yahoo! Mail AddressGuard
> 
> 
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> Need a new email address that people can remember
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Re: [OT] java 1.3 and Fedora

[Ben Ricker]

We had the same problem while installing Oracle on a Redhat 9 box. They
had us add the LD_ASSUME_KERNEL to 2.4.

HTH,

Ben Ricker
Wellinx, Inc.


On Mon, 2003-11-17 at 15:54, Christopher Schultz wrote:
> Mark,
> > I am working on an old project using Sun JDK 1.3.  I get an error 
> > message while using ant.  The error is listed below:
> > 
> > Error occurred during initialization of VM
> > Unable to load native library: 
> > /usr/local/jdk1.3.1_08/jre/lib/i386/libjava.so: symbol __libc_wait, 
> > version GLIBC_2.0 not defined in file libc.so.6 with link time reference
> > 
> > I have set the environment variable LD_ASSUME_KERNEL to 2.2.5.  I even 
> > tried 2.4.1, as mentioned in an article I found online.  Does anyone 
> > know how to get around this issue?
> 
> Since Fedora is pretty new (like a week old), you might want to avoid it 
> for a while. It's possible that its glibc version is not complete or 
> something like that.
> 
> Stick to RedHat standard or Debian or whatever your favorite distro is 
> for the time being. :)
> 
> -chris
> 
> 
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Re: Developing on a different platform from production

[Ben Ricker]

It depends on what you mean by 'test'. If you are doing load testing, 
then obviously this will not do as the platform and OS can dictate 
performance. Also, there are differing problems in the jdks based on 
platform: Sun jdk w/Hotspot has had some problems lately which do not 
crop up on the other jdks (Sun's jdk is usually ahead of Linux's, or so 
I have noticed. 1.3 was in beta well after 1.3 was released for Sun).

However, if you are just talking about functional testing, I think going 
to a Linux box is Ok.

Btw, have you seen the new Netra series of Sun boxes? They are damn 
cheap and may be an alternative to Linux. I myself suport a web app that 
runs on Linux is production but will move to a Linux/Sun load balanced 
solution soon.

Ben Ricker
System Administrator
Wellinx.com

Penberthy, Bill wrote:

> Generally, we try to to develop and test on the same platforms (Solaris)
> that we will be deploying on - but I am curious as to whether that is really
> necessary.  Has anyone ran into issues of developing and testing on one
> platform and deploying on another?  I would like to put some Linux machines
> out there (a bit cheaper...) for development and testing - but am wondering
> if this could cause problems as we deploy onto the Sunboxes.  Your thoughts,
> experiences, and comments would be welcome.
> 
> Thanks!
> 
> Bill Penberthy
> Sr. Functional Architect
> IQNavigator

Re: Tomcat 4.1.12 hanging under stress?

[Ben Ricker]

On Mon, 2002-10-28 at 14:38, William Lee wrote:
> I'm running a Tomcat 4.1.12 (with the coyote connectors running SSL) on 
> RH Linux with a 2.4.9 kernel and IBM JRE 1.3.1 build cxia32131-20020622.

I am wondering about the kernel version here; you have rather old
kernel, a version which is considered unstable. I would suggest
upgrading the kernel, especially since you have SMP.

This is just a small suggestion.anything in the logs?

Ben Ricker
Wellin.com
 
> I initiated around 50 concurrent https connections from JMeter to the 
> test server I have (which is a moderately powerful dual PIII 500 with 
> 512 MB RAM and Ultra-SCSI drives) and I realized some random hangings 
> after running for a while.  When the hanging happened, I could still 
> connect to the port that I opened.  However, I couldn't do anything once 
> I connected to the port.  The JVM seemed to be running still, but tomcat 
> wouldn't response.
> 
> BTW, I tried connecting to the port using "openssl s_client ..." and I 
> was able to connect to the port when it hung, but I can't issue any HTTP 
> commands.
> 
> I can, however, shutdown the server from the control port with no problem.
> 
> Can somebody tell me how to address / debug this problem?
> 
> -- 
> William Lee (Will)| Sendmail Inc.
> Email:  [EMAIL PROTECTED] | http://www.sendmail.com
> Tel:(510) 594-5505|
> 
> 
> 
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Re: Tomcat 4.1.12 hanging under stress?

[Ben Ricker]

On Mon, 2002-10-28 at 20:24, William Lee wrote:
 
> Hmm, it may have something to do with the kernel, I'll try later to see 
> whether this is the case.  I don't think the log gives me much though. 
> Anyhow, I've made a weird discovery that I found interesting.

After the other info you gave me, I am less concerned with the kernel
now. I would still upgrade it, though. There is a nasty networking bug
in the 2,4,9 kernel, I believe, that effects scalability.

> It seems like there's a "barrier" when the JVM consume around 90MB of 
> RAM.  Once the JVM got over that barrier, then things will keep working.

You may be dealing with garbage collection issues. If the GC gets going
before that, it will lock everything up while it GCs.

Try messing with the following options:

-Xms and  -Xmx using CATALINA_OPTS set in the startup script. For
example: 

CATALINA_OPTS=-Xms128M -Xmx2048M

would set the heap size minimum to 128meg and would force garbage
collection at 2048meg. Play with that and see how it affects the
slowdown.

You can alos set two other options to help out debugging:

-Xincgc and -Xloggc:gcinfo.log

I forgot what the first setting does (ingrease GC?) but the second one
turns on logging when it garbage collects. If you watch that file as the
failure happens, you can tell if garbage collecting is having an effect
or not.

HTH,

Ben Ricker
Wellinx, Inc.




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Re: MOD_JK.SO

[Ben Ricker]

I got this on Apache 1.3.27. I assume you downloaded the binary
mod_jk.so. Make sure that you got that fits your use or non-use of SSL
in the server. Not sure where you got the binary, but there is a note on
the jakarta connector download page that lists which binary is for
which.

I myself just compiled the connector from source; I could not get the
binary connector to work with Apache without getting that error.

Ben Ricker
Wellinx.com

On Tue, 2002-10-29 at 12:02, [EMAIL PROTECTED] wrote:
> 
> Hi,
> 
> We are trying to get Tomcat 4.1.12 and Apache 1 3 26 working together using
> mod_jk.so.
> 
> We are receiving the followitng error :
> 
> Starting httpd: Syntax error on line 224 of /etc/httpd/conf/httpd.conf:
> Cannot load /usr/local/apache/libexec/mod_jk.so into server:
> /usr/local/apache/libexec/mod_jk.so:
>  undefined symbol: ap_ctx_get
> 
> Never done this before, and im probably just plain wrong !
> 
> Any replys would be apperciated,
> 
> Cheers,
> 
> M
> 
> Mehdi Nejad - Senior Developer
> [EMAIL PROTECTED]
> ~~
> Bluewave Ltd - Online Creations
> http://www.bluewave.com
> Tel. +44 (0)20 7479 8394
> ~~
> 
> 
>  
>   
>   "Jordi Guijarro"   
>   
>   <[EMAIL PROTECTED]>   
>   ab.es>   cc:   
>   
>Subject:  Run Tomcat 4.1.2 on Novell  
>   
>   29/10/2002 17:38   
>   
>   Please respond to  
>   
>   "Tomcat Users  
>   
>   List"  
>   
>  
>   
>  
>   
> 
> 
> 
> 
> Hi,
> 
> How can I run Tomcat 4.1.2 on Novell Netware 5.1 ¿?  Nowadays I've a
> script (ncf file)  to start catalina in Tomcat 4.0.4 version. This
> script is not included in Tomcat 4.1.2. Someone knows about it ?
> 
> Thank you,
> 
> Jordi
> 
> 
> 
> 
> 
> 
> --
> To unsubscribe, e-mail:   <mailto:tomcat-user-unsubscribe@;jakarta.apache.org>
> For additional commands, e-mail: <mailto:tomcat-user-help@;jakarta.apache.org>
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Re: MOD_JK.SO

[Ben Ricker]

On Tue, 2002-10-29 at 12:22, [EMAIL PROTECTED] wrote:
> 
> 
> according to this :
> 
> http://jakarta.apache.org/tomcat/tomcat-4.1-doc/config/connectors.html
> 
> i should need mod_jk2 and not mod_jk (well, mod_jk may also work, but
> hey,..) - and its enabled by default on the appserver im using..

I use the mod_jk version for stability reasons: mod_jk2 is rather new,
so I would rather use the mostly "tried-and-true" mod_jk 1.x. That is my
personal opinion, though. Others use mod_jk2 without any problems.
 
> If by any chance i am right, can someone tell me why I cant find a humble
> link to download the file ?  maybe jakarta are having webserver problems.

Try http://jakarta.apache.org/builds/jakarta-tomcat-connectors/ for
connetor downloads, or go to John Turner's wonderful page:
http://www.johnturner.com/howto/apache-tomcat-howto.html.

Ben Ricker
Wellinx.com


 
> I quote from the site :
> 
> 
> 
> (Do not hesitate to ask for the binary needed for your platform to  
> the Tomcat mail lists, but be patient). 
> 
> 
> 
> 
> so here goes : im using linux - can i have this file - please..
> 
> thanks 4 reading this far.
> 
> Mehdi
> 
> 
> 
> 
> 
> 
> 
>  
>   
>   Mehdi.Nejad@bluew  
>   
>   ave.com  To:   "Tomcat Users List" 
><[EMAIL PROTECTED]>   
>cc:   
>   
>   29/10/2002 18:02 Subject:  MOD_JK.SO   
>   
>   Please respond to  
>   
>   "Tomcat Users  
>   
>   List"  
>   
>  
>   
>  
>   
> 
> 
> 
> 
> 
> Hi,
> 
> We are trying to get Tomcat 4.1.12 and Apache 1 3 26 working together using
> mod_jk.so.
> 
> We are receiving the followitng error :
> 
> Starting httpd: Syntax error on line 224 of /etc/httpd/conf/httpd.conf:
> Cannot load /usr/local/apache/libexec/mod_jk.so into server:
> /usr/local/apache/libexec/mod_jk.so:
>  undefined symbol: ap_ctx_get
> 
> Never done this before, and im probably just plain wrong !
> 
> Any replys would be apperciated,
> 
> Cheers,
> 
> M
> 
> Mehdi Nejad - Senior Developer
> [EMAIL PROTECTED]
> ~~
> Bluewave Ltd - Online Creations
> http://www.bluewave.com
> Tel. +44 (0)20 7479 8394
> ~~
> 
> 
> 
>   "Jordi Guijarro"
> 
><[EMAIL PROTECTED]>
>   ab.es>   cc:
> 
>Subject:  Run Tomcat 4.1.2
> on Novell
>   29/10/2002 17:38
> 
>   Please respond to
> 
>   "Tomcat Users
> 
>   List"
> 
> 
> 
> 
> 
> 
> 
> Hi,
> 
> How can I run Tomcat 4.1.2 on Novell Netware 5.1 ¿?  Nowadays I've a
> script (ncf file)  to start catalina in Tomcat 4.0.4 version. This
> script is not included in Tomcat 4.1.2. Someone knows about it ?
> 
> Thank you,
> 
> Jordi
> 
> 
> 
> 
> 
> 
> --
> To unsubscribe, e-mail:   <
> mailto:tomcat-user-unsubscribe@;jakarta.apache.org>
> For additional commands, e-mail: <
> mailto:tomcat-user-help@;jakarta.apache.org>
> 
> 
> 
> 
> 
> 
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Re: Custom Error Page Issue

[Ben Ricker]

On Wed, 2002-10-30 at 12:57, Jaimes Blunt wrote:
> Hey Guys,
>  
> I am trying to create a custom error page for my webapps, and I am encountering the 
>following message when I try to force an error.
> Error page location myerror.jsp must start with a /

Just as it says: you must begin the  with a '/'.

Ben Ricker
Wellinx.com

> My webapp file has the following included:
>  
>404
>myerror.jsp
>  
>  
>400
>myerror.jsp
>  
>  
>200
>myerror.jsp
>  
> 
> Any ideas?
> 
> Jaimes Blunt 
> 



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Re: Will Upgrade from one cpu to Dual CPU benefit tomcat 3.2.4 ?

[Ben Ricker]

I find that with databases in general, and MySQl in particular, that you
CPU is bound up in a io wait state, that is, waiting for disk reads
and/or writes. You may be disk bound. In that case, adding another CPU
will only give you nominal improvement.

You would need to check to see if I/O is the issue by checking the I/O
wait states and see if the kernel is just blocking the CPU waiting for
disk read/writes. If so, are you using SCSI? IDE? Got RAID? Striping
will improve the situation, as well as turning off mirroring disks, if
you have that setup.

Ben Ricker
Wellinx.com

On Fri, 2002-11-01 at 14:50, Brandon Cruz wrote:
> 
> I have an overloaded linux server running Apache>Tomcat 3.2.4>MySQL.  It has
> 512MB Ram, which seems to be doing fine, but the 1Ghz CPU being used by
> Tomcat is constantly 35-60%.  Before I spend the money, does tomcat take
> advantage of multiple processors, and will it help me to upgrade to a Dual
> 1Ghz CPU machine?
> 
> Brandon
> 
> 
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Re: Access log - single file, or multi day files

[Ben Ricker]

How about running a merge? Someone on the Apache list mentioned that 
Multisort http://www.xach.com/multisort/  it's a nice tool for merging
logs.Would help in archiving also: merge, then compress, then backup.

Ben Ricker
Wellinx.com

On Thu, 2002-11-07 at 07:13, neal wrote:
> My ISP admin is setting up an app to consume and interperet my log files.
> He asked if I can have Tomcat spit out a single log file rather than
> breaking it up day by day but I am hesistent.  To me it seems like a bad
> idea. First, I guess depending upon how Tomcat appends the file, couldn't it
> start to slow down as the file exponentially grows? Second, if there's any
> bad data it could throw of the whole log history, not just a single day.
> Third, if the file was to be damaged same thing. Fourth, it seems pruning
> the old data wouldn't be as easy.
> 
> But he seems to feel this would make setting up that app a lot easier.  I
> don't know.  Does anyone have any opinion in this regard?
> 
> Also, how do you have it write to a single file?  Is there some timestamp
> attribute I can set?  I didn't see one?
> 
> Thanks.
> Neal
> 
> 
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Error in mod_jk.log

[Ben Ricker]

I see the following error logged into the mod_jk log intermittently. I
do not get any calls or anything like that, but I am wonderign what the
error is saying? Anyone have any idea Here is the error:

[jk_ajp_common.c (961)]: Error ajp_process_callback - write failed


Thanks,

Ben Ricker
Wellinx.com



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mod_jk error and Header dumping

[Ben Ricker]

I am running using Apache 1.2.6 talking to two Tomcat 4.0.5 (I think
that is the version number; how do you verify it? The Tomcat default
page comes up with just '4.0') listening on two separate ports. 

I am seeing a strange problem. We have a customized web application
which we run through Tomcat. In one particular module, we have an issue:
on several pages sent from Apache, there is HTTP protocol header
information displayed at the top of the page. Here is some text from it:

"HTTP/1.1 200 OK Date: Yue, 19 Nov 2002 22:31:05 GMT Server:
Apache/1.3.26 (Unix) mod_jk/1.2 Keep-Alive:..."

At roughly the same time we get that text on the client's screen, we see
the following logged to mod_jk.log:

[Wed Nov 20 09:06:38 2002]  [jk_ajp_common.c (679)]: ajp_connection_tcp_get_message: 
Error - jk_tcp_socket_recvfull failed
[Wed Nov 20 09:06:38 2002]  [jk_ajp_common.c (1041)]: Error reading reply
[Wed Nov 20 09:06:38 2002]  [jk_ajp_common.c (1178)]: In jk_endpoint_t::service, 
ajp_get_reply failed in send loop 0

I cannot verify that the error thrown in mod_jk is exactly correlated
with the dumping of the strange text on the screen, but it does look
like it happens at the roughly the same time (within 3 minutes or so).

Any guidance would be appreciated.

Ben Ricker
Wellinx.com


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Re: Tomcat Newsgroup?

[Ben Ricker]

No need for a newsgroup. Just go to:

http://mikal.org/interests/java/tomcat/index.js

for complete, searchable archives of Tomcat (and a mighty fast one too).

Ben Ricker
Wellinx.com

On Wed, 2002-11-20 at 14:41, Daniel Hellstrand wrote:
> A newsgroup would be great.. I´m surprised there isn´t one already...
> 
> /Dan
> 
> David White wrote:
> 
> > Just curious, since this mailing list gets so much traffic, is there any
> > desire to create a newsgroup instead?  It would be great to be able to
> > search old posts using a newsreader or google groups.
> >
> > cheers,
> > David White
> >
> > -Original Message-
> > From: David Wall [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, November 20, 2002 10:25 AM
> > To: Tomcat Users List
> > Subject: Tomcat List Duplicates?
> >
> > Is anybody else getting duplicate emails from the Tomcat list?  I not only
> > seem to get duplicates, but I even get messages that I'm sure I saw
> > yesterday arrive again today (such as my own postings).
> >
> > David
> >
> > --
> > To unsubscribe, e-mail:
> > <mailto:[EMAIL PROTECTED]>
> > For additional commands, e-mail:
> > <mailto:[EMAIL PROTECTED]>
> 
> 
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jk1.2 load-balancing help needed

[Ben Ricker]

I am running a web application that has 2 Apache instances listening on
4 total interfaces (to account for NIC failure) using mod_jk to
load-balance across 4 tomcat instances.I have two boxes with two tomcats
on each box listening on seprate interfaces (again, for Nic failure).

Apache is version 1.3.27 with mod_jk 1.2. Tomcat is version 4.0.6.

Picture it like this:

Apache 1Apache 2
--  --
+ Apache +  + Apache +
+ mod_jk +  + mod_jk +
--  --

Java Server 1   Java Server 2
--  --
+ Tomcat 1   +  + Tomcat 3   +
+ Tomcat 2   +  + Tomcat 4   +
--  --

We ran into a production issue due to a hung query that was run a number
of times. It caused a number of users to get hung requests. They were
able to fix the problem by restarting their browser.

What normally happens is that our load is such that Tomcat1 gets almost
all the requests. When Tomcat1 gets too busy (all the ajp13 processors
are full and a new session is requested, the request gets routed to
Tomcat2, and so on for Tomcat 2, 3, and 4. Because our load is low right
now, we never get requests to Tomcats 3 and 4.

However, once a hung query started eating up database (and therfore,
AJP13 connections which were waiting for the DB to return) the new
connections got routed to the other Tomcats. Tomcat failed over,
basically.

This leads me to my request: I would like to do true round-robin
load-balancing on all four tomcats to minimize the impact of problems
like we just saw. Since all connections are normally handled by Tomcats
1 and 2, a problem that occurs in Tomcats 1 and 2 has an effect on amost
all the users. However, if the users were round-robin load-balanced and
Tomcat 1 hit the bad query enough to hose all its connections it had,
only those in Tomcat1 would be affected; the ones in Tomcats 2,3, and 4
would be unaffected.

How can one change the weights to get new request, round-robin
load-balancing from mod_jk?

Does this make sense to anyone? I checked the connectors documentation,
but nothing explains why Tomcat1 gets all the new connections. It
appears to me that round-robin is not working?

Here is my workers.properties file. it is identical on both Apache
servers:

--Begin workers.properties
#
# workers.properties
#

# In Unix, we use forward slashes:
ps=/

# list the workers by name

worker.list=tomcat1,tomcat2,tomcat3,tomcat4,loadbalancer

# 
# First tomcat server
# 
worker.tomcat1.port=11009
worker.tomcat1.host=10.1.2.45
worker.tomcat1.type=ajp13

# Specify the size of the open connection cache.
#worker.tomcat1.cachesize

#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
#  > lbfactor must be > 0
#  > Low lbfactor means less work done by the worker.
worker.tomcat1.lbfactor=100


# 
# Second tomcat server
# 
worker.tomcat2.port=12009
worker.tomcat2.host=10.1.2.145
worker.tomcat2.type=ajp13

# Specify the size of the open connection cache.
#worker.tomcat2.cachesize

#
# Specifies the load balance factor when used with
# a load balancing worker.# Note:
#  > lbfactor must be > 0
#  > Low lbfactor means less work done by the worker.
worker.tomcat2.lbfactor=100

# 
# Third tomcat server
# 
worker.tomcat3.port=11009
worker.tomcat3.host=10.1.2.12
worker.tomcat3.type=ajp13

# Specify the size of the open connection cache.
#worker.tomcat2.cachesize

#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
#  > lbfactor must be > 0
#  > Low lbfactor means less work done by the worker.
worker.tomcat2.lbfactor=100

# 
# Fourth tomcat server
# 
worker.tomcat4.port=12009
worker.tomcat4.host=10.1.2.112
worker.tomcat4.type=ajp13

# Specify the size of the open connection cache.
#worker.tomcat2.cachesize

#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
#  > lbfactor must be > 0
#  > Low lbfactor means less work done by the worker.
worker.tomcat2.lbfactor=100
# 
# Load Balancer worker
# 
#
# The loadbalancer (type lb) worker performs weighted round-robin
# load balancing with sticky sessions.
# Note:
#  > If a worker dies, the load balancer will check its state
#once in a while. Until then all work is redirected to peer
#worker.
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=tomcat1,tomcat2,tomcat3,tomcat4

#
# END workers.properties
#








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Re: urgent - servlet not found.

[Ben Ricker]

On Thu, 2002-11-21 at 13:50, Triptpal Singh Lamba wrote:
> This has taken too long so someone pls see if you can help me.
> 
> My form in index.jsp says
> 
> 
> 
> If index.jsp can find the servlet ,my job is done.
> 
> My web.xml has defined this in WEB-INF
> 
> webapps/osp  // context  = osp
> 
> in osp I have a WEB-INF which has web.xml with only this entry
> 
> 
>   Router
>   com.osp.servlet.Router
> 1
> 
> 
> index.jsp is coming up , server.xml has the context entry.
> What should the action be changed to ??

Looks like the idex.jsp should be changed to:


 
You might also need to add a '/' in front of 'servlet', depending on how
you set up your server.xml.

The '' directive tells Tomcat what alias to give to the
''. You could do the full path, but looks better to the
client to use the alias.

Ben Ricker
Wellinx.com


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Error message meaning?

[Ben Ricker]

I am using mod_jk 1.2 with Apache 1.2.27 talking with 4 Tomcat 4.0.6
instances.

Every once in while, I get tthe following error logged to mod_jk:

[jk_ajp_common.c (961)]: Error ajp_process_callback - write failed

What exactly does this mean? Is it that mod_jk had an error writing to
the stream to Tomcat? If so, does it retry the request it sent? How does
one know it was successful? Also, this occurs fairly rarely and
intermittently. Out of 26,000 requests, I see it 70 times on one day.

Thanks,

Ben Ricker
Wellinx.com




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Sun JDK 1.4 production quality?

[Ben Ricker]

I have heard a number of differing opinions about the stability of 1.4.x
version of Sun's JDK. I wanted to see if anyone runs Tomcat using 1.4.x
and how they have found its stability, speed, etc. 

I know there have been a number of enhancements in 1.4 which sound
intriguing; additionally, its jdbc driver fixes a bug that is curretnly
vexing us. Our Tomcat installation gets roughly 25,000 hits a day; if
you can include an approximate idea of how many hits your app takes,
this information would be helpful.

I would, of course, test this with load testing, but the management here
seems to think we do not need it*sigh*

Thanks,

Ben Ricker




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Meaning of mod_jk.log times

[Ben Ricker]

I see a lot of msgs logged to mod_jk.log on the Apache servers we have
setup using mod_jk 1.2 (with Apache 1.3.27). It is talking to 4 Tomcat
instances running Tomcat 4.0.6.

I am wondering what exactly the time stamped at the end of the line says
exactly:

[Fri Nov 22 14:42:36 2002] loadbalancer web2.wellinx.com 0.018557

Namely, the "0.18557".I am assuming it is the amount of time it takes
the transaction from when mod_jk makes the request to Tomcat to when it
gets that info back.

Also, notice the "web2.wellinx.com"; that is the ServerName from the
Apache server. Is there a way to actually log the Tomcat instance the
request is going to? I know what Apache server I am looking at when I am
reading the lod, so the information there seems rather trivial.

Thanks,

Ben Ricker
Wellinx.com




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Does web.xml inherit?

[Ben Ricker]

I am running Tomcat 4.0.6 on Solaris. We are getting complaints of
session timeouts from users. Looking around I found the "Default Session
Configuration" section of the web.xml in the /conf directory. The app is
in its own context defined by its own web.xml.

So my question is: does the web.xml inherit the values from the web.xml
in the /conf directory (let us call it the "main" web.xml)? Or are the
default values listed in the main web.xml the default values for ALL
other contexts if they are not explicitely changed in the other
contexts?

Thanks,

Ben Ricker
Wellinx.com




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RE: Does web.xml inherit?

[Ben Ricker]

On Tue, 2002-11-26 at 04:19, Roberts, Eric wrote:
> As far as I know the sequence is:
> 
> Default Context
> App Context
> /conf/web.xml
> /WEB-INF/web.xml
> 
> So your /WEB-INF/web.xml has the final say, provided that overrides to the previous 
>settings have been allowed.

Actually, we found that this is not correct. The "Default Session
Configuration" section is only definable in the /conf/web.xml. We tried
putting it into the /WEB_INF/web.xml and it did nothing to change the
session timeout.

I did not try removing the session timeout parameter, however. Anyway,
at least for the session parameters, the /conf/web.xml has the final
say.

Thanks for the help,

Ben Ricker
Wellinx.com

 
> -Original Message-
> From: Ben Ricker [mailto:[EMAIL PROTECTED]]
> Sent: Montag, 25. November 2002 23:24
> To: Tomcat Users List
> Subject: Does web.xml inherit?
> 
> 
> I am running Tomcat 4.0.6 on Solaris. We are getting complaints of
> session timeouts from users. Looking around I found the "Default Session
> Configuration" section of the web.xml in the /conf directory. The app is
> in its own context defined by its own web.xml.
> 
> So my question is: does the web.xml inherit the values from the web.xml
> in the /conf directory (let us call it the "main" web.xml)? Or are the
> default values listed in the main web.xml the default values for ALL
> other contexts if they are not explicitely changed in the other
> contexts?
> 
> Thanks,
> 
> Ben Ricker
> Wellinx.com
> 
> 
> 
> 
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RE: Does web.xml inherit?

[Ben Ricker]

On Tue, 2002-11-26 at 09:01, [EMAIL PROTECTED] wrote:
> hey i am facing they same problem
> sometime we are facing session  time outs
> in spite of me setting  session to never expire on first jsp page
>  session.setMaxInactiveInterval (-1);
> DO U THINK I SHOULD CHANGE THIS Conf/web.xml

Possibly. Timeouts can be a tricky business because of all the issues
involved. In conf/web.xml there is a session properties where the
default session timeout is 30 minutes. If that is not long enouhg, you
can change it there. It does work; we tested it thoroughly (setting it
to one minute, 30 minutes, and 60 minutes. It worked).

Ben Ricker
Wellinx.com
 
> 
> -Original Message-----
> From: Ben Ricker [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, November 26, 2002 9:49 AM
> To: Tomcat Users List
> Subject: RE: Does web.xml inherit?
> 
> 
> On Tue, 2002-11-26 at 04:19, Roberts, Eric wrote:
> > As far as I know the sequence is:
> > 
> > Default Context
> > App Context
> > /conf/web.xml
> > /WEB-INF/web.xml
> > 
> > So your /WEB-INF/web.xml has the final say, provided that overrides to the
> previous settings have been allowed.
> 
> Actually, we found that this is not correct. The "Default Session
> Configuration" section is only definable in the /conf/web.xml. We tried
> putting it into the /WEB_INF/web.xml and it did nothing to change the
> session timeout.
> 
> I did not try removing the session timeout parameter, however. Anyway,
> at least for the session parameters, the /conf/web.xml has the final
> say.
> 
> Thanks for the help,
> 
> Ben Ricker
> Wellinx.com
> 
>  
> > -Original Message-
> > From: Ben Ricker [mailto:[EMAIL PROTECTED]]
> > Sent: Montag, 25. November 2002 23:24
> > To: Tomcat Users List
> > Subject: Does web.xml inherit?
> > 
> > 
> > I am running Tomcat 4.0.6 on Solaris. We are getting complaints of
> > session timeouts from users. Looking around I found the "Default Session
> > Configuration" section of the web.xml in the /conf directory. The app is
> > in its own context defined by its own web.xml.
> > 
> > So my question is: does the web.xml inherit the values from the web.xml
> > in the /conf directory (let us call it the "main" web.xml)? Or are the
> > default values listed in the main web.xml the default values for ALL
> > other contexts if they are not explicitely changed in the other
> > contexts?
> > 
> > Thanks,
> > 
> > Ben Ricker
> > Wellinx.com
> > 
> > 
> > 
> > 
> > --
> > To unsubscribe, e-mail:
> <mailto:[EMAIL PROTECTED]>
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> > 
> > 
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> > 
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> 
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RE: Thread dump

[Ben Ricker]

I am intrigued by this feature; it would help with the debugging of a
application. I tried to test it against tomcat but I get nothing on
stderr (i.e., nothing in /var/log/messages, terminal, directory I am in,
catalina.out, or any of the logs for Tomcat).

Could you expand on what behavior you see when you send the -3 to
Tomcat's PID?

Thanks,

Ben Ricker
Wellinx.com

On Fri, 2002-12-06 at 12:29, Schnitzer, Jeff wrote:
> FYI, no it doesn't, it just causes the (Sun, at least) JVM to dump a
> list of threads and their stacks to stderr.  Note that it's the real
> stderr, not System.err.  This is a JVM feature.  It can be done anytime
> and is a *really* useful debugging feature.
> 
> Jeff
> 
> > -Original Message-
> > From: Manavendra Gupta [mailto:[EMAIL PROTECTED]]
> > Sent: Friday, December 06, 2002 8:01 AM
> > To: Tomcat Users List
> > Subject: RE: Thread dump
> > 
> > Beg your pardon? would that not actually kill the process, rather than
> > displaying the thread dump?
> > 
> > And what if one wants to see the thread dump right from the moment
> tomcat
> > starts up?
> > 
> > Thanks,
> > manav.
> > 
> > -Original Message-
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > Sent: Friday, December 06, 2002 9:18 PM
> > To: Tomcat Users List
> > Subject: Re: Thread dump
> > 
> > 
> > 
> > kill -3 
> > 
> > RS
> > 
> > 
> > 
> >   "Manavendra
> >   Gupta"   To:   "Tomcat Users
> > List"
> >   <[EMAIL PROTECTED]>
> > <[EMAIL PROTECTED]>
> >cc:
> >   12/06/02 09:53 AMSubject:  Thread dump
> >   Please respond to
> >   "Tomcat Users
> >   List"
> > 
> > 
> > 
> > 
> > 
> > 
> > I have tomcat 4.1 running on Linux. How do i see the thread dump? The
> > startup.sh on linux just starts it in the background, while i could
> use
> > startup.bat on windows and get the thread dump.
> > 
> > thanks,
> > manav.
> > 
> > 
> > --
> > To unsubscribe, e-mail:   <
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> > 
> > 
> > 
> > 
> > 
> > 
> > 
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Problem with Tomcat 4

[Ben Ricker]

I have a installation of Apache/Tomcat which is working...sort of.

I have everything configured according to the snippets I will post
below. Here is the strangeness: I initially configured Tomcat as
standalone and was able to pull up the servlet app perfectly well.
Everything performed as expected. Now when I call the URL mapped to
Tomcat, I get a blank, well-formed HTML page! That is
''.

My pertinent configs are below. I setup the workers.properties as
loadbalanced because I could only find a complete config in this form.

--First, My httpd.conf stuff--

# Mod_jk configuration
LoadModulejk_module  libexec/mod_jk.so
AddModule mod_jk.c
JkWorkersFile /usr/local/apache/conf/workers.properties
JkLogFile /usr/local/apache/logs/mod_jk.log
JkLogLevelinfo
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkMount /servlets/* loadbalancer
JkMount /*.jsp loadbalancer

--Next,my workers.properties--

# Using Single Tomcat Instance using AJPV13
#
#workers.tomcat_home=/usr/local/tomcat
#workers.java_home=/usr/local/jdk
ps=/
worker.list=tomcat1, loadbalancer

# Definition for Ajp13 worker (Ajp12 left to readers imagination)
#
worker.tomcat1.port=8009
worker.tomcat1.host=remotehost.wellinx.com
worker.tomcat1.type=ajp13

# Specifies the load balance factor when used with a load balanced
# worker
#
# Note:
# -> lbfactor must be > 0
# -> The lower the lbfactor the less work done by worker
worker.tomcat1.lbfactor=100

# 
# Load Balancer worker
# 

#
# The loadbalancer (type lb) worker performs weighted round-robin
# load balancing with sticky sessions.
# Note:
#  > If a worker dies, the load balancer will check its state
#once in a while. Until then all work is redirected to peer
#worker.
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=tomcat1

#
# END workers.properties
#

--Finally, my server.xml stuff--






   

 


Any ideas why I get a blank page? The logs show that the connection is
being made from the apache server to the java server through port 8009.
Debugging showed that the request was received and finished by Tomcat,
but the response was the blank page.

Thanks!

Ben Ricker
Web Security System Administrator
Wellinx.com



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Re: Installation on Linux

[Ben Ricker]

You need mod_jk or mod_webapp in order to hava Apache forward servlet
requests to Tomcat.

The major difference between mod_jk and mod_webapp is that mod_jk allows
for load balancing over multiple Tomcat instances while mod_webapp does
not. I hava also heard that mod_webapp should have that capability
(soon?) but does not have it now.

I have heard of people using Apache 2.x with Tomcat, but I have not done
that myself.

Ben Ricker
Web Security System Administrator
Wellinx.com


On Wed, 2002-06-05 at 08:53, Iain Downie wrote:
> Want to upgrade from Tomcat 3.3 to 4.0 (been told it is easier to administer
> etc. etc. and has the manager web application) on a Linux (redhat7.2)
> server, working as a add-on to Apache. Bit confused by the download.
> 
> I will be getting 'jakarta-tomcat-4.0.3.tar.gz' at
> http://jakarta.apache.org/builds/jakarta-tomcat-4.0/release/v4.0.3/bin/. No
> problems there.
> 
> However, do I need any additional Linux extensions? When I click into
> http://jakarta.apache.org/builds/jakarta-tomcat-4.0/release/v4.0.3/bin/linux
> /i386, I see a warning file saying Only for Apache 1.3.
> 
> Can someone confirm that this is indeed the case, or should I also get the
> mod_jk-01.so module too? Do I need the mod_webapp.so?
> 
> Regards, any help much appreciated
> Iain
> 
> 
> 
> 
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Re: Other question

[Ben Ricker]

On Solaris, you can use 'pgrep' which will return the PID based upon a
grep. Do a man on it; it has saved my bacon when writing process
monitors.

Ben Ricker
Web Security System Administrator
Wellinx.com


On Fri, 2002-06-14 at 11:05, Laura wrote:
> On linux,
> 
> ps -ef | grep java | grep myapp | awk '{print $1}'
> 
> I'm trying it.
> 
> Laura
> 
> 
> Alle 17:59, venerdì 14 giugno 2002, hai scritto:
> > Hi,
> > Yepp, you're right ;)  Forgot that part.  For us on Solaris 2.8 it's
> > ps -ef | grep java | grep myapp | awk '{print $2}'
> >
> > Yoav Shapira
> > Millennium ChemInformatics
> >
> > >-Original Message-
> >
> > From: Turner, John [mailto:[EMAIL PROTECTED]]
> >
> > >Sent: Friday, June 14, 2002 11:41 AM
> > >To: 'Tomcat Users List'
> > >Subject: RE: Other question
> > >
> > >
> > >Just for clarification, doing "> tomcat.pid" wouldn't really work, because
> > >all you would get is the ps entry for that value.  You'd have to use cut
> > > or awk and grab the actual PID from the PID column in the listing that
> > > resulted
> > >from "ps -ef | grep java | grep myapp"  and redirect it to tomcat.pid.
> > >
> > >John Turner
> > >[EMAIL PROTECTED]
> > >http://www.aas.com
> > >
> > >-Original Message-
> >
> > From: Shapira, Yoav [mailto:[EMAIL PROTECTED]]
> >
> > >Sent: Friday, June 14, 2002 10:45 AM
> > >To: Tomcat Users List
> > >Subject: RE: Other question
> > >
> > >
> > >Howdy,
> > >A relatively unix-flavor-independent way to do it is to give your process
> > >an
> > >identifier via the first argument, i.e. the first thing in CATALINA_OPTS,
> > >for example -Da=myapp.
> > >
> > >You would then do ps -ef | grep java | grep myapp > tomcat.pid.
> > >
> > >Yoav Shapira
> > >Millennium ChemInformatics
> > >
> > >>-Original Message-
> > >>From: Ralph Einfeldt [mailto:[EMAIL PROTECTED]]
> > >>Sent: Friday, June 14, 2002 10:41 AM
> > >>To: Tomcat Users List
> > >>Subject: AW: Other question
> > >>
> > >>What operating system do you have ?
> > >>
> > >>> -Ursprüngliche Nachricht-
> > >>> Von: Laura [mailto:[EMAIL PROTECTED]]
> > >>> Gesendet: Freitag, 14. Juni 2002 13:59
> > >>> An: Tomcat Users List
> > >>> Betreff: Re: Other question
> > >>>
> > >>>
> > >>> But it doesn't seem to be correct. It writes in tomcat.pid a
> > >>> PID that doesn't  seem to be correct: I have tried to do:
> > >>>
> > >>> kill -9 PID (which is in the tomcat.pid)
> > >>>
> > >>> and the system tells me:
> > >>
> > >>--
> > >>To unsubscribe, e-mail:   <mailto:tomcat-user-
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> > >>For additional commands, e-mail: <mailto:tomcat-user-
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> > >
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Re: distributed environment

[Ben Ricker]

On Tue, 2002-06-25 at 20:15, David Mossakowski wrote:

> My questions about this:
> 1. I'm assuming that with a single Apache server that it has mutltiple 
> Tomcat servers that it balances across therefore knowing which session 
> to send where but how is a "sticky" session achieved with mutliple 
> Apache instances? The last sentence suggests this is possible.

I cannot speak for Tomcat, but if I am not mistaken, it works as Jserv
does for load-balancing.

Anyway, the session id is written to the cookie that is presented to
Apache, which passes it to the Jserv/Tomcat connector. When
load-balancing, the Jserv/Tomcat connector knows which Tomcat instance
(i.e., IP and port) to send the request until that session is ended.
 
> 2. Is using a single Apache server serving across multiple Tomcats and 
> having another Apache server connected to the same Tomcats as a standby 
> if the first goes down an effective solution for high availability?

Not the most effective. If you have some sort of load-balancer (i.e.,
proxy server, dedicated load-balancer, DNS, etc), you can use BOTH
Apache's which receive requests and forward them to the correct
instance. If an Apache goes down, the other one will take over and the
user will see know problems (unless the load across two Apaches would
kill one Apache).

> I'm not too concerned with migrating sessions or session failover as 
> long as a session is continued (meaning the request goes to the same 
> Tomcat instance).  Currently I'm looking into persistent storage on a 
> database but I worry it's too costly (timewise).

There is a caveat: if a Tomcat instance fails, all sessions on that
instance will fail at the next request since the cookie will still point
to it. At the next request, they will get a "session time-out" or
whatever you do when they first initiate the session (i.e., a login
screen).

 
> -- Bottom Line --
> Please let me know what can I expect from Apache/Tomcat combination in a 
> distributed environment without going the EJB, big-ass-expensive 
> application server route.

Most app servers do session failover, so they will be better. I also
have seen a way to do session failover using a JVM-to-JVM socket
connection which passes session information between JVMs. Have not tried
it myself.


Ben Ricker
Web Security System Administrator
Wellinx.com


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Tomcat 4.1.3 beta - Admin Interface

[Ben Ricker]

Is there any documentation on the Admin interface? I ran into any number
of error messages...am I to assume that it more beta then everything
else?

Thanks,

Ben Ricker
Web Security System Administrator
Wellinx.com


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Re: tomcat.log

[Ben Ricker]

You want to turn down the logging level in the server.xml file; if it is 
info, change it to 'warn'. Also, you could use logrotate running at a 
certain time frame to watch the log for a specific size and then "roll 
it". I am not sure what issues this raises with Tomcat alone. With 
apache, you have to HUP it (on Unix).

Ben Ricker
System Administrator
Wellinx.com

Georges Boutros wrote:

> hi,
> 
> i'm testing the durability of tomcat under a heavy attack of users ,
> 
> i got a problem with the tomcat.log and jasper.log , those 2 files got so
> big they took all the available space on my harddisk
> 
> which have failed my test.
> 
> 
> does anyone know how to manage the log files not to get so big.
> 
> thanks
> 
> Georges
> 
> 

Servlet Aliases

[Ben Ricker]

I have a servlet based web app I am trying to migrate from Apache/Jserv 
to Tomcat and I am having a bit of a problem. I can access the index 
page I placed in the war file, but everytime I try to call a servlet, 
either from package name or alias, I get a NOT FOUND (404) error. I have 
not been able to verify that it is loading the servlets correctly or not 
(I have turned all logging up to debug and cannot find anything in the 
admin web app that tells me).

I have a war file containing the WEB-INF directory which contains 
classes, lib, and the web.xml file. In the web.xml file we have listed 
all of the servlet aliases used throughout the application (they were in 
the servlets.properties file of Jserv). Inside of the lib file is the 
jar file. Here is the structure of the aliase spec in the web.xml file:


   
 ServletAlias
   
   
 path.to-package.servletname
   


What am I missing here?

Ben Ricker
Senior Web Administrator
US-Rx, Inc.   


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Re: How do I rotate logs for Tomcat?

[Ben Ricker]

I would use logrotate.d which comes with most, if not all, Unix 
variants. Type 'man logrotate' for more info. I am not sure if there are 
any problems with processing a log file while Tomcat is still running, 
though. Can someone else speak to that issue with Tomcat?

Frank Signorelli wrote:

> Hi all,
> 
> To prevent logfiles from growing without bound, Apache uses
> the rotatelogs command with the TransferLog directive in
> httpd.conf.
> 
> What is the preferred method for rotating log files from
> Tomcat?
> 
> Thanks in advance for any advice.
> 
> 
> Frank
> ---
> Frank L. Signorelli   
> Senior Member of Tech. Staff  Telesciences, Inc.
> Telephone: +1.866.1000 x3207  2000 Midlantic Drive
>   Suite 410
>   Mt Laurel, NJ 08054 
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Re: How to setProperty with checkbox group

[Ben Ricker]

Hey! Are you seeing other admins behind my back!!

Heh...actually, a small clarification: I am using 1.3 for Tomcat. I 
thought we might as well upgrade to the latest and the greatest for the 
Tomcat install.

Ben

Carl Bacher wrote:

> Actually, on NT I'm using jdk1.3 and on Linux I'm using 1.2.2. Maybe that's the 
>difference.
> 
> I did manage to get it to work by using the Request object and setting it explicitly
> <%
>String[] selectedItems = request.getParameterValues("selectedItems");
>myBean.setSelectedItems(selectedItems);
> %>
> 
> Thanks, Carl
> 
> Stefan Langer wrote:
> 
>> I really have no idea why it doesn't work in Linux. Btw which SDK are you using on 
>NT and which on Linux??
>> BUt here a suggestion:
>> Try putting the setProperty tag inside the useBean tag.
>> Something like this
>> 
>> 
>> 
>> 
>> 
>> Might work.
>> 
>> hope that helps
>> 
>> Stefan
> 
> 
> 
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Re: Why use apache

[Ben Ricker]

As the "minimalist" manual says, Apache should be used when serving a 
heavy load of static content as well as the dynamic java content. Apache 
is MUCH more extensible, scalable, and robust of a http daemon then 
Tomcat's built-in http server.

Ben Ricker
Senior Web Administrator
US-Rx, Inc.

Cybercity_Egen wrote:

> Hi, I am new at tomcat.
> 
> Why use Apache with tomcat, is it not enough just to use Tomcat. It
> works for me, but will it be a problem if i get high traffic on my
> server, or is there any other disadvanteges?
> 
> Thanks
> Jimmy
>mailto:[EMAIL PROTECTED]
> 
> 
> 
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Re: Why use apache

[Ben Ricker]

You would probably want to switch to a Perl script using the Net::http 
module which includes a 'get' command which will rquest a URL and then 
parse the response code to trigger the restart script.

Ben Ricker
Senior Web Administrator
US-Rx, Inc.

Randy Layman wrote:

>   The only real way that I could think to do this (would looking into
> the AJP12 and AJP13 specs) is to do a program/script thing that would:
>   while (true) {
>   request http://localhost:8080
>   if request not valid
>   tomcat start
>   }
> 
>   It doesn't seem like it would be all that difficult.  Doing it in a
> shell script might be a little tricky.  (Can you make lynx get only one page
> and return an error code if the URL is not responding?)
> 
>   Just a few thoughts.
> 
>   Randy
> 
> -Original Message-
> From: Dennis Doubleday [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, February 01, 2001 3:57 PM
> To: [EMAIL PROTECTED]
> Subject: RE: Why use apache
> 
> 
> At 03:06 PM 2/1/01, you wrote:
> 
>> So, the answer is it really depends.  Look at your usage patterns
> 
> -
> 
>> if its almost exclusively Tomcat-served dynamic content then go with just
>> Tomcat.  If its mostly static with a few dynamic pages the go with Apache
>> and Tomcat.  If its in between, experiment and test to determine what's
> 
> best
> 
>> for your application.
> 
> 
> My Apache/Jserv app serves only dynamic requests, but I continue to front 
> it with Apache because Apache will restart Jserv if it dies (if started in 
> automatic mode.) I have thought of switching to Tomcat standalone, but is 
> there a way to replace that restart-on-failure feature?
> 
> -
> Dennis Doubleday  email: [EMAIL PROTECTED]
> yourfit.com, Inc.   web: http://www.yourfit.com/
> 
> 
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Re: runaway threads eating cpu cycles on Solaris 7

[Ben Ricker]

This sounds like garbage collection by the JVM. I know there is a way to
control when the JVM garbage collects, but I amnot sure how. Anybody
else know how to do that?

Ben Ricker
Senior System Administrator
US-Rx, Inc.


On 15 Feb 2001 15:43:22 -0500, Kelly Kleinfelder wrote:
> We are running Tomcat 3.2.1 and Solaris 7 on a Sun e250 with 4 400Mhz processors. 
>The problem we're having is that one thread is chewing up the majority of the cpu 
>cycles and sometimes causes tomcat to hang.
> 
> I have included sample mpstat data and the output from ps -L -p PID:
> 
> ps -L -p 26361
>PID   LWP TTY LTIME CMD
>  26361 1 ?0:03 java
>  2636122 ?1:02 java
>  2636123 ?   40:57 java
>  2636124 ?1:43 java
>  2636126 ?0:09 java
>  2636167 ?0:03 java
>  (24 entries deleted for brevity. All were at 0:00 LTIME)
> 
> mpstat 30
> CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
>   0   12   0   12 64   170100750   3   1  96
>   16   06 41   14300052   59   1   1  39
>   20   0064   62   12200020   41   1   1  57
>   34   0   14   2033   270100260   0   0 100
> CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
>   00   01 32   160110511   3   1  95
>   10   00 5164000 3   81   0   0  19
>   20   0219   19   170100160   0   0 100
>   34   0   13   2022   15110041   19   2   0  78
> CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
>   04   05 55   170110701   2   1  96
>   14   00 51   11400036   84   0   0  15
>   22   0426   26   280100812   0   0  98
>   30   0   20   2044   19100024   14   0   0  86
> 
> Before today, this was happening about every 3 days. Today it happened 5 hours 
>apart. By going through our logs, we have determined that this is not caused by any 
>specific user action. It is also not caused by server load, as it mostly happens with 
>less than 5 users accessing the application. It is also not a gradual thing. Our sar 
>statistics show that our processor idle time is 98% and then 5 minutes later it's 
>down to 83% and in another 5 minutes, it's at 49%.
> 
> Is there any way that I can tell exactly what is happening in the offending thread?
> 
> Any other ideas on what's causing this problem?
> 
> Thanks,
> Kelly


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RE: I don´t understand the objective of thisopen list !

[Ben Ricker]

My advice: don't use it. We "geeks" who take the time to LEARN about the
technologies we use will go about our business, using Tomcat. If you do
not like it, please find another list to flame-bait on.

Btw, I am running an App that has roughly 20k hits per day using a 99%
dynamically generated web app (this is a rather small web app compared
to others out there on the list) and I rely on it in a "life or death
situation" (i.e., I get fired if I cannot keep up a 99% uptime
requirement for 24/7/365). Tomcat works perfectly.

Ben Ricker


On Mon, 2002-12-09 at 16:04, Mike DiChiappari wrote:
> You're correct.  There is lots of documentation out there. 
> Unfortunately, it belongs with most things that are open sourse - in 
> the trash.  Jakarata/tomcat is particularly bad.  The people that 
> manage it should be ashamed of themselves (I hope they are not 
> building software I have to rely on in life and death situations).
> 
> Mike
> 
> 
> >I disagree.  There's lots of documentation out there.
> >
> >It's just not blasted into peoples' faces, nor is it bound into a nice
> >little book and shrinkwrapped.  You have to go find it, and you have to read
> >it.  Most people are too lazy to do either, they want everything handed to
> >them.
> >
> >John
> >
> 
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Wellinx.com


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RE: Tomcat examples - reply to Carlos

[Ben Ricker]

; Marking this application
> > unavailable due to previous error(s)
> > 2002-12-07 11:47:30 StandardManager[/examples]:
> > Seeding random number
> > generator
> > class java.security.SecureRandom
> > 2002-12-07 11:47:30 StandardManager[/examples]:
> > Seeding of random number
> > generator has been completed
> > 2002-12-07 11:47:30 StandardContext[/examples]:
> > Context startup failed due
> > to
> > previous errors
> >
> >
> >
> > localhost_admin_log.txt Tells:2002-12-07 11:47:30
> > ContextConfig[/admin]:
> > Marking this application unavailable due to previous
> > error(s)
> > 2002-12-07 11:47:30 StandardManager[/admin]: Seeding
> > random number generator
> > class java.security.SecureRandom
> > 2002-12-07 11:47:30 StandardManager[/admin]: Seeding
> > of random number
> > generator
> > has been completed
> > 2002-12-07 11:47:30 StandardContext[/admin]: Context
> > startup failed due to
> > previous errors
> >
> >
> > and catalina.out Tells:
> >
> > Starting service Tomcat-Standalone
> > Apache Tomcat/4.1.12
> > org.xml.sax.SAXParseException: The string "--" is
> > not permitted within
> > comments.
> > at
> >
> org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException
> > (Unknown Source)
> > at
> >
> org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLScanner.scanComment(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLDTDScannerImpl.scanComment(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLDTDScannerImpl.scanDecls(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLDTDScannerImpl.scanDTDExternalSubset
> > (Unknown Source)
> > at
> >
> org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch
> > (Unknown Source)
> > at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument
> > (Unknown Source)
> > at
> >
> org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
> > Source)
> > at
> >
> org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
> > Source)
> > at
> > org.apache.xerces.parsers.XMLParser.parse(Unknown
> > Source)
> > at
> >
> org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
> > Source)
> > at
> >
> org.apache.commons.digester.Digester.parse(Digester.java:1514)
> > at
> >
> org.apache.catalina.startup.ContextConfig.tldScanStream
> > (ContextConfig.java:977)
> > at
> > org.apache.catalina.startup.ContextConfig.tldScanTld
> > (ContextConfig.java:1006)
> > at
> > org.apache.catalina.startup.ContextConfig.tldScan
> > (ContextConfig.java:870)
> > at org.apache.catalina.startup.ContextConfig.start
> > (ContextConfig.java:647)
> > at
> >
> org.apache.catalina.startup.ContextConfig.lifecycleEvent
> > (ContextConfig.java:243)
> > at
> >
> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent
> > (LifecycleSupport.java:166)
> > at org.apache.catalina.core.StandardContext.start
> > (StandardContext.java:3493)
> > at
> >
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
> > at
> >
> org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
> > at
> >
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
> > at org.apache.catalina.core.StandardEngine.start
> > (StandardEngine.java:347)
> > at org.apache.catalina.core.StandardService.start
> > (StandardService.java:497)
> > at org.apache.catalina.core.StandardServer.start
> > (StandardServer.java:2189)
> > at
> >
> org.apache.catalina.startup.Catalina.start(Catalina.java:510)
> > at
> >
> org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
> > at
> >
> org.apache.catalina.startup.Catalina.process(Catalina.java:180)
> > at java.lang.reflect.Method.invoke(Native Method)
> > at
> >
> org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
> > [ERROR] Digester - -Parse Fatal Error at line 307
> > column 39: The string "--"
> > is
> > not permitted within comments.
> >  > "--"
> > is not permitted within comments.>
> > org.xml.sax.SAXParseException: The string "--" is
> > not permitted within
> > comments.
> > at
> >
> org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException
> > (Unknown Source)
> > at
> >
> org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLScanner.scanComment(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLDTDScannerImpl.scanComment(Unknown
> > Source)
> > at
> >
> org.apache.xerces.impl.XMLDTDScannerImpl.scanDecls(Unknown
> > Source)
> >
> 
> 
> 
> Thank?s for try to help me, and i hope that you can found my problem.
> 
> === message truncated ===
> 
> 
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RE: 4.1.12 dumps VM, any ideas?

[Ben Ricker]

On Tue, 2002-12-10 at 13:54, Shapira, Yoav wrote:
> Hi,
> Damn, I was just about to suggest 1.4.1_01 ;)
> 
> I've had that error happen before on JDK 1.3 on Solaris, not W2K.  The
> problem was I hadn't installed the OS-level patches required by Solaris
> for that JDK version.  So I don't know if this applicable to your
> problem...
> 
> Yoav Shapira
> Millennium ChemInformatics

Just a thought: you can run java without HotSpot and see if it runs. If
it does, then you are probably looking at a bug in HotSpot (THAT never
happens *grin). If it does not, then you are probably looking at a
problem with your system.

HTH,

Ben Ricker

> 
> >-Original Message-
> >From: Will Hartung [mailto:[EMAIL PROTECTED]]
> >Sent: Tuesday, December 10, 2002 2:33 PM
> >To: Tomcat Users List
> >Subject: Re: 4.1.12 dumps VM, any ideas?
> >
> >As a followup, it also kills a JDK 1.4.1_01 JVM as well. :-(
> >
> >Thanx again!
> >
> >Will
> >
> >
> >> Hi All!
> >>
> >> We're just porting our app to 4.1.12. After fighting classpath
> problems,
> >the
> >> latest and greatest is this:
> >>
> >> From the localhost_log file, the last enry was:
> >>
> >> 2002-12-09 14:36:57 StandardWrapper[/myApp:invoker]: Loading
> container
> >> servlet invoker.
> >>
> >> On the stdout/stderr of the tomcat container:
> >>
> >> bin> sh catalina.sh run
> >> Using CATALINA_BASE:   C:\cygwin\tmp\tomcat\jakarta-tomcat-4.1.12
> >> Using CATALINA_HOME:   C:\cygwin\tmp\tomcat\jakarta-tomcat-4.1.12
> >> Using CATALINA_TMPDIR:
> C:\cygwin\tmp\tomcat\jakarta-tomcat-4.1.12\temp
> >> Using JAVA_HOME:   c:\JDK1.3
> >> [INFO] Registry - -Loading registry information
> >> [INFO] Registry - -Creating new Registry instance
> >> [INFO] Registry - -Creating MBeanServer
> >> [INFO] Http11Protocol - -Initializing Coyote HTTP/1.1 on port 8080
> >> Starting service Tomcat-Standalone
> >> Apache Tomcat/4.1.12
> >> #
> >> # HotSpot Virtual Machine Error, Internal Error
> >> # Please report this error at
> >> # http://java.sun.com/cgi-bin/bugreport.cgi
> >> #
> >> # Error ID: 43113F32554E54494D45110E4350500290
> >> #
> >>
> >> W2K with Cygwin and JVM 1.3
> >>
> >> java version "1.3.1_01"
> >> Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_01a)
> >> Java HotSpot(TM) Client VM (build 1.3.1_01, mixed mode)
> >>
> >> Any ideas on how to hunt this kind of thing down? Are app does have a
> >> startup servlet, so it's no doubt within that, but I was hoping for
> some
> >> general ideas on why this is exploding.
> >>
> >> Thanx!
> >>
> >> Regards,
> >>
> >> Will Hartung
> >> ([EMAIL PROTECTED])
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> To unsubscribe, e-mail:
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> >>
> >>
> >
> >
> >
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Re: Two instances of Tomcat

[Ben Ricker]

Remember that with 2 Tomcats, you need DOUBLE the memory. You may be
attempting to use more memory then you have in the box. Use 'top' to
watch the memory utilization and see if you are filling up on memory to
create the spreadsheet thingy.

You can control the memory usage of Tomcat using the -Xmx and -Xms to
control heap size. The settings you list would mean that you would need,
at least, 1.1gig of memory in the box to utilize both Tomcats to their
potential.

HTH,

Ben Ricker


On Tue, 2002-12-10 at 17:19, Mohbe, Sameer wrote:
> Hi Folks ,
>  Need some  urgent help regarding  setting  up two instances
> of Tomcat .Here goes the details .We used to have Apache 1.3.23 + Tomcat
> 4.0.2 configuration running on Red hat 7.0.We were running two web apps
> under Single instance of tomcat. To make them independent we are moving
> towards Two instances of tomcat .So we installed second instance residing in
> /opt/tomcat2 directory ,first being  in the directory called
> /opt/tomcat.Changes on server.xml were made for  two different  port nos.Now
> Everything works ok till the point  when we try to generate a report in
> second web application it gives a Java.lang Out of Memory error.This Final
> report feature uses the Formula 1 Software which is  a e-spreadsheet.Can any
> one please tell me what all settings are required for the TWO instances of
> tomcat.do we need TWO copies of  Worker.properties files (Coz we have only
> one ) and if yes then what changes need to be done .Is the Java error
> related to JVM memory settings .We have set TOMCAT_OPTS in /etc/profile for
> -Xms64 and -Xmx512.
> 
> Regards
> Sameer
> 
> 
> 
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Re: TC 4.1 and VM crash: how to report issue?

[Ben Ricker]

Have you tried turning off the HotSpot JIT compiler and trying your
test? All other things being equal, this will show you that the problem
resides in the interaction between Tomcat and the compiled code.

Just a thought...

Ben Ricker

On Wed, 2002-12-11 at 08:44, Aymeric Alibert wrote:
> I changed the debug flag to 10 in all elements of my server.xml.
> Looking at the log file, I cannot identifiy any error or warning from 
> Tomcat before it crashes.
> Here is a sample:
> 
> ...
> StandardContext[/residential]:  Mapped to servlet 'default' with servlet path 
>'/images/home_hdr.jpg' and path info 'null' and update=true
> StandardEngine[Standalone]: Mapping server name 'trngyouraccount.alliant-energy.com'
> StandardEngine[Standalone]:  Trying a direct match
> StandardEngine[Standalone]:  Trying an alias match
> StandardHost[localhost]: Mapping request URI '/residential/images/dropshadow.gif'
> StandardHost[localhost]:   Trying the longest context path prefix
> StandardHost[localhost]:  Mapped to context '/residential'
> Authenticator[/residential]: Security checking request GET 
>/residential/images/dropshadow.gif
> Authenticator[/residential]:   Checking constraint 'SecurityConstraint[youraccount 
>assistance LDAP authentication]' against GET /images/dropshadow.gif --> false
> Authenticator[/residential]:   No applicable constraint located
> Authenticator[/residential]:  Not subject to any constraint
> StandardContext[/residential]: Mapping contextPath='/residential' with 
>requestURI='/residential/images/dropshadow.gif' and 
>relativeURI='/images/dropshadow.gif'
> StandardContext[/residential]:   Trying exact match
> StandardContext[/residential]:   Trying prefix match
> StandardContext[/residential]:   Trying extension match
> StandardContext[/residential]:   Trying default match
> StandardContext[/residential]:  Mapped to servlet 'default' with servlet path 
>'/images/dropshadow.gif' and path info 'null' and update=true
> StandardEngine[Standalone]: Mapping server name 'trngyouraccount.alliant-energy.com'
> StandardEngine[Standalone]:  Trying a direct match
> StandardEngine[Standalone]:  Trying an alias match
> StandardHost[localhost]: Mapping request URI '/residential/images/homepa2.gif'
> StandardHost[localhost]:   Trying the longest context path prefix
> StandardHost[localhost]:  Mapped to context '/residential'
> Authenticator[/residential]: Security checking request GET 
>/residential/images/homepa2.gif
> Authenticator[/residential]:   Checking constraint 'SecurityConstraint[youraccount 
>assistance LDAP authentication]' against GET /images/homepa2.gif --> false
> Authenticator[/residential]:   No applicable constraint located
> Authenticator[/residential]:  Not subject to any constraint
> StandardContext[/residential]: Mapping contextPath='/residential' with 
>requestURI='/residential/images/homepa2.gif' and relativeURI='/images/homepa2.gif'
> StandardContext[/residential]:   Trying exact match
> StandardContext[/residential]:   Trying prefix match
> StandardContext[/residential]:   Trying extension match
> StandardContext[/residential]:   Trying default match
> StandardContext[/residential]:  Mapped to servlet 'default' with servlet path 
>'/images/homepa2.gif' and path info 'null' and update=true
> StandardEngine[Standalone]: Mapping server name 'trngyouraccount.alliant-energy.com'
> StandardEngine[Standalone]:  Trying a direct match
> StandardEngine[Standalone]:  Trying an alias match
> StandardHost[localhost]: Mapping request URI '/residential/images/_c60b27.gif'
> StandardHost[localhost]:   Trying the longest context path prefix
> StandardHost[localhost]:  Mapped to context '/residential'
> Authenticator[/residential]: Security checking request GET 
>/residential/images/_c60b27.gif
> Authenticator[/residential]:   Checking constraint 'SecurityConstraint[youraccount 
>assistance LDAP authentication]' against GET /images/_c60b27.gif --> false
> Authenticator[/residential]:   No applicable constraint located
> Authenticator[/residential]:  Not subject to any constraint
> StandardContext[/residential]: Mapping contextPath='/residential' with 
>requestURI='/residential/images/_c60b27.gif' and relativeURI='/images/_c60b27.gif'
> StandardContext[/residential]:   Trying exact match
> StandardContext[/residential]:   Trying prefix match
> StandardContext[/residential]:   Trying extension match
> 
> Unexpected Signal : 11 occurred at PC=0x3981797C
> Function=[Unknown.]
> Lib

Re: Mod_jk is not compatible this version of apache

[Ben Ricker]

Have you tried compiling your own connector from source? 

HTH,

Ben Ricker

On Wed, 2002-12-11 at 12:56, R. C. Hill wrote:
> Has anyone found a solution to this problem. I'm in the same boat and need 
> of a solution...thanks.
> 
> -R
> 
> >From: "John B. Moore" <[EMAIL PROTECTED]>
> >Reply-To: "Tomcat Users List" <[EMAIL PROTECTED]>
> >To: [EMAIL PROTECTED]
> >Subject: Mod_jk is not compatible this version of apache
> >Date: Sat, 07 Dec 2002 14:47:25 -0800
> >
> >Versions
> >Apache  httpd-2.0.40
> >Tomcat 4.1.12
> >
> >OS
> > Readhat 8 with latest kernal
> >
> >  I had compile Apache and it runs just fine, Tomcat also runs find 
> >independently
> >
> >   I then downloaded  the connectors for 4.1.12 and followed the "John 
> >Turner" directions for compiling the mod_jk... and copied to the ../modules 
> >directory and updated the server.xml with the
> >auto config.. check that the /auto/mod_jk.conf was being written and that 
> >it contained the correct path to the mod_jk.so module and matches the 
> >include in the httpd.conf file.
> >
> >   Sadly I'm getting the error message
> >
> >"httpd: module "mod_jk.so" is not compatible with this version of 
> >apache.."
> >
> >Anyone with some suggestions on where I need to look next... I'm 
> >stumped..
> >
> > John..
> >
> >
> >--
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> 
> 
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RE: Apache-Tomcat mod_jk

[Ben Ricker]

You seem to be confused here. I believe you said you were accessing port
8080 when it was working. Now, unless you setup Apache to listen on port
8080, you were talking directly to Tomcat's web server. Now that you
have moved to Apache, you want to drop the 8080 and use port 80, which
Apache listens to by default (again, unless you changed it).

I would suggest that you post all the lines you added to httpd.conf,
your workers.properties conf file, and your server.xml file. 

The JkMount directive tells Apache what path gets mapped to Tomcat; see
http://jakarta.apache.org/tomcat/tomcat-3.2-doc/mod_jk-howto.html for
more information about the directive.

HTH,

Ben Ricker

On Thu, 2002-12-12 at 10:41, Denise Mangano wrote:
> I do have a workers.properties file.  I checked that, my server.xml, and my
> httpd.conf and all server names are the same.  
> 
> I thought the mod_jk.conf file took care of the LoadModule directive that I
> would have had to place in my httpd.conf file.  I tried searching for info
> on the JkMount directive but could not find any.  Do I place JkMount
> path/to/modules/mod_jk-1.3-eapi.so?  And where would I place that in the
> httpd.conf file?  I just don't get why it was working before, but now it
> isn't
> 
> Thanks again.
> 
> Denise Mangano
> Help Desk Analyst
> Complus Data Innovations, Inc.
> 
> 
> -Original Message-
> From: Turner, John [mailto:[EMAIL PROTECTED]] 
> Sent: Thursday, December 12, 2002 10:52 AM
> To: 'Tomcat Users List'
> Subject: RE: Apache-Tomcat mod_jk
> 
> 
> 
> Do you have a workers.properties file?  Creating one is explained in my
> HOWTO...JK needs one to understand how to get to Tomcat.
> 
> Do you have the JkMount statements in httpd.conf?  Apache needs those to
> understand what to send to JK.
> 
> John
> 
> 
> > -Original Message-
> > From: Denise Mangano [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, December 12, 2002 10:38 AM
> > To: 'Tomcat Users List'
> > Subject: RE: Apache-Tomcat mod_jk
> > 
> > 
> > Thank you very much for your help.  The instructions were easy enough 
> > to follow, with a few exceptions.  I downloaded the
> > mod_jk-1.3-eapi.so because
> > as per the site, that was the module to use if I am running 
> > Apache 1.3 with
> > mod_ssl.  After doing all the steps I tried to restart Apache 
> > and got the
> > following error message:
> > 
> > Starting httpd: Syntax error on line 4 of
> > /var/jakarta-tomcat-4.1.12/conf/auto/mod_jk.conf:
> > Cannot load /etc/httpd/libexec/mod_jk.so into server:
> > /etc/httpd/libexec/mod_jk.so: cannot open shared object file: No such 
> > file or directory
> > 
> > I changed the path in the mod_jk.conf file to  LoadModule jk_module
> > /the/exact/path/to/mod_jk-1.3-eapi.so
> > 
> > When I tried to restart Apache it restarted no problem.  But now I 
> > cannot get to http://localhost:8080 when before I could.
> > (http://localhost still
> > works though)  Any thoughts?  In the meantime I am going back 
> > to double
> > check everything.
> > 
> > Denise Mangano
> > Help Desk Analyst
> > Complus Data Innovations, Inc.
> > 
> > 
> > -Original Message-
> > From: Turner, John [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, December 12, 2002 9:14 AM
> > To: 'Tomcat Users List'
> > Subject: RE: Apache-Tomcat HOWTO
> > 
> > 
> > 
> > #1: Yes.
> > 
> > #2: No. :)
> > 
> > You don't need ant.  When I originally wrote the HOWTO, I thought you 
> > did, so I hacked through getting it to work and put that in my
> > HOWTO.  Then,
> > based on a tip from someone on the list I learned that I 
> > didn't need to go
> > through all that, all I needed to do was follow connector 
> > build option #2,
> > which is using the standard ./configure method.
> > 
> > So, basically, if you want to build the connector from source, all you 
> > have to do is (assuming a GNU-ready build environment):
> > 
> > NOTE: the ./configure method assumes you have a sane build
> > environment:
> > libtool, GNU make, autoconf, m4
> > 
> > a) cd to CONNECTOR_HOME/jk/native.
> > 
> > b) check README and README.configure.
> > 
> > c) run buildconf.sh: ./buildconf.sh. This will create a file called
> > "configure" in CONNECTOR_HOME/jk/native.
> > 
> > d) run configure: ./configure 
> > --with-apxs=/some/path/to/apache/bin/apxs
> > --with-java-home=${JAVA_HOME}
> > 
> > e) run make: make
>

RE: Apache-Tomcat mod_jk

[Ben Ricker]

I pasted before I read the link below...that how-to is for 3.2. The one
for 4.x is at
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/config/ajp.html.

Another good How-to that I used to setup a load-balanced
Apache-mod_jk-Tomcat 4.0.6 setup is at http://www.ubeans.com/tomcat/.

Good luck,

Ben Ricker

On Thu, 2002-12-12 at 10:44, Ben Ricker wrote:
> You seem to be confused here. I believe you said you were accessing port
> 8080 when it was working. Now, unless you setup Apache to listen on port
> 8080, you were talking directly to Tomcat's web server. Now that you
> have moved to Apache, you want to drop the 8080 and use port 80, which
> Apache listens to by default (again, unless you changed it).
> 
> I would suggest that you post all the lines you added to httpd.conf,
> your workers.properties conf file, and your server.xml file. 
> 
> The JkMount directive tells Apache what path gets mapped to Tomcat; see
> http://jakarta.apache.org/tomcat/tomcat-3.2-doc/mod_jk-howto.html for
> more information about the directive.
> 
> HTH,
> 
> Ben Ricker
> 
> On Thu, 2002-12-12 at 10:41, Denise Mangano wrote:
> > I do have a workers.properties file.  I checked that, my server.xml, and my
> > httpd.conf and all server names are the same.  
> > 
> > I thought the mod_jk.conf file took care of the LoadModule directive that I
> > would have had to place in my httpd.conf file.  I tried searching for info
> > on the JkMount directive but could not find any.  Do I place JkMount
> > path/to/modules/mod_jk-1.3-eapi.so?  And where would I place that in the
> > httpd.conf file?  I just don't get why it was working before, but now it
> > isn't
> > 
> > Thanks again.
> > 
> > Denise Mangano
> > Help Desk Analyst
> > Complus Data Innovations, Inc.
> > 
> > 
> > -Original Message-
> > From: Turner, John [mailto:[EMAIL PROTECTED]] 
> > Sent: Thursday, December 12, 2002 10:52 AM
> > To: 'Tomcat Users List'
> > Subject: RE: Apache-Tomcat mod_jk
> > 
> > 
> > 
> > Do you have a workers.properties file?  Creating one is explained in my
> > HOWTO...JK needs one to understand how to get to Tomcat.
> > 
> > Do you have the JkMount statements in httpd.conf?  Apache needs those to
> > understand what to send to JK.
> > 
> > John
> > 
> > 
> > > -Original Message-
> > > From: Denise Mangano [mailto:[EMAIL PROTECTED]]
> > > Sent: Thursday, December 12, 2002 10:38 AM
> > > To: 'Tomcat Users List'
> > > Subject: RE: Apache-Tomcat mod_jk
> > > 
> > > 
> > > Thank you very much for your help.  The instructions were easy enough 
> > > to follow, with a few exceptions.  I downloaded the
> > > mod_jk-1.3-eapi.so because
> > > as per the site, that was the module to use if I am running 
> > > Apache 1.3 with
> > > mod_ssl.  After doing all the steps I tried to restart Apache 
> > > and got the
> > > following error message:
> > > 
> > > Starting httpd: Syntax error on line 4 of
> > > /var/jakarta-tomcat-4.1.12/conf/auto/mod_jk.conf:
> > > Cannot load /etc/httpd/libexec/mod_jk.so into server:
> > > /etc/httpd/libexec/mod_jk.so: cannot open shared object file: No such 
> > > file or directory
> > > 
> > > I changed the path in the mod_jk.conf file to  LoadModule jk_module
> > > /the/exact/path/to/mod_jk-1.3-eapi.so
> > > 
> > > When I tried to restart Apache it restarted no problem.  But now I 
> > > cannot get to http://localhost:8080 when before I could.
> > > (http://localhost still
> > > works though)  Any thoughts?  In the meantime I am going back 
> > > to double
> > > check everything.
> > > 
> > > Denise Mangano
> > > Help Desk Analyst
> > > Complus Data Innovations, Inc.
> > > 
> > > 
> > > -Original Message-
> > > From: Turner, John [mailto:[EMAIL PROTECTED]]
> > > Sent: Thursday, December 12, 2002 9:14 AM
> > > To: 'Tomcat Users List'
> > > Subject: RE: Apache-Tomcat HOWTO
> > > 
> > > 
> > > 
> > > #1: Yes.
> > > 
> > > #2: No. :)
> > > 
> > > You don't need ant.  When I originally wrote the HOWTO, I thought you 
> > > did, so I hacked through getting it to work and put that in my
> > > HOWTO.  Then,
> > > based on a tip from someone on the list I learned that I 
> > > didn't need to go
> > > through all that, all I

RE: Apache-Tomcat mod_jk

[Ben Ricker]

On Thu, 2002-12-12 at 11:07, Denise Mangano wrote:
> I think I am  confused : ) I originally set up my website in Apache, and it
> is listening to port 80.  I could access my website through
> http://localhost.  I installed Tomcat (did not make any config changes).
> After the installation I still had access to http://localhost and to
> Tomcat's index page at http://localhost:8080.  (At that point I could also
> access http://localhost:8080/examples/jsp/index.html.  Now I still can
> access http://localhost but I can NOTaccess http://localhost:8080.  Nor can
> I access the examples directory through either.  I have made no port
> changes.
> 
> The only change I made to the httpd.conf file was to add, at the very end,
> Include /usr/local/tomcat/conf/jk/mod_jk.conf  (I changed a path to my
> mod_jk.so file in the generated mod_jk.conf file so I copied the custom conf
> file to the jk directory and pointed there (read that in another how-to)).
> I have ServerName defined as www.mydomain.com

Therein lies the problem: You must tell Apache, through the JkMount
mentioned earlier, what paths will get mapped to Tomcat. For example, to
run the examples through port 80 (and Apache), you would use the
following:

JkMount /examples/servlet/* ajp13
JkMount /examples/*.jsp ajp13

This will cause mod_jk to "intercept requests for /examples/servlets and
/examples/*.jsp and send the request to the worker called ajp13 and
setup in your workers.properties file.

If you have another web app you want to use (I use /servlets for my
setup, just use the JkMount for the path and the worker. For example:

JkMount /path/you/want ajp13

Hth,

Ben Ricker 


> In my server.xml file:
> 
> 
> 
>  autoDeploy="true">
>  append="true" forwardAll="false" />
> 
> workers.properties:
> # BEGIN workers.properties
> #
> # Setup for apache system
> #
> # (optional) make this equal to CATALINA_HOME
> workers.tomcat_home=/var/jakarta-tomcat-4.1.12
> #
> # (optional) make this equal to JAVA_HOME
> workers.java_home=/usr/local/j2sdk1.4.1
> #
> ps=/
> worker.list=ajp13
> 
> # Definition for Ajp13 worker
> #
> worker.ajp13.port=8009
> 
> # change this line to match apache ServerName and Host name in server.xml
> worker.ajp13.host=www.parkingticketpayment.com
> 
> worker.ajp13.type=ajp13
> #
> # END workers.properties
> 
> I think I did everything right
> 
> Denise Mangano
> Help Desk Analyst
> Complus Data Innovations, Inc.
> 
> 
> -Original Message-
> From: Ben Ricker [mailto:[EMAIL PROTECTED]] 
> Sent: Thursday, December 12, 2002 11:44 AM
> To: 'Tomcat Users List'
> Subject: RE: Apache-Tomcat mod_jk
> 
> 
> You seem to be confused here. I believe you said you were accessing port
> 8080 when it was working. Now, unless you setup Apache to listen on port
> 8080, you were talking directly to Tomcat's web server. Now that you have
> moved to Apache, you want to drop the 8080 and use port 80, which Apache
> listens to by default (again, unless you changed it).
> 
> I would suggest that you post all the lines you added to httpd.conf, your
> workers.properties conf file, and your server.xml file. 
> 
> The JkMount directive tells Apache what path gets mapped to Tomcat; see
> http://jakarta.apache.org/tomcat/tomcat-3.2-doc/mod_jk-howto.html for more
> information about the directive.
> 
> HTH,
> 
> Ben Ricker
> 
> On Thu, 2002-12-12 at 10:41, Denise Mangano wrote:
> > I do have a workers.properties file.  I checked that, my server.xml, 
> > and my httpd.conf and all server names are the same.
> > 
> > I thought the mod_jk.conf file took care of the LoadModule directive 
> > that I would have had to place in my httpd.conf file.  I tried 
> > searching for info on the JkMount directive but could not find any.  
> > Do I place JkMount path/to/modules/mod_jk-1.3-eapi.so?  And where 
> > would I place that in the httpd.conf file?  I just don't get why it 
> > was working before, but now it isn't
> > 
> > Thanks again.
> > 
> > Denise Mangano
> > Help Desk Analyst
> > Complus Data Innovations, Inc.
> > 
> > 
> > -Original Message-
> > From: Turner, John [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, December 12, 2002 10:52 AM
> > To: 'Tomcat Users List'
> > Subject: RE: Apache-Tomcat mod_jk
> > 
> > 
> > 
> > Do you have a workers.properties file?  Creating one is explained in 
> > my HOWTO...JK needs one to understand how to get to Tomcat.
> > 
> > Do you have the JkMount statements in httpd.conf?  Apache needs those 
> > to understand what 

Re: Connecting Tomcat 4.1.12 with Apache 1.3

[Ben Ricker]

On Fri, 2002-12-13 at 12:16, Jerry Ford wrote:
> John:
> 
> I added the listener statements to server.xml.
> 
> mod_jk.conf showsentries for each of the webapps, and 
> there is a JkMount entry for the servlets (including my HelloWorld entry).
> 
> mod_jk.log is empty.

Do you see that mod_jk is being loaded by Apache when you start it or in
Apache's error_log?  I see the following when I start Apache:

Apache/1.3.26 (Unix) mod_jk/1.2.0 configured -- resuming normal
operations

I also will assume that you have the 'Include' statement in the
httpd.conf for mod_jk.properties (as well as the LoadModule/AddModule
directives for mod_jk.so).

You might also want to bump the 'JkLogLevel' in your mod_jk.properties
to get the debug level to get some feedback on what is going on.

Hth,

Ben Ricker

> What more do I need to do?
> 
> Thanks, Jerry
> 
> Turner, John wrote:
> 
> >Mod_webapp is deprecated, and has some fairly serious limitations.
> >
> >JK/JK2 is the better choice if you are concerned with future growth.
> >
> >If you're having problems, perhaps my HOWTOs will help:
> >
> >http://www.johnturner.com/howto
> >
> >John
> >
> >-Original Message-
> >From: Jerry Ford [mailto:[EMAIL PROTECTED]] 
> >Sent: Wednesday, December 11, 2002 3:15 PM
> >To: Tomcat Users List
> >Subject: Re: Connecting Tomcat 4.1.12 with Apache 1.3
> >
> >Denise:
> >
> >I have just got my Apache 1.3.27/Tomcat 4.1.12 connection to work.
> >
> >Answers to your questions are yes, and yes.  You need a connector 
> >between them, and mod_jk.so is one such connector.
> >
> >However, I had a devil of a time locating any connector on the 
> >apache.org website, and I never was able to make mod_jk work (I tried 
> >using the version that did work with my Tomcat 3.2 installation, but it 
> >did not work with 4.1 and I was not able to locate mod_jk---any 
> >version---on the apache website in order to rebuild).
> >
> >I ended up using mod_webapp.so, which is another connector.
> >
> >It's located in the jakarta-tomcat-connectors-4.1.12-src.tar.gz, which 
> >you can download from 
> >http://jakarta.apache.org/builds/jakarta-tomcat-4.0/release/v4.1.12/src/
> >(the same directory as tomcat itself).
> >
> >When you unpack it, look for README.txt in the webapp directory. It will 
> >tell you how to build the connector from CVS.  Follow the directions in 
> >the readme.  They're clear, straightforward, and the build process was 
> >smooth and routine, for me at least.  
> >
> >Jerry
> >
> > 
> ><http://jakarta.apache.org/builds/jakarta-tomcat-4.0/release/v4.1.12/src/jak
> >arta-tomcat-connectors-4.1.12-src.tar.gz>
> >
> >
> >
> >Denise Mangano wrote:
> >
> >  
> >
> >>Hi all,
> >>
> >>I am fairly new to using Apache / Tomcat. I currently have my website set
> >>
> >>
> >up
> >  
> >
> >>in Apache, running in the /var/html directory. I have installed Tomcat
> >>because I have a form page (HTML) that I want to run a servlet with to
> >>process a credit card payment with an outside payment processor. I have
> >>
> >>
> >seen
> >  
> >
> >>some instances that people have stated I have to do some special
> >>configuration in order to use both Apache and Tomcat together. Is this so?
> >>If so, then are there any good resources for this?
> >>
> >>Perhaps using JSP for the form will be better because I want a custom page
> >>to display depending on what error message will come back from the payment
> >>engine.  If that is the case then wouldn't I need the connection between
> >>Apache and Tomcat? (the images I will need for the JSP page is stored in
> >>apache web directory as well).  Is this the mod_jk plug in? (I am running
> >>RedHat Linux 7.3)
> >>
> >>Thanks in advance!
> >>
> >>Denise Mangano
> >>Help Desk Analyst
> >>Complus Data Innovations, Inc.
> >>
> >>
> >>--
> >>To unsubscribe, e-mail:
> >>
> >>
> ><mailto:[EMAIL PROTECTED]>
> >  
> >
> >>For additional commands, e-mail:
> >>
> >>
> ><mailto:[EMAIL PROTECTED]>
> >  
> >
> >> 
> >>
> >>
> >>
> >
> >
> >--
> >To unsubscribe, e-mail:
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> >
> >---
> >Incoming mail is certified Virus Free.
> >Checked by AVG anti-virus system (http://www.grisoft.com).
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> >  
> >
> 
> 
> --
> To unsubscribe, e-mail:   <mailto:[EMAIL PROTECTED]>
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Wellinx.com


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Re: Sharing Session data between two instances?

[Ben Ricker]

Try seaarching the archives. This question has been answered many times
before. You can search them here:

http://mikal.org/interests/java/tomcat/index.jsp

And for an answer to your question, you are looking for in session
replication. See:

http://www2.theserverside.com/resources/article.jsp?l=Tomcat

Ben Ricker

On Mon, 2002-12-16 at 09:32, Puneet Agarwal wrote:
> Even I want to do the same and am looking for the answer whether it is possible or 
>not.
> 
> I posted same question 2-3 times in last week and have been monitoring this mail 
>list but noone has replied.
> 
> The much I could  gather is, it is not possible directly, It could be possible if we 
>use apache and multiple instances of tomcat. The rest we may have to write our own 
>code to achieve this.
> 
> Could someone answer this please...!
> 
> Regards
> Puneet
> 
> 
> - Original Message -
> From: Prashanth Pushpagiri <[EMAIL PROTECTED]>
> Date: Sun, 15 Dec 2002 10:57:09 -0800 (PST)
> To: Tomcat Users List <[EMAIL PROTECTED]>
> Subject: Sharing Session data between two instances?
> 
> > Hi
> > 
> > I am trying to setup tomcat 4.1.12 on two servers so
> > that an incoming request can be handled by either one
> > of the servers. What I would like to do is share
> > session details between the two instances. Is this
> > possible?
> > 
> > Thanks
> > Prashanth
> > 
> > __
> > Do you Yahoo!?
> > Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> > http://mailplus.yahoo.com
> > 
> > --
> > To unsubscribe, e-mail:   <mailto:[EMAIL PROTECTED]>
> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
> > 
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Wellinx.com


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Re: app roll out.

[Ben Ricker]

This would be done by Apache (though it could possibly be done by
Tomcat; I use Apache). You can do it one of two ways:

1) Use mod_rewrite to rewrite "/index.html" to "/path-to-context-name".
Not sure on the mechanics of this. Try the Apache list for pointers, or
any number of tutotials on mod_rewrite.

2) Use the 'Redirect' directive in Apache. This is what I use and has
worked for 2 years. Basically, you stick a line in your httpd.conf which
goes:

Redirect temp www.domain.com www.domain.com/path-to-context

Hth,

Ben Ricker


On Mon, 2002-12-16 at 15:28, Alexander Wallace wrote:
> Hi there. Almost ready to deploy my app to test in real world.  I'm using 
> apache + tomcat (using mod_jk).  My app name is wxyz, and I have purchased 
> the domain name i want it to be under. I want to call www.mydomain.com and 
> get my app's index. instead of typing the www.mydomain.com/wxyz.
> 
> How can i do that? Can someone, if not tell me how, tell me where to read to 
> learn how to do it?
> 
> Sorry about the newbienezz of the email. I know nothing about this things. 
> 
> Thanks!
> 
> 
> --
> To unsubscribe, e-mail:   <mailto:[EMAIL PROTECTED]>
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Wellinx.com


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Re: app roll out.

[Ben Ricker]

Here is the line that workd for me in Apache 1.3.27 Are you using Apache
2.x?

Redirect temp /index.html http://main.wellinx.com/servlets/Logon?STATE=0&USER=doctor

The '/' by itself may not work. When I set it up, I had to include the
'index.html'. But I do not remember because I set it up so long ago.

Ben Ricker


On Mon, 2002-12-16 at 18:40, Alexander Wallace wrote:
> Adding a line like the one you suggest doesn't seem to work... People at 
> apache's irc said it should be something like:
> 
> Redirect / http://www.domain.com/context
> 
> But that only seems to create infinite redirects since it redirects to the 
> same domain name.
> 
> The docs say that redirect takes a URI and then a URL.
> 
> Could you check your config files and paste one line here? Just to make sure 
> the syntax is correct?
> 
> Thanks!
> 
> On Monday 16 December 2002 15:42, Ben Ricker wrote:
> 
> > Redirect temp www.domain.com www.domain.com/path-to-context
> >
> > Hth,
> >
> > Ben Ricker
> 
> 
> --
> To unsubscribe, e-mail:   <mailto:[EMAIL PROTECTED]>
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Wellinx.com


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Re: app roll out.

[Ben Ricker]

On Mon, 2002-12-16 at 18:51, Alexander Wallace wrote:
> The line:
> 
> RedirectMatch ^/$ http://mysite/theContext
> 
> did the trick.
> 
> Now I have to find out how to make apache call index.jsp automatically if no 
> page is requested.  If i use http://localhost:8080/myapp tomcat calls 
> index.jsp automatically, but when going through apache 
> (http://localhost/myapp) apache doesn't load the index.jsp.  
> 
> How can i make it load index.jsp automatically?

You need to add the index.jsp to the possible "DirectoryIndex"
directive. For example:

#
# DirectoryIndex: Name of the file or files to use as a pre-written HTML
# directory index.  Separate multiple entries with spaces.
#

DirectoryIndex index.html index.jsp


If you call a URL without a file spec, Apache will try all the files in
the DirectoryIndex directive utnil it his one.

Ben Ricker

> Thanks again!
> 
> On Monday 16 December 2002 15:42, Ben Ricker wrote:
> > This would be done by Apache (though it could possibly be done by
> > Tomcat; I use Apache). You can do it one of two ways:
> >
> > 1) Use mod_rewrite to rewrite "/index.html" to "/path-to-context-name".
> > Not sure on the mechanics of this. Try the Apache list for pointers, or
> > any number of tutotials on mod_rewrite.
> >
> > 2) Use the 'Redirect' directive in Apache. This is what I use and has
> > worked for 2 years. Basically, you stick a line in your httpd.conf which
> > goes:
> >
> > Redirect temp www.domain.com www.domain.com/path-to-context
> 
> 
> --
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Re: [OFF-TOPIC] RE: Naïve question about root

[Ben Ricker]

On Wed, 2002-12-18 at 12:26, Matt Harris wrote:
> Apache normally runs multiple processes to handle multiple simoultaneous
> user requests.  This can be configured in your httpd.conf.  Tomcat runs
> multiple processes, which it calls "workers".  Since tomcat is in java
> and not a truly binary-compiled language (like C or C++) it runs under
> java which is part of your JRE (java runtime environment).  


Another small tidbit: Linux's 'ps' command shows threads as processes.
Apache runs multiple processes, but Java runs one processes with
multiple threads. Can't remember why Linux does that...

Anyway, we run our Tomcats on Solaris and there is only one java process
per Tomcat instance listed in 'ps'.

Ben Ricker

> Denise Mangano wrote:
> > 
> > Hi all,  I followed everyone's suggestions and so far so good.  I set up the
> > users like John suggested, and disable the desktop environment like Matt
> > suggested.  I disabled this service by changing my run level to 3.  I now
> > have to get Tomcat back into the startup...  For now I have started it
> > manually.  But here is the weird thing...
> > 
> > Why so many processes running for Apache, and java (below)...  I ran ps -ef
> > after reboot and before I started Tomcat and the java processes were not
> > listed.  Is this normal?  Also, how change the java processes from running
> > as root (if I need to)?  And lastly, which one of these is supposed to
> > represent the Tomcat service running?
> > 
> > John - any word on that new HOW-To yet for 4.1.17?  I'm going to get
> > cracking on that in a little bit :)
> > 
> > Thanks in advance for any thoughts/advice!! : )
> > Denise
> > 
> > UIDPID  PPID  C STIME TTY  TIME CMD
> > root 1 0  0 11:37 ?00:00:04 init
> > root 2 1  0 11:37 ?00:00:00 [keventd]
> > root 3 1  0 11:37 ?00:00:00 [ksoftirqd_CPU0]
> > root 4 1  0 11:37 ?00:00:00 [kswapd]
> > root 5 1  0 11:37 ?00:00:00 [bdflush]
> > root 6 1  0 11:37 ?00:00:00 [kupdated]
> > root 7 1  0 11:37 ?00:00:00 [mdrecoveryd]
> > root13 1  0 11:37 ?00:00:00 [scsi_eh_0]
> > root14 1  0 11:37 ?00:00:00 [scsi_eh_1]
> > root17 1  0 11:38 ?00:00:00 [kjournald]
> > root96 1  0 11:38 ?00:00:00 [khubd]
> > root   190 1  0 11:38 ?00:00:00 [kjournald]
> > root   191 1  0 11:38 ?00:00:00 [kjournald]
> > root   192 1  0 11:38 ?00:00:00 [kjournald]
> > root   193 1  0 11:38 ?00:00:00 [kjournald]
> > root   559 1  0 11:38 ?00:00:00 syslogd -m 0
> > root   564 1  0 11:38 ?00:00:00 klogd -x
> > rpc584 1  0 11:38 ?00:00:00 portmap
> > rpcuser612 1  0 11:38 ?00:00:00 rpc.statd
> > root   762 1  0 11:38 ?00:00:00 /usr/sbin/sshd
> > root   795 1  0 11:38 ?00:00:00 xinetd -stayalive -reuse
> > -pidfil
> > root   823 1  0 11:38 ?00:00:00 sendmail: accepting
> > connections
> > root   842 1  0 11:38 ?00:00:00 gpm -t ps/2 -m /dev/mouse
> > root   865 1  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 868   865  0 11:38 ?00:00:00 /usr/sbin/fcgi-
> > -DHAVE_ACCESS -D
> > apache 870   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 871   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 872   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 874   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 875   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 876   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 877   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > apache 879   865  0 11:38 ?00:00:00 /usr/sbin/httpd
> > -DHAVE_ACCESS -D
> > root   892 1  0 11:38 ?00:00:00 crond
> > xfs946 1  0 11:38 ?00:00:00 xfs -droppriv -daemon
> > daemon 982 1  0 11:38 ?00:00:00 /usr/sbin/atd
> > root   991 1  0 11:38 tty1 00:00:00 /sbin/mingetty tty1
> > root   992 1  0 11:38 tty2 00:00:00 /sbin/mingetty tty2
> > root   993 1  0 11:38 tty3

Latest stable version?

[Ben Ricker]

I am running Tomcat 4.0.6 in a production environment right now. I want
to move to 4.1.x. I hear about 4.1.17. Is this considered production
stable? It is probably MORE stable then 4.1.16, from what I have heard.

However, the Jakarta site shows 4.1.12 as the stable branch of 4.1.x,
but that has been that way for a long time. Is there going to be an
increment soon to the stable branch?

Thanks,

Ben Ricker

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Ben Ricker <[EMAIL PROTECTED]>
Wellinx.com


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Re: Latest stable version?

[Ben Ricker]

On Wed, 2002-12-18 at 14:47, [EMAIL PROTECTED] wrote:
> Jakarta site says 4.1.17 is the latest stable version and not 4.1.12!
> 
> Ganesh

Damn! You are right...where in hell was I when I saw 1.1.12

Thanks!

Ben Ricker


> 
>  
>
>         "Ben Ricker" 
>
> <[EMAIL PROTECTED]>
>
>  
>
>  To: "Tomcat Users List" 
>
> 18-Dec-2002 15:43
>
> Please respond tocc: 
>
> "Tomcat Users List"  Subject: Latest stable version? 
>
> <[EMAIL PROTECTED]   
>
> pache.org>   
>
>  
>
>  
>
> 
> 
> 
> I am running Tomcat 4.0.6 in a production environment right now. I want
> to move to 4.1.x. I hear about 4.1.17. Is this considered production
> stable? It is probably MORE stable then 4.1.16, from what I have heard.
> 
> However, the Jakarta site shows 4.1.12 as the stable branch of 4.1.x,
> but that has been that way for a long time. Is there going to be an
> increment soon to the stable branch?
> 
> Thanks,
> 
> Ben Ricker
> 
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> Ben Ricker <[EMAIL PROTECTED]>
> Wellinx.com
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