Re: Effect of Heap Size on Performance?

[Leon Rosenberg]

On Wed, Mar 11, 2009 at 1:56 AM, Caldarale, Charles R
chuck.caldar...@unisys.com wrote:

 It's impossible to prevent at least some objects from eventually migrating to 
 the OldGen, since anything that persists long enough will end up there after 
 some number of minor GCs.

But by choosing a large enough heap size (and evtl. according
strategy) it is possible to optimize the usage of the eden aka young
space and to reduce the amount of minor collections, hence reducing
the chances for unnecessary migration into old space. However, in a
webapp, anything you create during the processing of a request should
remain in the eden and 'die young' (unless you put it in a session or
a cache explicitely).

JMX gives you the access to MemoryPool usage statistics and you can
actually monitor all of heap-spaces separately. Moskito btw, gathers
this info and presents it via its web ui:
http://moskito.anotheria.net/moskitodemo/mui/mskShowProducersByCategory?pCategory=memory

We use this info to create graphs of free memory in relevant spaces
(the tenured/old space, depending on the collector is the most easiest
to monitor, and most relevant to performance) and optimize the
settings unless the memory usage graphs are looking well (not hectic,
well formed sawtooth). With the graph you would also detect a memory
leak much faster, even if the heap size would be too large.

regards
Leon

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RE: Starting Tomcat6 via command line/Removing registry keys

[Peter Crowther]

 From: Cornelius Herzog (CH Software) [mailto:c.her...@chsoftware.net]
 Now I want to control Tomcat via an external script and so I
 need it to start via command line to adapt the parameters.

If you install Tomcat via the zip (not the exe), you get some scripts to 
control its startup and shutdown via the command line.  tomcat6.exe is not 
used, and neither is the registry.  Try downloading the zip, unzipping it, 
looking for the .bat files in the root of the unzipped content and moving them 
across to your current install.

For some reason the scripts are not included in the setup version that installs 
the service.  Several of us on this list are puzzled about why they are not 
included.

- Peter

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Re: Lazy Virtual Hosting?

[Mark Thomas]

Caldarale, Charles R wrote:
 From: Gregor Schneider [mailto:rc4...@googlemail.com] 
 Subject: Re: Lazy Virtual Hosting?

 However, since I'll have to use Authentication (see my other post),
 thus needing SSL, I guess I have to setup a HTTP-Connector for each
 of them.
 
 Depends on how much separation you want.  If you're using a self-signed 
 certificate, then the same one should suffice for all of your sites.  If you 
 want real certificates, then you'll need a separate Connector for each 
 site, assigned to the IP address for that site.  Clients won't be able to 
 login with an IP address, but that's probably not a big deal.
 
 If you really want to have a separate Connector for each site with no 
 potential for cross-talk, you'll actually need a separate Service element 
 for each.  Alternatively, a Valve at the Engine level would probably 
 suffice to prevent mixing of IP addresses and site names.
The simplest way to achieve this would be to use an Alias element under each
Host element that specifies the IP address for that host.

Mark


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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Rainer Jung]

On 10.03.2009 23:10, André Warnier wrote:


Rainer Jung wrote:
[...]

2) getRemoteAddr() gives you the address of the system, which opened
the connection. In case of an AJP connector, this is not true, because
AJP is meant to be used for reverse proxies. So here you get the
address of the system which opened the connection to the web server,
forwarded via AJP to Tomcat.


Rainer, how does that combine with the mod_jk ForwardLocalAddress
directive ?

And, by the way, which local address are we talking about ?
(I mean,if the front-end Apache server has several IP adresses, which
one would it pass on to Tomcat ?)


Ah, actually forgot about that one. We then forward a local_ip field of 
httpd as the client address. From the code of httpd it seems, that it is 
the address, to which the connection came in. I'll double check and add 
that feature to the new jk documentation page about proxies.


Thanks for asking,

Rainer

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Re: Https forwarding problem

[Hisham]

Thanks for your reply Chris.

At first i did try to limit using address attribute, but later i removed
it.  The config snippets i have shown are complete.  You are right, the
exception is coming from the web service call.

My concern is that because i have this security-constraint which makes any
url pattern CONFIDENTIAL, that it's causing the web service call to be
redirected as well.  And its very frustrating why the following config is
NOT working (where i specify that urls starting with axis2 should be
ignored), and ws calls STILL get redirected:

security-constraint
web-resource-collection
url-pattern/axis2/*/url-pattern
url-pattern/axis2/rest/*/url-pattern
/web-resource-collection
user-data-constraint
transport-guaranteeNONE/transport-guarantee
/user-data-constraint
/security-constraint
Any ideas?  Thanks.

-h
On Tue, Mar 10, 2009 at 9:07 PM, Christopher Schultz 
ch...@christopherschultz.net wrote:

 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 Hisham,

 On 3/6/2009 6:21 AM, Hisham wrote:
 url-pattern/*/url-pattern
transport-guaranteeCONFIDENTIAL/transport-guarantee

 Good.

  Connector port=80 redirectPort=443 /
  Connector port=443 scheme=https secure=true
 clientAuth=false sslProtocol=TLS
  keystoreFile=conf/keystore.jks
 keystorePass=xyz maxPostSize=15728640 /

 Good.

  I have created the certificates, etc. and it works fine and if i type
  http://localhost I am redirected to https://localhost and the login page
 is
  shown.

 Good.

  But, during login, I am making a web service call.  These web
  services are deployed on the same Tomcat and are accessed via
  http://localhost/axis2/rest...
 
  When i try to login I am getting an exception:
 
  java.net.ConnectException: Connection refused
  at java.net.PlainSocketImpl.socketConnect(Native Method)
  at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)

 Presumably this happens to the web service call, not to your
 application, right? Your stack trace didn't include enough to show where
 your code comes in.

 Connection Refused indicates that you can't reach the correct service.
 Since you're connecting to localhost you're unlikely to be having
 firewall issues (though such access /could/ be blocked). My guess is
 that you've bound your Connector to a specific IP address using the
 address attribute. Did you post your entire server.xml file, or just
 the relevant parts? You might want to re-post with all the details.

  So i figured that the web service call is also being accessed via SSL and
  that is not supported by the caller.  Anyway to get around this I have
  tried a NUMBER of things:
 
  1. I added a second security-constraint in web.xml with url pattern as
  /axis2/* which has transport-guarantee as NONE.
  2. I added a 2nd service to my server.xml that has the web services
  deployed on a different port.
  3. And a whole lot of other things that were useless :(
 
  Is it even possible to do this, going from https - http (they are 2
  separate applications mind you)?  Does anyone have any suggestions on how
 to
  fix this?  This is driving me nuts!  Thanks!

 If you get the same error (connection refused) no matter what you try,
 then my conclusion is that you'd bound your Connector to specific
 address. That means that you can't make a connection to localhost:80
 because nobody is listening.

 - -chris
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Re: Tomcat Clustering trouble when starting up under high load

[Mikel Ibiricu]

Hi Rainer, thanks for your response.

I tried the config you suggested. It suppose the way of configuring those
parameters is as you said, but skipping manager. from the begining, as
when I tried as you said, I got this in the catalina. log:

10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin
ADVERTENCIA: [SetPropertiesRule]{Server/Service/Engine/Cluster/Manager}
Setting property 'manager.sendAllSessions' to 'false' did not find a
matching property.
10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin
ADVERTENCIA: [SetPropertiesRule]{Server/Service/Engine/Cluster/Manager}
Setting property 'manager.sendAllSessionsSize' to '200' did not find a
matching property.
10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin
ADVERTENCIA: [SetPropertiesRule]{Server/Service/Engine/Cluster/Manager}
Setting property 'manager.sendAllSessionsWaitTime' to '0' did not find a
matching property.
10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin

Maybe without the manager prefix? sendAllSessions=false,
sendAllSessionSize=200 and sendAllSessionsWaitTime=?

Filip, we consider taking thead dumps, but we are using jdk 1.5 under
windows. I heard it is not supported in Windows until jdk 1.6. Is it true?

Best regards
Mikel



2009/3/9 Rainer Jung rainer.j...@kippdata.de

 On 09.03.2009 09:24, Mikel Ibiricu wrote:

 So, It works OK but when starting up one of the nodes with over 500
 sessions
 alive in the other, it doesn't replicate anything. We assume that it would
 not be able to replicate everything... but why it does either replicate
 everything or nothing? If it's not able replicate all the sessions, we
 would
 assume it, but we would like to replicate at least something... Maybe some
 trouble with the config we are trying? We tried to limit the
 keepAliveCount
 of the senders, without improvement with this.

 Reading the DeltaManager code, I have seen the sendAlllSessions parameter.
 According to in-line javadoc and the implementation,

 /**
  * handle receive that other node want all sessions ( restart )
  * a) send all sessions with one message
  * b) send session at blocks
  * After sending send state is complete transfered
  * @param msg
  * @param sender
  * @throws IOException
  */
 protected void handleGET_ALL_SESSIONS(SessionMessage msg, Member
 sender)
 throws IOException {

 [...]

 if (isSendAllSessions()) {
 sendSessions(sender, currentSessions, findSessionTimestamp);
 } else {
 // send session at blocks
 int len = currentSessions.length  getSendAllSessionsSize() ?
 currentSessions.length : getSendAllSessionsSize();
 Session[] sendSessions = new Session[len];
 for (int i = 0; i  currentSessions.length; i +=
 getSendAllSessionsSize()) {
 len = i + getSendAllSessionsSize()
  currentSessions.length
 ? currentSessions.length - i : getSendAllSessionsSize();
 System.arraycopy(currentSessions, i, sendSessions, 0,
 len);
 sendSessions(sender, sendSessions,findSessionTimestamp);
 if (getSendAllSessionsWaitTime()  0) {
 try {
 Thread.sleep(getSendAllSessionsWaitTime());
 } catch (Exception sleep) {
 }
 }//end if
 }//for
 }//end if

 SessionMessage newmsg = new
 SessionMessageImpl(name,SessionMessage.EVT_ALL_SESSION_TRANSFERCOMPLETE,
 null,SESSION-STATE-TRANSFERED, SESSION-STATE-TRANSFERED+ getName());
 newmsg.setTimestamp(findSessionTimestamp);
 if (log.isDebugEnabled())

 log.debug(sm.getString(deltaManager.createMessage.allSessionTransfered,getName()));
 counterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE++;
 cluster.send(newmsg, sender);
 }

 it may cover our expectatives, so I tried to include
 sendAllSessions=false
 in the cluster manager configuration

 Manager className=org.apache.catalina.ha.session.DeltaManager
name=clusterPruebas6
stateTransferTimeout=180
expireSessionsOnShutdown=false
notifyListenersOnReplication=false
sendAllSessions=false/

 But it seems like this parameter is not configurable from the server.xml
 file. So, what can I do to force that if it's not posible to replicate all
 the sessions, at least replicate something in the startup?


 If you want to test with sendAllSessions set to false, then add

 manager.sendAllSessions=false

 to the Manager element of the cluster configuration.

 You might then also want to configure:

 manager.sendAllSessionsSize: the number of session which will be serialized
 and send in one chunk (default if sendAllSessions=false: 1000)

 manager.sendAllSessionsWaitTime: the time in milliseconds between sending
 out consecutive session chunks 

hanging threads on Tomcat

[Patrick Plaatje]

Hi all,

on one of our websites we have a problem with threads keep hanging in 
Tomcat. We first noticed this 1.5 week ago and tried several things to 
find a solution. At that moment we were using java 1.4 and Tomcat 5.0. 
The symptoms were there after three hours of operation, about 250 
threads were hanging within tomcat, and they seemed to be waiting for 
something.


After a week we realised we needed more information whihc we couldn't 
get from the current setup, we upgraded the three production application 
servers to be Java 1.5 and Tomcat 5.5.25. All three servers still have 
the same problem, although the problem now has an interval of appr. 6 
hours instead of three.


During the hanging of the threads we made 8 threaddumps. But i am unsure 
of how to read the thread dumps. A small overview of the state of the 
threads:


- 309 threads overall
- Threads waiting for monitors: 57
- Threads sleeping on monitors: 191
- Threads locking monitors: 225
- Monitors: 225
- Monitors without locking threads: 3

Can somebody please help me figuring out what the cause is, or how to 
find the cause of the problem?


Best regards,

Patrick

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Tomcat for Dummies

[André Warnier]

Hi.

As part of the beginners rubrique, I have a question which will 
undoubtedly show the depth of my lack of knowledge of things Java and 
Tomcat.  But maybe there will be a sympathetic soul here.
Since I am still missing much of the underlying knowledge, I would beg 
that whoever answers does not get too classy on me.  The question is 
at the level of generalities, not classloaders or GC strategies level.


My question concerns the starting and stopping of web applications 
under Tomcat, and what these terms really mean in that context.


If I look at the Tomcat Manager application, and its capabilities of 
starting ans stopping applications, I get approximately the following 
mental picture :
- we have a JVM.  That is the real process that is running, at the OS 
level.  That process can be killed, or decide to stop running, at which 
point we don't have a JVM process anymore, and thus no Tomcat and no 
webapps at all.  That's kind of drastic and definitive.
- inside the JVM, we have a Tomcat.  Basically, that is only code 
which the JVM is running (a bit like a Perl interpreter process runs 
the list of Perl opcodes it has compiled a perl script into).  Tomcat 
can somehow decide that it is tired of living, and tell the JVM to stop 
running it.  At which point we have no webapps and no Tomcat anymore, 
and consequently (I presume, but this is already a bit less clear), no 
JVM anymore either, because not having anything to do anymore, it would 
also exit. Or ?
- then inside Tomcat, we have webapps.  It's already getting more 
mysterious there for me, but I resolve this intellectually by imagining 
that a webapp is just a subroutine which Tomcat runs from time to 
time, in response to a HTTP request for example.  So a webapp in fact 
is Tomcat, in the sense that when it runs it does so as an integral 
part of the Tomcat process.  So much so that if a webapp were to execute 
a system.exit(), it would take the whole Tomcat (and JVM) with it. Yes ?


So now, when the Tomcat Manager application decides to stop a web 
application, what it really does is just to prevent any further calls 
to this web application in the future, by removing some entry in a table 
of runnable webapps.  In other words, it does not really stop or 
kill any currently running instance of that webapp (those are allowed 
to finish what they are doing and return() to Tomcat main code), but 
it makes it so that any further call to /mywebapp will be met by a 
what ? response.

Is this a correct interpretation ?

Now comes the basic question : can a webapp stop itself, without taking 
the whole Tomcat and JVM with it ?  In other words, in response to 
something (a variable being a certain value, or the interception of some 
event or whatever), can my webapp decide to stop doing what it is 
currently doing, clean up after itself, and then do something to prevent 
itself ever being called again in the future of this Tomcat instance ?

(or say at least until some external intervention activates it again).



My next question in this rubrique will be about what individual webapps 
really share at the deep-down level, considering that they are all in 
the end issued from the same JVM process.




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Re: Effect of Heap Size on Performance?

[Oliver Schoett]

Washburn, Brian J [IT] wrote:

Also if the application is a web app with any kind of response time 
requirements I would strongly suggest that you use
   

   [set of four options]


My suggestion is to first get a feel for the current gc behaviour with 
jstat on the server:


   jstat -gc -t -h25 $pid 5000

Then look at the document describing garbage collection on Sun 1.6 JVMs:

   http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html

The solution to better GC behaviour may be as simple as choosing the 
right collector, as explained in the section Selecting a Collector.


Regards,

Oliver Schoett


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Re: Tomcat for Dummies

[Mark Thomas]

André Warnier wrote:
 - we have a JVM.  That is the real process that is running, at the OS
 level.  That process can be killed, or decide to stop running, at which
 point we don't have a JVM process anymore, and thus no Tomcat and no
 webapps at all.  That's kind of drastic and definitive.
Yes.

 - inside the JVM, we have a Tomcat.  Basically, that is only code
 which the JVM is running (a bit like a Perl interpreter process runs
 the list of Perl opcodes it has compiled a perl script into).  Tomcat
 can somehow decide that it is tired of living, and tell the JVM to stop
 running it.  At which point we have no webapps and no Tomcat anymore,
 and consequently (I presume, but this is already a bit less clear), no
 JVM anymore either, because not having anything to do anymore, it would
 also exit. Or ?
When Tomcat stops, it stops the JVM.

 - then inside Tomcat, we have webapps.  It's already getting more
 mysterious there for me, but I resolve this intellectually by imagining
 that a webapp is just a subroutine which Tomcat runs from time to
 time, in response to a HTTP request for example.  So a webapp in fact
 is Tomcat, in the sense that when it runs it does so as an integral
 part of the Tomcat process.  So much so that if a webapp were to execute
 a system.exit(), it would take the whole Tomcat (and JVM) with it. Yes ?
Correct. Unless you use a security manager which would stop the webapp calling
system.exit()

 So now, when the Tomcat Manager application decides to stop a web
 application, what it really does is just to prevent any further calls
 to this web application in the future, by removing some entry in a table
 of runnable webapps.  In other words, it does not really stop or
 kill any currently running instance of that webapp (those are allowed
 to finish what they are doing and return() to Tomcat main code), but
 it makes it so that any further call to /mywebapp will be met by a
 what ? response.
It depends :). Normally a 404 (not found) will be sent.

 Is this a correct interpretation ?
Almost. New requests are rejected. Tomcat gives current requests a 'reasonable'
period to stop processing. I forget what this is but it is of the order of tens
of seconds.

 Now comes the basic question : can a webapp stop itself, without taking
 the whole Tomcat and JVM with it ?  In other words, in response to
 something (a variable being a certain value, or the interception of some
 event or whatever), can my webapp decide to stop doing what it is
 currently doing, clean up after itself, and then do something to prevent
 itself ever being called again in the future of this Tomcat instance ?
 (or say at least until some external intervention activates it again).
Yes. It should be able to ask the manager to stop it or undeploy it.

Mark


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Re: hanging threads on Tomcat

[Mark Thomas]

Patrick Plaatje wrote:
 Hi all,
 
 on one of our websites we have a problem with threads keep hanging in
 Tomcat. We first noticed this 1.5 week ago and tried several things to
 find a solution. At that moment we were using java 1.4 and Tomcat 5.0.
 The symptoms were there after three hours of operation, about 250
 threads were hanging within tomcat, and they seemed to be waiting for
 something.
 
 After a week we realised we needed more information whihc we couldn't
 get from the current setup, we upgraded the three production application
 servers to be Java 1.5 and Tomcat 5.5.25. All three servers still have
 the same problem, although the problem now has an interval of appr. 6
 hours instead of three.
 
 During the hanging of the threads we made 8 threaddumps. But i am unsure
 of how to read the thread dumps. A small overview of the state of the
 threads:
 
 - 309 threads overall
 - Threads waiting for monitors: 57
 - Threads sleeping on monitors: 191
 - Threads locking monitors: 225
 - Monitors: 225
 - Monitors without locking threads: 3
 
 Can somebody please help me figuring out what the cause is, or how to
 find the cause of the problem?

You'll need to provide the thread dumps. Rather than all 8, just two ~15s apart
should suffice.

Mark

 
 Best regards,
 
 Patrick
 
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Re: Tomcat for Dummies

[André Warnier]

Mark Thomas wrote:

André Warnier wrote:

Now comes the basic question : can a webapp stop itself, without taking
the whole Tomcat and JVM with it ?  In other words, in response to
something (a variable being a certain value, or the interception of some
event or whatever), can my webapp decide to stop doing what it is
currently doing, clean up after itself, and then do something to prevent
itself ever being called again in the future of this Tomcat instance ?
(or say at least until some external intervention activates it again).

Yes. It should be able to ask the manager to stop it or undeploy it.

If I am not abusing, how does it do that, schematically ?  I presume it 
has a more direct way than to itself isue a HTTP request to the Manager 
webapp with the appropriate parameters ?


And if it asks to undeploy itself, is it not like pulling the carpet 
from under its own feet ?  I mean, this webapp is running, and even 
after asking the Manager to undeploy itself (meaning its whole shebang 
of classes and libs will be erased from the disk), it should be able to 
still stop itself cleanly.  What if that requires a class that would 
have to be loaded from its own WEB-INF/classes dir, which may not be 
there anymore ?



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unkown protocol httpg - using apache-tomcat-6.0.18

[shashidhar velagandula]

HI ,


I am using apache-tomcat-6.0.18 , I want to access a  SRM(storage
resource manager) service endpoint which uses httpg protocol
eg: service endpoint - httpg://srmserver.host:8444/ , by deploying a web
service application using apache-tomcat server

when a client tries to invoke the service , it is giving error as  Exception
java.net.MalformedURLException: unknown protocol: httpg

After searching in the google , I tried adding the following in the apache
server.xml file

1)

 Connector className=org.apache.catalina.connector.http.HttpConnector
 port=8444 minProcessors=5 maxProcessors=75
 enableLookups=true authenticate=true
 acceptCount=10 debug=1 scheme=httpg secure=true
Factory
className=org.globus.tomcat.catalina.net.GSIServerSocketFactory
 cacertdir=/etc/grid-security/certificates
 proxy=/etc/grid-security/hostproxy.pem
 gridMap=/etc/grid-security/grid-mapfile
debug=3/
  /Connector

 Valve className=org.globus.tomcat.coyote.valves.HTTPSValve55 /

2)  In tomcat_dir/bin/catalina.sh file

CLASSPATH=$CLASSPATH:$CATALINA_HOME/bin/bootstrap.jar

CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/cog-jglobus.jar:$CATALINA_HOME/common/lib/log4j-1.2.8.jar:$CATALINA_HOME/common/lib/ogsa.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/xercesImpl.jar:$CATALINA_HOME/common/endorsed/xmlsec.jar:$CATALINA_HOME/common/lib/xalan.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/puretls.jar:$CATALINA_HOME/common/lib/jce-jdk13-120.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/cryptix32.jar:$CATALINA_HOME/common/lib/cryptix-asn1.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/cryptix.jar:$CATALINA_HOME/common/lib/saag.jar:$CATALINA_HOME/common/lib/wsdl4j.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/Berkeley.StorageResourceManager-client-api.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/Berkeley.StorageResourceManager-client-stub.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/Berkeley.StorageResourceManager-client-samples.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/cryptix.jar:$CATALINA_HOME/common/lib/axis.jar:$CATALINA_HOME/common/lib/cog-axis.jar
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/commons-discovery.jar:$CATALINA_HOME/common/lib/commons-logging.jar:$CATALINA_HOME/common/lib/jaxrpc.jar

3) In tomcat_dir/bin/setclasspath.sh file
appended the line :
CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib/cog-url.jar

4) Even I have copied all the globus-4.0.7 lib  jar files to
tomcat_dir/common/lib directory also


I was not clear about this configuration with tomcat ( I am new to tomcat
server usage ), what are the changes to be done on the server and client
side of the deployed service , Please help me to configure the tomcat server
to support httpg protocol ?


Thanks  Regards,
shashidhar

Re: hanging threads on Tomcat

[Patrick Plaatje]

Thanks for the swift replies, i have two dump, appr a few seconds apart 
uploaded to:


http://www.ipros.nl/uploads/catalina_stripped_1.out
http://www.ipros.nl/uploads/catalina_stripped_2.out

Thanx,

Patrick


Mark Thomas schreef:

Patrick Plaatje wrote:
  

Hi all,

on one of our websites we have a problem with threads keep hanging in
Tomcat. We first noticed this 1.5 week ago and tried several things to
find a solution. At that moment we were using java 1.4 and Tomcat 5.0.
The symptoms were there after three hours of operation, about 250
threads were hanging within tomcat, and they seemed to be waiting for
something.

After a week we realised we needed more information whihc we couldn't
get from the current setup, we upgraded the three production application
servers to be Java 1.5 and Tomcat 5.5.25. All three servers still have
the same problem, although the problem now has an interval of appr. 6
hours instead of three.

During the hanging of the threads we made 8 threaddumps. But i am unsure
of how to read the thread dumps. A small overview of the state of the
threads:

- 309 threads overall
- Threads waiting for monitors: 57
- Threads sleeping on monitors: 191
- Threads locking monitors: 225
- Monitors: 225
- Monitors without locking threads: 3

Can somebody please help me figuring out what the cause is, or how to
find the cause of the problem?



You'll need to provide the thread dumps. Rather than all 8, just two ~15s apart
should suffice.

Mark

  

Best regards,

Patrick

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RE: unkown protocol httpg - using apache-tomcat-6.0.18

[Peter Crowther]

 From: shashidhar velagandula
 I am using apache-tomcat-6.0.18 , I want to access a  SRM(storage
 resource manager) service endpoint which uses httpg protocol
 eg: service endpoint - httpg://srmserver.host:8444/ , by
 deploying a web
 service application using apache-tomcat server

 when a client tries to invoke the service , it is giving
 error as  Exception
 java.net.MalformedURLException: unknown protocol: httpg

That's not surprising - most browsers don't understand httpg:... as a prefix.

Just to check, which of the following do you want to do?

1) Client (browser?) uses http to access a web application running inside 
Tomcat.  Web application redirects client to a httpg: resource.  Browser uses 
httpg to access that resource.

2) Client (browser?) uses http to access a web application running inside 
Tomcat.  Web application accesses the httpg: resource internally, forms a 
response to the browser, and replies to the browser using http.

3) Client (browser?) uses httpg to access a web application running inside 
Tomcat.

4) Something else - in which case please tell us what!


1 and 2 require no changes to Tomcat's configuration files.  3 does, but Tomcat 
doesn't support a httpg connector so you'd have to write your own.  1 and 3 
require the client to understand httpg, which browsers don't.

I *think* you're trying to do 2, in which case you need to write/buy the 
appropriate web application to deploy, and make sure its configuration files 
are set up so that it knows to contact httpg://srmserver.host:8444/ to reach 
the SRM endpoint.  If you're writing it, 
http://www.mail-archive.com/users@tomcat.apache.org/msg34996.html may be 
relevant - the webapp will have to be quite careful in how it registers the 
protocol handler.

If you're trying to do something else, post more details to the list and we may 
be able to help!

- Peter

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Fwd: Cookie not being set

[Andromeda Mobile]

My apologies for re-submitting this but I'm getting a little desperate
here. If no one here can assist can anyone suggest where else I could
go for help?


-- Forwarded message --
From: Michael Farah andromedamob...@gmail.com
Date: Mon, Mar 9, 2009 at 7:58 AM
Subject: Cookie not being set
To: users@tomcat.apache.org


Hi all

I’m running two web apps off a single instance of Tomcat 6.0.1.8 on a CentOS
64 bit OS. Tomcat is fronted with Apache 2.2 and I’m using mod_proxy_http.
Both applications are wap sites.

I’ve been trying to implement an analytics solution provided by Admob. The
solution uses a pixel image in conjunction with a  cookie to provide
detailed user info. Similar to Google analytics but without the Javascript.
Admob provides the code in multiple formats including Java.
The problem is that the cookie is not being set. I have been back and forth
with Admob and they are adamant that the problem lies in our enviroment.
Below is my Virtual Host config;

VirtualHost 211.111.111.111:80
    ServerName sitea.com
    ServerAlias www.sitea.com
    DocumentRoot /home/sitea
    ProxyPass / http://tomcatserver.com:8080/sitea/
    ProxyPassReverse / http://tomcatserver.com:8080/sitea/
    ProxyPassReverseCookieDomain tomcatserver.com site.com
/VirtualHost

The Admob code is a JSP file named AdMob.jsp that is imported into each page
of our webapp via this code snippet
jsp:include page=/AdMob.jsp/

The AdMob.jsp file is pretty big so I won’t pase it all here except for two
snippets which I feel are most relevant. The first is this one;

admobRequiredParams.put(COOKIE_DOMAIN, sitea.com); // If your mobile
site uses multiple subdomains, replace null with your root domain (e.g.
example.com) to make the AdMob cookie visible across subdomains.

The second is the code that sets the cookie;

private String admobGetCookieValue(HttpServletRequest request,
HttpServletResponse response, PageContext pageContext, String cookieDomain)
{
  try {
    Cookie cookies[] = request.getCookies();
    if (cookies != null) {
  for (int i = 0; i  cookies.length; i++) {
    if (cookies[i].getName().equals(admobuu)) return
cookies[i].getValue();
  }
    }

    // Set a cookie if one has not already been set
    if (pageContext.getAttribute(admobCookie) == null) {
  String value = UUID.randomUUID().toString().replace(-,);
  Cookie c = new Cookie(admobuu, value);
  c.setMaxAge(60*60*24*365*20);
  c.setPath(/);
  if (cookieDomain != null) {
    if (cookieDomain.charAt(0) != '.') cookieDomain = . +
cookieDomain;
    c.setDomain(cookieDomain);
  }
  response.addCookie(c);
  pageContext.setAttribute(admobCookie, value);
    }
    return (String)pageContext.getAttribute(admobCookie);
  }
  catch (Exception e) {
    return ;
  }
}

When accessing sitea.com via Firefox with Live HTTP headers, it’s clear that
the cookie is not being set as it doesn’t come shop up. However there is
another cookie being set which I don’t recognise;

Cookie: an=Af4ab27e8d16fb4ac50f73d03fe54c132

Can anyone please assist in explaining why this AdMob cookie is not being
set?

Thanks in advance
Michael

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Fwd: Cookie not being set

[Andromeda Mobile]

There was a typo in the code below which has now been corrected


-- Forwarded message --
From: Michael Farah andromedamob...@gmail.com
Date: Mon, Mar 9, 2009 at 7:58 AM
Subject: Cookie not being set
To: users@tomcat.apache.org


Hi all

I’m running two web apps off a single instance of Tomcat 6.0.1.8 on a CentOS
64 bit OS. Tomcat is fronted with Apache 2.2 and I’m using mod_proxy_http.
Both applications are wap sites.

I’ve been trying to implement an analytics solution provided by Admob. The
solution uses a pixel image in conjunction with a  cookie to provide
detailed user info. Similar to Google analytics but without the Javascript.
Admob provides the code in multiple formats including Java.
The problem is that the cookie is not being set. I have been back and forth
with Admob and they are adamant that the problem lies in our enviroment.
Below is my Virtual Host config;

VirtualHost 211.111.111.111:80
    ServerName sitea.com
    ServerAlias www.sitea.com
    DocumentRoot /home/sitea
    ProxyPass / http://tomcatserver.com:8080/sitea/
    ProxyPassReverse / http://tomcatserver.com:8080/sitea/
    ProxyPassReverseCookieDomain tomcatserver.com sitea.com
/VirtualHost

The Admob code is a JSP file named AdMob.jsp that is imported into each page
of our webapp via this code snippet
jsp:include page=/AdMob.jsp/

The AdMob.jsp file is pretty big so I won’t pase it all here except for two
snippets which I feel are most relevant. The first is this one;

admobRequiredParams.put(COOKIE_DOMAIN, sitea.com); // If your mobile
site uses multiple subdomains, replace null with your root domain (e.g.
example.com) to make the AdMob cookie visible across subdomains.

The second is the code that sets the cookie;

private String admobGetCookieValue(HttpServletRequest request,
HttpServletResponse response, PageContext pageContext, String cookieDomain)
{
  try {
    Cookie cookies[] = request.getCookies();
    if (cookies != null) {
  for (int i = 0; i  cookies.length; i++) {
    if (cookies[i].getName().equals(admobuu)) return
cookies[i].getValue();
  }
    }

    // Set a cookie if one has not already been set
    if (pageContext.getAttribute(admobCookie) == null) {
  String value = UUID.randomUUID().toString().replace(-,);
  Cookie c = new Cookie(admobuu, value);
  c.setMaxAge(60*60*24*365*20);
  c.setPath(/);
  if (cookieDomain != null) {
    if (cookieDomain.charAt(0) != '.') cookieDomain = . +
cookieDomain;
    c.setDomain(cookieDomain);
  }
  response.addCookie(c);
  pageContext.setAttribute(admobCookie, value);
    }
    return (String)pageContext.getAttribute(admobCookie);
  }
  catch (Exception e) {
    return ;
  }
}

When accessing sitea.com via Firefox with Live HTTP headers, it’s clear that
the cookie is not being set as it doesn’t come shop up. However there is
another cookie being set which I don’t recognise;

Cookie: an=Af4ab27e8d16fb4ac50f73d03fe54c132

Can anyone please assist in explaining why this AdMob cookie is not being
set?

Thanks in advance
Michael

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RE: Cookie not being set

[Peter Crowther]

 From: Michael Farah andromedamob...@gmail.com
 The Admob code is a JSP file named AdMob.jsp that is imported
 into each page
 of our webapp via this code snippet
 jsp:include page=/AdMob.jsp/
[...]
   response.addCookie(c);

Just a thought... where's your include?  In order to add the cookie (which must 
go in the header), I think no bytes of response must have been sent yet - is 
the include far enough up the file that this is the case?

Or someone more experienced will tell me this isn't a problem with servlets :-).

- Peter

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Re: Effect of Heap Size on Performance?

[Taylan Develioglu]

Chris,

We have 100+ application servers in a loadbalancing (application based, 
not tomcat) setup. If servers are removed from the load balancing pool 
the others need to be able to pick up the load. So the number of 
concurrent users is highly dynamic. You can imagine the problem if we 
keep the heapsize to a minimum on every server. I'm talking about a 
fixed size here ofcourse.


I also don't think the relationship between number of objects and young 
gc duration is a linear one.


Increasing the young generation  leads to longer gc's.  Increasing young 
to 682M on a 4G heap from its default size increased gc time approx. 3-4 
x (47ms average to 154ms average on one server), but it also decreased 
the number of gc's performed by 15-20x.
So eventually, a larger heapsize saved cycles, and subsequently 
increased throughput. At least for us.


I think it also gives short-lived objects (for example short sessions) a 
longer time to 'die out', so they won't be moved to tenure because 
survivor space is increased and gc frequency is decreased (can anyone 
confirm this?).


Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Taylan,

On 3/5/2009 5:11 AM, Taylan Develioglu wrote:
  

I always hold this as a ground rule:

Increase heapsize as much as possible as long as:



My rule has always been to run with the smallest heap you can get away
with. We ran our main production app in 64MB of heap (the default for
our platform) for 4 years before we got our first OOME. Now we run it
with a 192MB heap.

A smaller heap means that you'll catch even small memory leaks faster.
At least, that's my position.

Surprisingly, Chuck hasn't responded (he usually has something to say
about GC/heap myths), but I suspect he'd say something like heap size
itself has little effect on the GC's performance... it's really the
number of objects that affect the performance. Granted, a larger heap
invites more objects into it, but generational garbage collection is
decent enough that the generations rarely grow to such a size that the
app stalls while the GC runs.

- -chris
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.9 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkm2fBAACgkQ9CaO5/Lv0PCPngCfRfClYEVoDAI57VBbqoBUaAC8
RDAAn0fztUgMY0d0K0FAdV0uxYzSjDxN
=EbMZ
-END PGP SIGNATURE-

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Re: Cookie not being set

[Andromeda Mobile]

Hi Peter

The include is actually in the body of the document, right at the
bottom! The thing is the code creates a pixel image and so i wanted to
put this in an area which would not impact the rest of the page. So
should the include be in the head? Do you think this could be the
cause?

Regards
Michael

On Wed, Mar 11, 2009 at 1:44 PM, Peter Crowther
peter.crowt...@melandra.com wrote:
 From: Michael Farah andromedamob...@gmail.com
 The Admob code is a JSP file named AdMob.jsp that is imported
 into each page
 of our webapp via this code snippet
 jsp:include page=/AdMob.jsp/
 [...]
       response.addCookie(c);

 Just a thought... where's your include?  In order to add the cookie (which 
 must go in the header), I think no bytes of response must have been sent yet 
 - is the include far enough up the file that this is the case?

 Or someone more experienced will tell me this isn't a problem with servlets 
 :-).

                - Peter

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Re: Cookie not being set

[David Smith]

Cookies are sent in the header and tomcat does not wait for the entire
body of the response before starting to send.  It just waits for a
buffer to fill up and sends as soon as that occurs.  You should be
setting the cookie asap or at least before the first block of response
goes out on the wire.

--David

Andromeda Mobile wrote:
 Hi Peter

 The include is actually in the body of the document, right at the
 bottom! The thing is the code creates a pixel image and so i wanted to
 put this in an area which would not impact the rest of the page. So
 should the include be in the head? Do you think this could be the
 cause?

 Regards
 Michael

 On Wed, Mar 11, 2009 at 1:44 PM, Peter Crowther
 peter.crowt...@melandra.com wrote:
   
 From: Michael Farah andromedamob...@gmail.com
 The Admob code is a JSP file named AdMob.jsp that is imported
 into each page
 of our webapp via this code snippet
 jsp:include page=/AdMob.jsp/
   
 [...]
 
   response.addCookie(c);
   
 Just a thought... where's your include?  In order to add the cookie (which 
 must go in the header), I think no bytes of response must have been sent yet 
 - is the include far enough up the file that this is the case?

 Or someone more experienced will tell me this isn't a problem with servlets 
 :-).

- Peter

 


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Tomcat 6.x Proxy Authentication

[Alexander Diedler]

Hello, 

We have a Tomcat Application, which has to communicate through a Proxy
Server with authentication. Should be the authentication done in the Java
Class or it is possible to configure Tomcat for Proxy Authentication?

 

Alex

 



smime.p7s
Description: S/MIME cryptographic signature

Problems with LoadBalancing

[Toni Menendez Lopez]

Hello everybody,

I have following architecture :

2 Server with Apache and Tomcat

Versions :
APACHE
-
httpd -v
Server version: Apache/2.0.52
Server built:   May 24 2006 11:45:06

TOMCAT
-
./version.sh
Using JRE_HOME:   /opt/jdk1.5.0_10
Server version: Apache Tomcat/5.5.20
Server built:   Sep 12 2006 10:09:20
Server number:  5.5.20.0
OS Name:Linux
OS Version: 2.6.9-55.0.2.ELsmp
Architecture:   i386
JVM Version:1.5.0_10-b03
JVM Vendor: Sun Microsystems Inc.


I am doing load balancing between both with JK, with an scenario of 50
reques per session (aprox), and 500 reqxseg ( aprox ).

The thing is the following, when I shutdown the passive server, I have a
download of my reqxseg, and the requests that where managed by the passive
server get stucked for long time, like 5 min.

New request afther shutting donw the passive server are well processed.

But the thing is if there is a way to reduce this time that requests are
stucked.

This is my worker :

# izonetv LoadBalancer Definition
worker.izonetv.balance_workers=izonetv-mifeas01_data,izonetv-mifeas02_data
worker.izonetv.method=Session
worker.izonetv.retries=1
worker.izonetv.sticky_session=True
#worker.izonetv.sticky_session_force=1
worker.izonetv.type=lb

# izonetv-mifeas01_data Node Definition
worker.izonetv-mifeas01_data.connect_timeout=1
worker.izonetv-mifeas01_data.fail_on_status=404
worker.izonetv-mifeas01_data.host=mifeas01_data
worker.izonetv-mifeas01_data.lbfactor=1
worker.izonetv-mifeas01_data.port=8009
worker.izonetv-mifeas01_data.reply_timeout=3
worker.izonetv-mifeas01_data.type=ajp13

# izonetv-mifeas02_data Node Definition
worker.izonetv-mifeas02_data.connect_timeout=1
worker.izonetv-mifeas02_data.fail_on_status=404
worker.izonetv-mifeas02_data.host=mifeas02_data
worker.izonetv-mifeas02_data.lbfactor=1
worker.izonetv-mifeas02_data.port=8009
worker.izonetv-mifeas02_data.reply_timeout=3
worker.izonetv-mifeas02_data.type=ajp13
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Regarding Tomcat 5.5 clustering

[welcome.partha]

Hi Everyone,
   Now i am trying to creating the clustering in
tomcat5.5.17. I have downloaded tomcat 5.5.17.In server.xml i made some
changes.Herewith I have uploaded the server.xml.Then I have downloaded
another tomcat 5.5.17.In that server.xml i made some changes.I have uploaded
that server.xml also.i started my first tomcat instance.after that i started
my second one that time i am getting the replication member added message in
tomcat one.If i close the second one that time i am getting replication
member disappeared.How should i check my application is working with cluster
is fine or not.and if i put my application in one tomcat instance of webapps
folder or both?thanks in advance.


Regards,
P.Parthasarathi
http://www.nabble.com/file/p22454690/server.xml server.xml 
http://www.nabble.com/file/p22454690/server.xml server.xml 


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Re: Cookie not being set

[Andromeda Mobile]

I tried moving the include to the head of my document but this does
not appear to have made any difference. Must it be in the head or
should it be even above this?

On Wed, Mar 11, 2009 at 2:16 PM, David Smith d...@cornell.edu wrote:
 Cookies are sent in the header and tomcat does not wait for the entire
 body of the response before starting to send.  It just waits for a
 buffer to fill up and sends as soon as that occurs.  You should be
 setting the cookie asap or at least before the first block of response
 goes out on the wire.

 --David

 Andromeda Mobile wrote:
 Hi Peter

 The include is actually in the body of the document, right at the
 bottom! The thing is the code creates a pixel image and so i wanted to
 put this in an area which would not impact the rest of the page. So
 should the include be in the head? Do you think this could be the
 cause?

 Regards
 Michael

 On Wed, Mar 11, 2009 at 1:44 PM, Peter Crowther
 peter.crowt...@melandra.com wrote:

 From: Michael Farah andromedamob...@gmail.com
 The Admob code is a JSP file named AdMob.jsp that is imported
 into each page
 of our webapp via this code snippet
 jsp:include page=/AdMob.jsp/

 [...]

       response.addCookie(c);

 Just a thought... where's your include?  In order to add the cookie (which 
 must go in the header), I think no bytes of response must have been sent 
 yet - is the include far enough up the file that this is the case?

 Or someone more experienced will tell me this isn't a problem with servlets 
 :-).

                - Peter




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RE: Cookie not being set

[Peter Crowther]

 From: Andromeda Mobile [mailto:andromedamob...@gmail.com]
 I tried moving the include to the head of my document but this does
 not appear to have made any difference. Must it be in the head or
 should it be even above this?

Ideally it would be wherever AdMob's documentation says it should appear, as I 
would assume they have at least tested their JSP implementation in the popular 
servlet containers.  Where does it suggest?

Assuming the JSP emits the HTML markup for an image at whatever point it is 
included, the earliest realistic point to include it would be after the body 
tag.

- Peter

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Re: Cookie not being set

[André Warnier]

Peter Crowther wrote:

From: Andromeda Mobile [mailto:andromedamob...@gmail.com]
I tried moving the include to the head of my document but this does
not appear to have made any difference. Must it be in the head or
should it be even above this?


Ideally it would be wherever AdMob's documentation says it should appear, as I 
would assume they have at least tested their JSP implementation in the popular 
servlet containers.  Where does it suggest?

Assuming the JSP emits the HTML markup for an image at whatever point it is 
included, the earliest realistic point to include it would be after the body 
tag.

This is a bit of a shot from the hip, but I think that if you are trying 
to set this cookie header too late in the cycle, you may get some error 
message in the logs like response already committed.  It's probably 
worth checking anyway.


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RE: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

[Alston, Brian (US SSA)]

Ok ... I feel like a moron but I cannot figure out how to use 
disablereuse option. When I google for examples on disablereuse, what I 
find is that in my httpd.conf file I need to add the line JkOptions 
+DisableReuse. However, reading the information here 
(http://httpd.apache.org/docs/2.2/mod/mod_proxy.html) it looks like I need to 
add disablereuse=On  to the end of the line BalancerMember 
http://192.168.1.101:8080 loadfactor=1. I am extremely new at this Tomcat 
clustering process, so any leniency and help will be very much appreciated.

Thanks

Have a great day.


From: Filip Hanik - Dev Lists [devli...@hanik.com]
Sent: Tuesday, March 10, 2009 1:22 PM
To: Tomcat Users List
Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

Alston, Brian (US SSA) wrote:
 Filip

 Thank you for your help. I made the changes like you suggested:

 changed stickysession-jsessionid to 
 stickysession=JSESSIONID|jsessionid
 I already had stickysession=jsessionid (it was a typo here in my 
 post) but I added the pipe and uppercase JSESSIONID

 my server.xml already had the line you suggested.

 If I use disablereuse=On won't I then have problems with my cookies 
 and sessions?

disable reuse will not affect your cookies or sessions

Filip
 Again, thank you very much for your help.

 
 From: Filip Hanik - Dev Lists [devli...@hanik.com]
 Sent: Tuesday, March 10, 2009 12:42 PM
 To: Tomcat Users List
 Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

 hi Brian,
 your stickysession attribute is wrong, it should look like

 |stickysession=JSESSIONID|jsessionid

 then you must set jvmRoute in server.xml (Engine name=xxx
 jvmRoute=tc1) the jvmRoute has to be unique across the tc nodes.
 stickyness will only apply to request that have sessions

 remove smax/max, better to use the defaults

 I would also set the property disablereuse to On if it is supported in
 your httpd version, right now it may try to use a connection that is
 dead, and it seems its not trying another node, there may be some other
 attributes that can help with that too

 documentation is here
 http://httpd.apache.org/docs/2.2/mod/mod_proxy.html

 Filip

 |Alston, Brian (US SSA) wrote:

 Like the example in the book, I created a file called 
 proxy-balancer.conf and put it in the conf.d directory. Here is what the 
 file looks like (I retyped it so there may be mistakes):

 IfModule !proxy_module
 LoadModule proxy_module modules/mod_proxy.so
 /IfModule

 # IfModule !proxy_ajp_module
 # LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
 # /IfModule

 IfModule !proxy_http_module
 LoadModule proxy_http_module modules/mod_proxy_http.so
 /IfModule

 IfModule !proxy_balancer_module
 LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
 /IfModule

 IfModule !status_module
 LoadModule status_module modules/mod_status.so
 /IfModule

 IfModule !proxy_balancer_module
 ProxyRequests Off

 Proxy balancer://tccluster
 BalancerMember http://192.168.1.101:8080 loadfactor=1 max=150 smax=145
 BalancerMember http://192.168.1.102:8080 loadfactor=1 max=150 smax=145
 BalancerMember http://192.168.1.103:8080 loadfactor=1 max=150 smax=145
 Order Deny,Allow
 Allow from all
 /Proxy

 Location /balancer-manager
 SetHandler balancer-manager
 Order Deny,Allow
 Allow from all
 /Location

 Location /my-webapp
 ProxyPass balancer://tccluster/my-webapp stickysession-jsessionid
 ProxyPassReverse balancer://tccluster/my-webapp
 Order Deny,Allow
 Allow from all
 /Location

 Location /examples
 ProxyPass balancer://tccluster/examples stickysession-jsessionid
 ProxyPassReverse balancer://tccluster/examples
 Order Deny,Allow
 Allow from all
 /Location

 /IfModule

 
 From: Filip Hanik - Dev Lists [devli...@hanik.com]
 Sent: Tuesday, March 10, 2009 11:29 AM
 To: Tomcat Users List
 Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

 what does the cluster section of your httpd look like?

 Alston, Brian (US SSA) wrote:


 I have one Apache http server version 2.2.3  (on Red Hat Enterprise Linux 
 5) and three Tomcat 6 version 6.0.18 servers (on Windows Server 2003) 
 running in my cluster. Everything appears to be working well. It looks 
 like it is using RoundRobin because every time I refresh the page it goes 
 from web001 - web002 - web003 - web001 - etc. I used some of the 
 examples that are provided with Tomcat in the examples directory - 
 specifically the Sessions servlet and it looks like my sessions are 
 staying the same and holding information. My issue is this. When I stop one 
 of the Tomcat servers (let's say web002), I will sometimes get the 
 following error message when I refresh the page:

 - - - - - - - - - -

 Proxy Error

 The proxy server received an invalid response from an upstream server.
 The proxy server could not handle the request GET 

RE: Effect of Heap Size on Performance?

[Caldarale, Charles R]

 From: Taylan Develioglu [mailto:tdevelio...@ebuddy.com] 
 Subject: Re: Effect of Heap Size on Performance?
 
 I think it also gives short-lived objects (for example short 
 sessions) a longer time to 'die out', so they won't be moved
 to tenure because survivor space is increased and gc frequency
 is decreased (can anyone confirm this?).

That is the expected effect of having a larger young generation and consequent 
larger eden and survivor spaces.  However, there is a cost of deferring the 
migration of long-lived objects to tenured: they must be copied from one 
survivor space to the other on each minor GC, whereas once in tenured, they do 
not move until a full GC occurs (and perhaps not even then).

It's often cheaper to throw hardware at a performance problem than to do the 
painstaking analysis of GC behavior and gain the few percentage points of 
improvement that will bring.

 - Chuck


THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY 
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RE: hanging threads on Tomcat

[Caldarale, Charles R]

 From: Patrick Plaatje [mailto:patr...@ipros.nl] 
 Subject: hanging threads on Tomcat
 
 - 309 threads overall
 - Threads waiting for monitors: 57
 - Threads sleeping on monitors: 191
 - Threads locking monitors: 225
 - Monitors: 225
 - Monitors without locking threads: 3

Haven't looked at your thread dumps yet, but you might try using JConsole; it 
has an interesting looking Detect Deadlocks button on the Threads tab that 
may show you something useful.

 - Chuck


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RE: Tomcat for Dummies

[Caldarale, Charles R]

 From: André Warnier [mailto:a...@ice-sa.com] 
 Subject: Re: Tomcat for Dummies
 
 If I am not abusing, how does it do that, schematically ?
 I presume it has a more direct way than to itself isue a 
 HTTP request to the Manager webapp with the appropriate
 parameters ?

No, the HTTP request would be the simplest approach.  There's likely a JMX call 
that could be done, but it would be more work.  Certainly there are internal 
APIs that could be used, but those are subject to change at any time, and are 
normally not available to regular webapps.

 And if it asks to undeploy itself, is it not like pulling 
 the carpet from under its own feet ?  I mean, this webapp 
 is running, and even after asking the Manager to undeploy 
 itself (meaning its whole shebang of classes and libs will
 be erased from the disk), it should be able to still stop 
 itself cleanly.

That should be handled by a ServletContextListener declared in WEB-INF/web.xml, 
which will be invoked before the deletion of the webapp's files.

 - Chuck


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RE: hanging threads on Tomcat

[Caldarale, Charles R]

 From: Patrick Plaatje [mailto:patr...@ipros.nl] 
 Subject: Re: hanging threads on Tomcat
 
 Thanks for the swift replies, i have two dump, appr a few 
 seconds apart uploaded to:

You appear to be out of database connections.  This is almost always caused by 
webapp code not disposing of result sets, statements, and connections properly, 
leading to exhaustion of the pool.  The proper technique is to insure that 
every place that obtains a connection also has a finally block that will close 
all the resources associated with the connection, including the connection 
itself.

This is a common discussion topic, so you can search the archives for examples. 
 Also look at the Tomcat doc for recommended practice and how to detect (and 
work around) lost connections:
http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html

 - Chuck


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Re: hanging threads on Tomcat

[Oliver Schoett]

Patrick Plaatje wrote:
Thanks for the swift replies, i have two dump, appr a few seconds 
apart uploaded to:


http://www.ipros.nl/uploads/catalina_stripped_1.out
http://www.ipros.nl/uploads/catalina_stripped_2.out


Many threads appear to be waiting on the same instance of 
org.apache.tomcat.dbcp.pool.impl.GenericObjectPool in 
org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection, while I can 
see only 4 threads actually doing database work.


Is it possible that you have configured too few database connections? 
(If the current limit is 4, try 20.)


A second point of contention looks like

at neo.util.Mutex.aquire(Mutex.java:77)
at 
neo.xredsys.presentation.ArticlePresentationManager.getArticle(ArticlePresentationManager.java:200)
at 
neo.xredsys.presentation.ArticlePresentationManager.getArticle(ArticlePresentationManager.java:169)
at 
neo.xredsys.presentation.ArticlePresentationManager.getArticle(ArticlePresentationManager.java:149)


But this may be a property of the software you use and harder to change.

Regards,

Oliver Schoett



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Re: [OT] Tomcat for Dummies

[André Warnier]

Caldarale, Charles R wrote:
[...]



That should be handled by a ServletContextListener declared in WEB-INF/web.xml, 
which will be invoked before the deletion of the webapp's files.

At the risk of sounding heretical and tasteless on this forum, I must 
admit that this whole Java and Tomcat thing sometimes sounds to me like 
a giant job-preservation scheme.
Which in the current circumstances may be a socially worthwhile thing to 
be...

;-)

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Re: Tomcat for Dummies

[André Warnier]

Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com] 
Subject: Re: Tomcat for Dummies


If I am not abusing, how does it do that, schematically ?
I presume it has a more direct way than to itself isue a 
HTTP request to the Manager webapp with the appropriate

parameters ?


No, the HTTP request would be the simplest approach.  There's likely a JMX call 
that could be done, but it would be more work.  Certainly there are internal 
APIs that could be used, but those are subject to change at any time, and are 
normally not available to regular webapps.

And if it asks to undeploy itself, is it not like pulling 
the carpet from under its own feet ?  I mean, this webapp 
is running, and even after asking the Manager to undeploy 
itself (meaning its whole shebang of classes and libs will
be erased from the disk), it should be able to still stop 
itself cleanly.


That should be handled by a ServletContextListener declared in WEB-INF/web.xml, 
which will be invoked before the deletion of the webapp's files.


More seriously thus, there seems to be a problem with this logic :
Suppose we have a case where 5 instances of this webapp are currently 
running, and one of them issues a request to the Manager, to undeploy 
itself.  The Manager would then oblige, and start undeploying the 
webapp.  The ServletContextListener in each of the running webapp 
instances would be called, before the Manager does anything drastic. 
Presumably then each ServletContextListener instance would have to take 
some action to force the corresponding webapp instance to stop and 
cleanup its act, and also presumably the Manager would wait for each of 
these instances to return some form of OK, before it proceeds with 
erasing the webapps files.

But is that really what happens ?
I feel somewhat uncomfortable with the above scheme, more out of a gut 
feeling than anything else.  Am I wrong ?


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RE: Tomcat for Dummies

[Peter Crowther]

 From: André Warnier [mailto:a...@ice-sa.com]
 Caldarale, Charles R wrote:
  That should be handled by a ServletContextListener declared
 in WEB-INF/web.xml, which will be invoked before the deletion
 of the webapp's files.
 
 More seriously thus, there seems to be a problem with this logic :
 Suppose we have a case where 5 instances of this webapp are currently
 running

You can't have 5 instances of one webapp, to my knowledge.  You have one.  
But I may not have seen some of the odder deployment scenarios.

 and one of them issues a request to the Manager, to undeploy
 itself.  The Manager would then oblige, and start undeploying the
 webapp.  The ServletContextListener in each

(i.e. the only one)

 of the running webapp
 instances would be called, before the Manager does anything drastic.
 Presumably then each ServletContextListener instance would
 have to take
 some action to force the corresponding webapp instance to stop and
 cleanup its act, and also presumably the Manager would wait
 for each of
 these instances to return some form of OK, before it proceeds with
 erasing the webapps files.

The file erase would not happen until the listener had returned.  To my 
knowledge, that's the only guarantee you get with such a listener.

- Peter

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Re: Tomcat for Dummies

[Ken Bowen]

Let's be frugal and use just 2 instances of a webapp.
How do you run 2 instances of a webapp?
You must deploy them.  How do you do that?
You drop a war file for each into webapps.
Whoa!   Did you drop 2 copies of myapp.war into webapps?
You can't do that.  If they are both named myapp.war, when you drop in  
the 2nd one, it overwrites the first.
Ok.  So you name them myapp1.war and myapp2.war, and drop them both in  
webapps.
Cool.  In one sense they both look like the same webapp, but they are  
different entities from Tomcat's point of view.
So if you use the manager to stop myapp1,  nothing will happens to  
myapp2  -- it is totally physically distinct from myapp1.


Ergo Watson, we've solved the morning star/evening star paradox.

--Ken

On Mar 11, 2009, at 10:39 AM, André Warnier wrote:


Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com] Subject: Re: Tomcat for  
Dummies


If I am not abusing, how does it do that, schematically ?
I presume it has a more direct way than to itself isue a HTTP  
request to the Manager webapp with the appropriate

parameters ?
No, the HTTP request would be the simplest approach.  There's  
likely a JMX call that could be done, but it would be more work.   
Certainly there are internal APIs that could be used, but those are  
subject to change at any time, and are normally not available to  
regular webapps.
And if it asks to undeploy itself, is it not like pulling the  
carpet from under its own feet ?  I mean, this webapp is running,  
and even after asking the Manager to undeploy itself (meaning its  
whole shebang of classes and libs will
be erased from the disk), it should be able to still stop itself  
cleanly.
That should be handled by a ServletContextListener declared in WEB- 
INF/web.xml, which will be invoked before the deletion of the  
webapp's files.

More seriously thus, there seems to be a problem with this logic :
Suppose we have a case where 5 instances of this webapp are  
currently running, and one of them issues a request to the Manager,  
to undeploy itself.  The Manager would then oblige, and start  
undeploying the webapp.  The ServletContextListener in each of the  
running webapp instances would be called, before the Manager does  
anything drastic. Presumably then each ServletContextListener  
instance would have to take some action to force the corresponding  
webapp instance to stop and cleanup its act, and also presumably the  
Manager would wait for each of these instances to return some form  
of OK, before it proceeds with erasing the webapps files.

But is that really what happens ?
I feel somewhat uncomfortable with the above scheme, more out of a  
gut feeling than anything else.  Am I wrong ?


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Re: Tomcat Clustering trouble when starting up under high load

[Filip Hanik - Dev Lists]

hi Mikel,
when setting a property on the Manager you omit the manager. prefix, 
just as you stated.
To do thread dumps with JDK 1.5 under windows, you can use the tanuki 
service wrapper

http://people.apache.org/~fhanik/wrapper.html

The tomcat team might have added that feature to the Tomcat wrapper too, 
you'd have to check


Filip




Mikel Ibiricu wrote:

Hi Rainer, thanks for your response.

I tried the config you suggested. It suppose the way of configuring those
parameters is as you said, but skipping manager. from the begining, as
when I tried as you said, I got this in the catalina. log:

10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin
ADVERTENCIA: [SetPropertiesRule]{Server/Service/Engine/Cluster/Manager}
Setting property 'manager.sendAllSessions' to 'false' did not find a
matching property.
10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin
ADVERTENCIA: [SetPropertiesRule]{Server/Service/Engine/Cluster/Manager}
Setting property 'manager.sendAllSessionsSize' to '200' did not find a
matching property.
10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin
ADVERTENCIA: [SetPropertiesRule]{Server/Service/Engine/Cluster/Manager}
Setting property 'manager.sendAllSessionsWaitTime' to '0' did not find a
matching property.
10-mar-2009 15:58:19 org.apache.tomcat.util.digester.SetPropertiesRule begin

Maybe without the manager prefix? sendAllSessions=false,
sendAllSessionSize=200 and sendAllSessionsWaitTime=?

Filip, we consider taking thead dumps, but we are using jdk 1.5 under
windows. I heard it is not supported in Windows until jdk 1.6. Is it true?

Best regards
Mikel



2009/3/9 Rainer Jung rainer.j...@kippdata.de

  

On 09.03.2009 09:24, Mikel Ibiricu wrote:



So, It works OK but when starting up one of the nodes with over 500
sessions
alive in the other, it doesn't replicate anything. We assume that it would
not be able to replicate everything... but why it does either replicate
everything or nothing? If it's not able replicate all the sessions, we
would
assume it, but we would like to replicate at least something... Maybe some
trouble with the config we are trying? We tried to limit the
keepAliveCount
of the senders, without improvement with this.

Reading the DeltaManager code, I have seen the sendAlllSessions parameter.
According to in-line javadoc and the implementation,

/**
 * handle receive that other node want all sessions ( restart )
 * a) send all sessions with one message
 * b) send session at blocks
 * After sending send state is complete transfered
 * @param msg
 * @param sender
 * @throws IOException
 */
protected void handleGET_ALL_SESSIONS(SessionMessage msg, Member
sender)
throws IOException {

[...]

if (isSendAllSessions()) {
sendSessions(sender, currentSessions, findSessionTimestamp);
} else {
// send session at blocks
int len = currentSessions.length  getSendAllSessionsSize() ?
currentSessions.length : getSendAllSessionsSize();
Session[] sendSessions = new Session[len];
for (int i = 0; i  currentSessions.length; i +=
getSendAllSessionsSize()) {
len = i + getSendAllSessionsSize()
 currentSessions.length
? currentSessions.length - i : getSendAllSessionsSize();
System.arraycopy(currentSessions, i, sendSessions, 0,
len);
sendSessions(sender, sendSessions,findSessionTimestamp);
if (getSendAllSessionsWaitTime()  0) {
try {
Thread.sleep(getSendAllSessionsWaitTime());
} catch (Exception sleep) {
}
}//end if
}//for
}//end if

SessionMessage newmsg = new
SessionMessageImpl(name,SessionMessage.EVT_ALL_SESSION_TRANSFERCOMPLETE,
null,SESSION-STATE-TRANSFERED, SESSION-STATE-TRANSFERED+ getName());
newmsg.setTimestamp(findSessionTimestamp);
if (log.isDebugEnabled())

log.debug(sm.getString(deltaManager.createMessage.allSessionTransfered,getName()));
counterSend_EVT_ALL_SESSION_TRANSFERCOMPLETE++;
cluster.send(newmsg, sender);
}

it may cover our expectatives, so I tried to include
sendAllSessions=false
in the cluster manager configuration

Manager className=org.apache.catalina.ha.session.DeltaManager
   name=clusterPruebas6
   stateTransferTimeout=180
   expireSessionsOnShutdown=false
   notifyListenersOnReplication=false
   sendAllSessions=false/

But it seems like this parameter is not configurable from the server.xml
file. So, what can I do to force that if it's not posible to replicate all
the sessions, at least replicate something in the startup?

  

If you want to test with sendAllSessions set to false, then add

manager.sendAllSessions=false

to the Manager element of the 

Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

[Filip Hanik - Dev Lists]

hi Brian, this is not really tomcat clustering, but more httpd load 
balancing. Disable reuse is available on two modules, mod_jk and 
mod_proxy, that is why you get hits for mod_jk as well when you google.
syntax is case sensitive, and yes, you would add it to the end of the 
BalancerMember


Filip

Alston, Brian (US SSA) wrote:

Ok ... I feel like a moron but I cannot figure out how to use disablereuse option. When I google for examples on 
disablereuse, what I find is that in my httpd.conf file I need to add the line JkOptions +DisableReuse. 
However, reading the information here (http://httpd.apache.org/docs/2.2/mod/mod_proxy.html) it looks like I need to add 
disablereuse=On  to the end of the line BalancerMember http://192.168.1.101:8080 loadfactor=1. I am 
extremely new at this Tomcat clustering process, so any leniency and help will be very much appreciated.

Thanks

Have a great day.


From: Filip Hanik - Dev Lists [devli...@hanik.com]
Sent: Tuesday, March 10, 2009 1:22 PM
To: Tomcat Users List
Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

Alston, Brian (US SSA) wrote:
  

Filip

Thank you for your help. I made the changes like you suggested:

changed stickysession-jsessionid to 
stickysession=JSESSIONID|jsessionid
I already had stickysession=jsessionid (it was a typo here in my post) but I added the 
pipe and uppercase JSESSIONID

my server.xml already had the line you suggested.

If I use disablereuse=On won't I then have problems with my cookies 
and sessions?



disable reuse will not affect your cookies or sessions

Filip
  

Again, thank you very much for your help.


From: Filip Hanik - Dev Lists [devli...@hanik.com]
Sent: Tuesday, March 10, 2009 12:42 PM
To: Tomcat Users List
Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

hi Brian,
your stickysession attribute is wrong, it should look like

|stickysession=JSESSIONID|jsessionid

then you must set jvmRoute in server.xml (Engine name=xxx
jvmRoute=tc1) the jvmRoute has to be unique across the tc nodes.
stickyness will only apply to request that have sessions

remove smax/max, better to use the defaults

I would also set the property disablereuse to On if it is supported in
your httpd version, right now it may try to use a connection that is
dead, and it seems its not trying another node, there may be some other
attributes that can help with that too

documentation is here
http://httpd.apache.org/docs/2.2/mod/mod_proxy.html

Filip

|Alston, Brian (US SSA) wrote:



Like the example in the book, I created a file called proxy-balancer.conf and put 
it in the conf.d directory. Here is what the file looks like (I retyped it so there may 
be mistakes):

IfModule !proxy_module
LoadModule proxy_module modules/mod_proxy.so
/IfModule

# IfModule !proxy_ajp_module
# LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
# /IfModule

IfModule !proxy_http_module
LoadModule proxy_http_module modules/mod_proxy_http.so
/IfModule

IfModule !proxy_balancer_module
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
/IfModule

IfModule !status_module
LoadModule status_module modules/mod_status.so
/IfModule

IfModule !proxy_balancer_module
ProxyRequests Off

Proxy balancer://tccluster
BalancerMember http://192.168.1.101:8080 loadfactor=1 max=150 smax=145
BalancerMember http://192.168.1.102:8080 loadfactor=1 max=150 smax=145
BalancerMember http://192.168.1.103:8080 loadfactor=1 max=150 smax=145
Order Deny,Allow
Allow from all
/Proxy

Location /balancer-manager
SetHandler balancer-manager
Order Deny,Allow
Allow from all
/Location

Location /my-webapp
ProxyPass balancer://tccluster/my-webapp stickysession-jsessionid
ProxyPassReverse balancer://tccluster/my-webapp
Order Deny,Allow
Allow from all
/Location

Location /examples
ProxyPass balancer://tccluster/examples stickysession-jsessionid
ProxyPassReverse balancer://tccluster/examples
Order Deny,Allow
Allow from all
/Location

/IfModule


From: Filip Hanik - Dev Lists [devli...@hanik.com]
Sent: Tuesday, March 10, 2009 11:29 AM
To: Tomcat Users List
Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

what does the cluster section of your httpd look like?

Alston, Brian (US SSA) wrote:


  

I have one Apache http server version 2.2.3  (on Red Hat Enterprise Linux 5) and three Tomcat 6 version 6.0.18 servers 
(on Windows Server 2003) running in my cluster. Everything appears to be working well. It looks like it is 
using RoundRobin because every time I refresh the page it goes from web001 - web002 - web003 - web001 - 
etc. I used some of the examples that are provided with Tomcat in the examples directory - specifically the 
Sessions servlet and it looks like my sessions are staying the same and holding information. My issue is 
this. When I stop one of the Tomcat servers (let's 

Re: Regarding Tomcat 5.5 clustering

[Filip Hanik - Dev Lists]

to test failover

setup a simple load balancer, like 'pen' or more advanced like the 
apache web server 'httpd'

and hit the load balancer with requests

Filip

welcome.partha wrote:

Hi Everyone,
   Now i am trying to creating the clustering in
tomcat5.5.17. I have downloaded tomcat 5.5.17.In server.xml i made some
changes.Herewith I have uploaded the server.xml.Then I have downloaded
another tomcat 5.5.17.In that server.xml i made some changes.I have uploaded
that server.xml also.i started my first tomcat instance.after that i started
my second one that time i am getting the replication member added message in
tomcat one.If i close the second one that time i am getting replication
member disappeared.How should i check my application is working with cluster
is fine or not.and if i put my application in one tomcat instance of webapps
folder or both?thanks in advance.


Regards,
P.Parthasarathi
http://www.nabble.com/file/p22454690/server.xml server.xml 
http://www.nabble.com/file/p22454690/server.xml server.xml 



  



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RE: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

[Alston, Brian (US SSA)]

Filip

I was under the assumption, from my reading, that load balancing was a 
component of clustering. At least that's how the O'Reilly book makes me feel.

I added the option to the end of the line and it now looks like this:

BalancerMember http://192.168.1.101:8080 loadfactor=1 disablereuse=On
BalancerMember http://192.168.1.102:8080 loadfactor=1 disablereuse=On
BalancerMember http://192.168.1.103:8080 loadfactor=1 disablereuse=On

I restarted Apache and got the following error:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Starting httpd: Syntax error on line 25 of 
/etc/httpd/conf.d/proxy-balancer.conf:
BalancerMember unknown Worker parameter
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Thank you


From: Filip Hanik - Dev Lists [devli...@hanik.com]
Sent: Wednesday, March 11, 2009 11:10 AM
To: Tomcat Users List
Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

hi Brian, this is not really tomcat clustering, but more httpd load
balancing. Disable reuse is available on two modules, mod_jk and
mod_proxy, that is why you get hits for mod_jk as well when you google.
syntax is case sensitive, and yes, you would add it to the end of the
BalancerMember

Filip

Alston, Brian (US SSA) wrote:
 Ok ... I feel like a moron but I cannot figure out how to use 
 disablereuse option. When I google for examples on disablereuse, what I 
 find is that in my httpd.conf file I need to add the line JkOptions 
 +DisableReuse. However, reading the information here 
 (http://httpd.apache.org/docs/2.2/mod/mod_proxy.html) it looks like I need to 
 add disablereuse=On  to the end of the line BalancerMember 
 http://192.168.1.101:8080 loadfactor=1. I am extremely new at this Tomcat 
 clustering process, so any leniency and help will be very much appreciated.

 Thanks

 Have a great day.

 
 From: Filip Hanik - Dev Lists [devli...@hanik.com]
 Sent: Tuesday, March 10, 2009 1:22 PM
 To: Tomcat Users List
 Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

 Alston, Brian (US SSA) wrote:

 Filip

 Thank you for your help. I made the changes like you suggested:

 changed stickysession-jsessionid to 
 stickysession=JSESSIONID|jsessionid
 I already had stickysession=jsessionid (it was a typo here in my 
 post) but I added the pipe and uppercase JSESSIONID

 my server.xml already had the line you suggested.

 If I use disablereuse=On won't I then have problems with my 
 cookies and sessions?


 disable reuse will not affect your cookies or sessions

 Filip

 Again, thank you very much for your help.

 
 From: Filip Hanik - Dev Lists [devli...@hanik.com]
 Sent: Tuesday, March 10, 2009 12:42 PM
 To: Tomcat Users List
 Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

 hi Brian,
 your stickysession attribute is wrong, it should look like

 |stickysession=JSESSIONID|jsessionid

 then you must set jvmRoute in server.xml (Engine name=xxx
 jvmRoute=tc1) the jvmRoute has to be unique across the tc nodes.
 stickyness will only apply to request that have sessions

 remove smax/max, better to use the defaults

 I would also set the property disablereuse to On if it is supported in
 your httpd version, right now it may try to use a connection that is
 dead, and it seems its not trying another node, there may be some other
 attributes that can help with that too

 documentation is here
 http://httpd.apache.org/docs/2.2/mod/mod_proxy.html

 Filip

 |Alston, Brian (US SSA) wrote:


 Like the example in the book, I created a file called 
 proxy-balancer.conf and put it in the conf.d directory. Here is what 
 the file looks like (I retyped it so there may be mistakes):

 IfModule !proxy_module
 LoadModule proxy_module modules/mod_proxy.so
 /IfModule

 # IfModule !proxy_ajp_module
 # LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
 # /IfModule

 IfModule !proxy_http_module
 LoadModule proxy_http_module modules/mod_proxy_http.so
 /IfModule

 IfModule !proxy_balancer_module
 LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
 /IfModule

 IfModule !status_module
 LoadModule status_module modules/mod_status.so
 /IfModule

 IfModule !proxy_balancer_module
 ProxyRequests Off

 Proxy balancer://tccluster
 BalancerMember http://192.168.1.101:8080 loadfactor=1 max=150 smax=145
 BalancerMember http://192.168.1.102:8080 loadfactor=1 max=150 smax=145
 BalancerMember http://192.168.1.103:8080 loadfactor=1 max=150 smax=145
 Order Deny,Allow
 Allow from all
 /Proxy

 Location /balancer-manager
 SetHandler balancer-manager
 Order Deny,Allow
 Allow from all
 /Location

 Location /my-webapp
 ProxyPass balancer://tccluster/my-webapp stickysession-jsessionid
 ProxyPassReverse balancer://tccluster/my-webapp
 Order Deny,Allow
 Allow from all
 /Location

 Location 

Re: Problems with LoadBalancing

[Rainer Jung]

On 11.03.2009 14:03, Toni Menendez Lopez wrote:

Hello everybody,
I have following architecture :
2 Server with Apache and Tomcat
Versions :
APACHE
-
httpd -v
Server version: Apache/2.0.52
Server built:   May 24 2006 11:45:06
TOMCAT
-
./version.sh
Using JRE_HOME:   /opt/jdk1.5.0_10
Server version: Apache Tomcat/5.5.20
Server built:   Sep 12 2006 10:09:20
Server number:  5.5.20.0
OS Name:Linux
OS Version: 2.6.9-55.0.2.ELsmp
Architecture:   i386
JVM Version:1.5.0_10-b03
JVM Vendor: Sun Microsystems Inc.


What's your mod_jk version?


I am doing load balancing between both with JK, with an scenario of 50
reques per session (aprox), and 500 reqxseg ( aprox ).


What is reqxseg?


The thing is the following, when I shutdown the passive server, I have a


What is a passive server? I thought you do load balancing?
What do you mean by shutdown?


download of my reqxseg, and the requests that where managed by the
passive server get stucked for long time, like 5 min.
New request afther shutting donw the passive server are well processed.
But the thing is if there is a way to reduce this time that requests are
stucked.


The answer depends on your answer to my above questions.


This is my worker :
# izonetv LoadBalancer Definition
worker.izonetv.balance_workers=izonetv-mifeas01_data,izonetv-mifeas02_data
worker.izonetv.method=Session
worker.izonetv.retries=1
worker.izonetv.sticky_session=True
#worker.izonetv.sticky_session_force=1
worker.izonetv.type=lb
# izonetv-mifeas01_data Node Definition
worker.izonetv-mifeas01_data.connect_timeout=1
worker.izonetv-mifeas01_data.fail_on_status=404


You don't want to fail on 404.


worker.izonetv-mifeas01_data.host=mifeas01_data
worker.izonetv-mifeas01_data.lbfactor=1
worker.izonetv-mifeas01_data.port=8009
worker.izonetv-mifeas01_data.reply_timeout=3
worker.izonetv-mifeas01_data.type=ajp13
# izonetv-mifeas02_data Node Definition
worker.izonetv-mifeas02_data.connect_timeout=1
worker.izonetv-mifeas02_data.fail_on_status=404


You don't want to fail on 404.


worker.izonetv-mifeas02_data.host=mifeas02_data
worker.izonetv-mifeas02_data.lbfactor=1
worker.izonetv-mifeas02_data.port=8009
worker.izonetv-mifeas02_data.reply_timeout=3
worker.izonetv-mifeas02_data.type=ajp13


Regards,

Rainer

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Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem

[Rainer Jung]

On 11.03.2009 16:28, Alston, Brian (US SSA) wrote:

Filip

 I was under the assumption, from my reading, that load balancing was a component 
of clustering. At least that's how the O'Reilly book makes me feel.

I added the option to the end of the line and it now looks like this:

 BalancerMember http://192.168.1.101:8080 loadfactor=1 disablereuse=On
 BalancerMember http://192.168.1.102:8080 loadfactor=1 disablereuse=On
 BalancerMember http://192.168.1.103:8080 loadfactor=1 disablereuse=On

I restarted Apache and got the following error:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Starting httpd: Syntax error on line 25 of 
/etc/httpd/conf.d/proxy-balancer.conf:
BalancerMember unknown Worker parameter
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


Attribute disablereuse has been added in httpd 2.2.9. When using 
mod_proxy_balancer or mod_proxy_ajp you should use the most recent 
version of httpd (at the moment 2.2.11), because those modules are still 
developing faster than most other, older modules.


Regards,

Rainer

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Re: Problems with LoadBalancing

[Toni Menendez Lopez]

2009/3/11 Rainer Jung rainer.j...@kippdata.de

 On 11.03.2009 14:03, Toni Menendez Lopez wrote:

 Hello everybody,
 I have following architecture :
 2 Server with Apache and Tomcat
 Versions :
 APACHE
 -
 httpd -v
 Server version: Apache/2.0.52
 Server built:   May 24 2006 11:45:06
 TOMCAT
 -
 ./version.sh
 Using JRE_HOME:   /opt/jdk1.5.0_10
 Server version: Apache Tomcat/5.5.20
 Server built:   Sep 12 2006 10:09:20
 Server number:  5.5.20.0
 OS Name:Linux
 OS Version: 2.6.9-55.0.2.ELsmp
 Architecture:   i386
 JVM Version:1.5.0_10-b03
 JVM Vendor: Sun Microsystems Inc.


 What's your mod_jk version?


--JK Version:mod_jk/1.2.23



 I am doing load balancing between both with JK, with an scenario of 50
 reques per session (aprox), and 500 reqxseg ( aprox ).


 What is reqxseg?


-- HTTP request per second.



 The thing is the following, when I shutdown the passive server, I have a


 What is a passive server? I thought you do load balancing?
 What do you mean by shutdown?


-- I have a red hat cluster in both servers which give to me an Virtual IP
for both servers, this virtual IP is of one of the servers and is the
entrace point for my architecture, so the requests are received only with
one apache, which delivers the request to the tomcats of both servers.

-- The passive servers in the one which does not have the IP, si the apache
of this servers is just not receiving requests.

-- Shutting down, is just swtch off the server ( just simulating a crash of
the server).

 download of my reqxseg, and the requests that where managed by the
 passive server get stucked for long time, like 5 min.
 New request afther shutting donw the passive server are well processed.
 But the thing is if there is a way to reduce this time that requests are
 stucked.


 The answer depends on your answer to my above questions.

 This is my worker :
 # izonetv LoadBalancer Definition
 worker.izonetv.balance_workers=izonetv-mifeas01_data,izonetv-mifeas02_data
 worker.izonetv.method=Session
 worker.izonetv.retries=1
 worker.izonetv.sticky_session=True
 #worker.izonetv.sticky_session_force=1
 worker.izonetv.type=lb
 # izonetv-mifeas01_data Node Definition
 worker.izonetv-mifeas01_data.connect_timeout=1
 worker.izonetv-mifeas01_data.fail_on_status=404


 You don't want to fail on 404.

-- Sorry what does mean this parameter ? I just copy from another
configuration.



 worker.izonetv-mifeas01_data.host=mifeas01_data
 worker.izonetv-mifeas01_data.lbfactor=1
 worker.izonetv-mifeas01_data.port=8009
 worker.izonetv-mifeas01_data.reply_timeout=3
 worker.izonetv-mifeas01_data.type=ajp13
 # izonetv-mifeas02_data Node Definition
 worker.izonetv-mifeas02_data.connect_timeout=1
 worker.izonetv-mifeas02_data.fail_on_status=404


 You don't want to fail on 404.

 worker.izonetv-mifeas02_data.host=mifeas02_data
 worker.izonetv-mifeas02_data.lbfactor=1
 worker.izonetv-mifeas02_data.port=8009
 worker.izonetv-mifeas02_data.reply_timeout=3
 worker.izonetv-mifeas02_data.type=ajp13


 Regards,

 Rainer

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Re: Tomcat for Dummies

[André Warnier]

Ken Bowen wrote:

Let's be frugal and use just 2 instances of a webapp.
How do you run 2 instances of a webapp?
You must deploy them.  How do you do that?
You drop a war file for each into webapps.

.. etc.. (sound of me being whacked ..)

Sorry, I expressed myself badly I guess.
I meant :
- there is only one webapp defined, say /mywebapp
- but there are currently 5 HTTP requests to /mywebapp being processed

My understanding is that there are thus 5 Threads currently running 
mywebapp.  That's what I was calling instances, and I apologise if 
that is the wrong terminology.
Now, one of these instances, for some reason of it's own, has just 
sent a request to the Manager webapp asking to be undeployed.


Now, how many of these ServletContextListener things are in existence, 
and how many are being called to say that something is going on ?


Does my question/remark/puzzlement make sense in that context ?

Remember I'm not really a Java guy, so my understanding of these things 
tends to be somewhat nebulous..


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RE: Not able to shutdown tomcat

[Aleksandr Elbakyan]

Thank you for help this link was really helpful 

--- On Tue, 3/10/09, Caldarale, Charles R chuck.caldar...@unisys.com wrote:

From: Caldarale, Charles R chuck.caldar...@unisys.com
Subject: RE: Not able to shutdown tomcat
To: Tomcat Users List users@tomcat.apache.org
Date: Tuesday, March 10, 2009, 6:02 PM

 From: Aleksandr Elbakyan [mailto:ramal...@yahoo.com] 
 Subject: Not able to shutdown tomcat
 
 So I need somehow shut down thread pool manually from 
 some other tomcat shutdown listener thread.

You need to implement a ServletContextListener that will terminate your threads 
when the associated webapp is being stopped.  See section 10 of the servlet 
spec:
http://jcp.org/aboutJava/communityprocess/mrel/jsr154/index2.html

 - Chuck


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RE: Tomcat for Dummies

[Peter Crowther]

 From: André Warnier [mailto:a...@ice-sa.com]
 Now, how many of these ServletContextListener things are in
 existence,

Exactly as many as you have defined in web.xml.  Probably one, as you probably 
wouldn't want to define more than that - I'm not even sure whether the spec 
allows it.

 and how many are being called to say that something is going on ?

Each listener you have defined will be called exactly once.

- Peter

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RE: Tomcat for Dummies

[Caldarale, Charles R]

 From: André Warnier [mailto:a...@ice-sa.com] 
 Subject: Re: Tomcat for Dummies
 
 Now, how many of these ServletContextListener things 
 are in existence, and how many are being called to say 
 that something is going on ?

Read the servlet spec (section 10).  The number in existence is the number you 
specify (usually just one, but there's no limit), and all that are specified 
will be called once each.  As Mark previously stated, the call(s) will be made 
after a reasonable waiting period to allow active requests to finish processing.

 - Chuck


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Tomcat 6 and Apache Derby

[Robert K. Vanderhoek]

I'm having some trouble getting Apache Derby embedded inside Tomcat 6 so I can 
access a database threw my webapp.  I am receiving the following error in the 
catalina.out log file: /Class Not Found: java.lang.ClassNotFoundException: 
jdbc:derby/.  This is generated in the log when the webapp is accessed.  I have 
set the classpath locally with derbys setEmbeddedCP command.  I am thinking I 
also have to specify the classpath in Tomcat too.  Is this done by modifying 
the server.xml globally or the web.xml for each webapp?  When I look online for 
help, most of what I'm finding says all you have to do is copy the derby.jar to 
$CATALINA_HOME/lib and tomcat will automatically load any jar files it finds, 
is that true?  Any help or feedback on this will be much appreciated, thank you.

Software running on server
- RHEL4u3
- Java6u7
- Tomcat6.0
- Derby 10.4.2.0

Directory structure
- /usr/apache-tomcat-6.0.18 (CATALINA_HOME)
- /usr/apache-tomcat-6.0.18/lib/derby.jar (copied in from DERBY_HOME/lib, 
figuring tomcat would automatically load it on startup for each webapp)
- /usr/java/jdk1.6.0_07 (JAVA_HOME)
- /usr/db-derby-10.4.2.0-bin (DERBY_HOME)

Robert

Re: Tomcat URL Rewrite. Help with configuration.

[Rodro]

Dear awarnier.
Ok, Now I found such WEB-INF directory (in my app it's 
C:\ibi\WebFOCUS76\webapps\webfocus76\WEB-INF), and followed the installation
and configuration steps.

1) copied urlrewrite.xml into such WEB-INF
2) edited web.xml with the below lines:
  filter
filter-nameUrlRewriteFilter/filter-name

filter-classorg.tuckey.web.filters.urlrewrite.UrlRewriteFilter/filter-class
  /filter
  filter-mapping
filter-nameUrlRewriteFilter/filter-name
url-pattern/*/url-pattern
  /filter-mapping
3) edited urlrewrite with my own rewriting config:
rule
from/car/from
to type=redirect/ibi_apps/WFServlet?IBIF_ex=carinst/to
/rule
4) copied urlrewrite-2.6.0.jar into WEB-INF/lib directory
5) restarted Tomcat

Though redirection didn't work, but furthermore when I try to see
http://localhost:8080/rewrite-status, I get the below error:

Estado HTTP 404 - /rewrite-status

type Informe de estado
mensaje /rewrite-status
descripción El recurso requerido (/rewrite-status) no está disponible.

Apache Tomcat/5.5.25

Already looked into urlrewrite.xml and such rule is there:
rule
note
The rule means that requests to /test/status/ will be redirected
to /rewrite-status
the url will be rewritten.
/note
from/test/status//from
to type=redirect%{context-path}/rewrite-status/to
/rule


WHAT AM I DOING WRONG???
APPRECIATTE YOUR HELP ON THIS.
Rodrigo.



awarnier wrote:
 
 Rodro wrote:
 Dear Tomcat Users.
 I'm trying to do a URL masking on Tomcat 5.5.25.
 
 What I specifically want to do is:
 I execute (call) an app with the following URL:   
 http://localhost:8080/ibi_apps/WFServlet?IBIF_ex=carinst
 Now, I need to mask the URL to get the same result calling the app as:   
 http://localhost:8080/car
 i.e. mask /ibi_apps/WFServlet?IBIF_ex=carinst  as /car.
 
 I found a Solution with URLREWRITE on 
 http://tuckey.org/urlrewrite/manual/2.6
 Under Install I see on STEP 1:“Download the zip (or tar.gz) and
 extract it into your context'sdirectory ie, so that urlrewrite.xml goes
 into
 the WEB-INF directory”. 
 
 However, looking into my file directory I found 6 WEB-INF directories:
 C:\Archivos de programa\Apache Software Foundation\Tomcat
 5.5\webapps\ROOT
 C:\Archivos de programa\Apache Software Foundation\Tomcat
 5.5\webapps\tomcat-docs
 C:\Archivos de programa\Apache Software Foundation\Tomcat
 5.5\server\webapps\admin
 C:\Archivos de programa\Apache Software Foundation\Tomcat
 5.5\server\webapps\host-manager
 C:\Archivos de programa\Apache Software Foundation\Tomcat
 5.5\server\webapps\manager
 C:\Archivos de programa\Apache Software Foundation\Tomcat
 5.5\webapps\tomcat-docs\appdev\sample\web 
 
 In which one should I extract the zip file into?
 Thanks and best regards.
 Rodrigo Allende.
 
 Rodrigo,
 somewhere above there, you mention your original URL
 http://localhost:8080/ibi_apps/WFServlet?IBIF_ex=carinst
 
 So, apart from all the webapp/* directories which you are mentioning 
 just above here, you must have a /ibi_apps/WEB-INF directory somewhere, no
 ?
 If you do, then that's the one in which you should unpack that zip.
 And if you don't, then there is something that you are not telling us..
 
 
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-- 
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http://www.nabble.com/Tomcat-URL-Rewrite.-Help-with-configuration.-tp22446210p22461196.html
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RE: Tomcat 6 and Apache Derby

[Caldarale, Charles R]

 From: Robert K. Vanderhoek [mailto:rob...@nhdeeds.com] 
 Subject: Tomcat 6 and Apache Derby
 
 /Class Not Found: java.lang.ClassNotFoundException: 
 jdbc:derby/.  

Looks like either your code to create a DB connection is incorrect, or your 
Resource config is bad.

 I have set the classpath locally with derbys 
 setEmbeddedCP command.

A Bad Idea.

 I am thinking I also have to specify 
 the classpath in Tomcat too.

A Really Bad Idea.

Sounds like you need to read the documentation:
http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html

 - Chuck


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Re: Tomcat URL Rewrite. Help with configuration.

[Ben Hu]

Rodrigo,
What is the error message in English?

And i think this one is just an example config file coming with urlrewriter.
If you do not need it, you can just delete it.

 rule
   note
   The rule means that requests to /test/status/ will be redirected
to /rewrite-status
   the url will be rewritten.
   /note
   from/test/status//from
   to type=redirect%{context-path}/rewrite-status/to
   /rule


-Ben

On Wed, Mar 11, 2009 at 2:09 PM, Rodro rodrigo_alle...@ibi.com wrote:


 Dear awarnier.
 Ok, Now I found such WEB-INF directory (in my app it's
 C:\ibi\WebFOCUS76\webapps\webfocus76\WEB-INF), and followed the
 installation
 and configuration steps.

 1) copied urlrewrite.xml into such WEB-INF
 2) edited web.xml with the below lines:
  filter
filter-nameUrlRewriteFilter/filter-name


 filter-classorg.tuckey.web.filters.urlrewrite.UrlRewriteFilter/filter-class
  /filter
  filter-mapping
filter-nameUrlRewriteFilter/filter-name
url-pattern/*/url-pattern
  /filter-mapping
 3) edited urlrewrite with my own rewriting config:
rule
from/car/from
to type=redirect/ibi_apps/WFServlet?IBIF_ex=carinst/to
/rule
 4) copied urlrewrite-2.6.0.jar into WEB-INF/lib directory
 5) restarted Tomcat

 Though redirection didn't work, but furthermore when I try to see
 http://localhost:8080/rewrite-status, I get the below error:

 Estado HTTP 404 - /rewrite-status

 
 type Informe de estado
 mensaje /rewrite-status
 descripción El recurso requerido (/rewrite-status) no está disponible.

 
 Apache Tomcat/5.5.25

 Already looked into urlrewrite.xml and such rule is there:
rule
note
The rule means that requests to /test/status/ will be redirected
 to /rewrite-status
the url will be rewritten.
/note
from/test/status//from
to type=redirect%{context-path}/rewrite-status/to
/rule


 WHAT AM I DOING WRONG???
 APPRECIATTE YOUR HELP ON THIS.
 Rodrigo.



 awarnier wrote:
 
  Rodro wrote:
  Dear Tomcat Users.
  I'm trying to do a URL masking on Tomcat 5.5.25.
 
  What I specifically want to do is:
  I execute (call) an app with the following URL:
  http://localhost:8080/ibi_apps/WFServlet?IBIF_ex=carinst
  Now, I need to mask the URL to get the same result calling the app as:
  http://localhost:8080/car
  i.e. mask /ibi_apps/WFServlet?IBIF_ex=carinst  as /car.
 
  I found a Solution with URLREWRITE on
  http://tuckey.org/urlrewrite/manual/2.6
  Under Install I see on STEP 1:“Download the zip (or tar.gz) and
  extract it into your context'sdirectory ie, so that urlrewrite.xml goes
  into
  the WEB-INF directory”.
 
  However, looking into my file directory I found 6 WEB-INF directories:
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\webapps\ROOT
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\webapps\tomcat-docs
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\server\webapps\admin
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\server\webapps\host-manager
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\server\webapps\manager
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\webapps\tomcat-docs\appdev\sample\web
 
  In which one should I extract the zip file into?
  Thanks and best regards.
  Rodrigo Allende.
 
  Rodrigo,
  somewhere above there, you mention your original URL
  http://localhost:8080/ibi_apps/WFServlet?IBIF_ex=carinst
 
  So, apart from all the webapp/* directories which you are mentioning
  just above here, you must have a /ibi_apps/WEB-INF directory somewhere,
 no
  ?
  If you do, then that's the one in which you should unpack that zip.
  And if you don't, then there is something that you are not telling us..
 
 
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RE: Tomcat URL Rewrite. Help with configuration.

[Caldarale, Charles R]

 From: Rodro [mailto:rodrigo_alle...@ibi.com] 
 Subject: Re: Tomcat URL Rewrite. Help with configuration.
 
 Though redirection didn't work, but furthermore when I try to see
 http://localhost:8080/rewrite-status, I get the below error:
 Estado HTTP 404 - /rewrite-status

That would be expected, since you don't appear to have a webapp named 
rewrite-status.

You likely do not have your webapp deployed properly.  If you want your webapp 
to be the default one, it must be named ROOT (case sensitive, even on Windows). 
 Post your server.xml and the META-INF/context.xml file from your webapp (if it 
exists).

 - Chuck


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Re: Tomcat URL Rewrite. Help with configuration.

[Rodro]

According to the documentation, such context should give you a wellcome
page to the urlrewriting service, but yes I don't need it indeed.

The error message in English is:

HTTP Status 404 - /rewrite-status

type Status report
message /rewrite-status
description The requested resource (/rewrite-status) is not available.

Apache Tomcat/5.5.25


Ben Hu wrote:
 
 Rodrigo,
 What is the error message in English?
 
 And i think this one is just an example config file coming with
 urlrewriter.
 If you do not need it, you can just delete it.
 
  rule
note
The rule means that requests to /test/status/ will be
 redirected
 to /rewrite-status
the url will be rewritten.
/note
from/test/status//from
to type=redirect%{context-path}/rewrite-status/to
/rule
 
 
 -Ben
 
 On Wed, Mar 11, 2009 at 2:09 PM, Rodro rodrigo_alle...@ibi.com wrote:
 

 Dear awarnier.
 Ok, Now I found such WEB-INF directory (in my app it's
 C:\ibi\WebFOCUS76\webapps\webfocus76\WEB-INF), and followed the
 installation
 and configuration steps.

 1) copied urlrewrite.xml into such WEB-INF
 2) edited web.xml with the below lines:
  filter
filter-nameUrlRewriteFilter/filter-name


 filter-classorg.tuckey.web.filters.urlrewrite.UrlRewriteFilter/filter-class
  /filter
  filter-mapping
filter-nameUrlRewriteFilter/filter-name
url-pattern/*/url-pattern
  /filter-mapping
 3) edited urlrewrite with my own rewriting config:
rule
from/car/from
to type=redirect/ibi_apps/WFServlet?IBIF_ex=carinst/to
/rule
 4) copied urlrewrite-2.6.0.jar into WEB-INF/lib directory
 5) restarted Tomcat

 Though redirection didn't work, but furthermore when I try to see
 http://localhost:8080/rewrite-status, I get the below error:

 Estado HTTP 404 - /rewrite-status

 
 type Informe de estado
 mensaje /rewrite-status
 descripción El recurso requerido (/rewrite-status) no está disponible.

 
 Apache Tomcat/5.5.25

 Already looked into urlrewrite.xml and such rule is there:
rule
note
The rule means that requests to /test/status/ will be
 redirected
 to /rewrite-status
the url will be rewritten.
/note
from/test/status//from
to type=redirect%{context-path}/rewrite-status/to
/rule


 WHAT AM I DOING WRONG???
 APPRECIATTE YOUR HELP ON THIS.
 Rodrigo.



 awarnier wrote:
 
  Rodro wrote:
  Dear Tomcat Users.
  I'm trying to do a URL masking on Tomcat 5.5.25.
 
  What I specifically want to do is:
  I execute (call) an app with the following URL:
  http://localhost:8080/ibi_apps/WFServlet?IBIF_ex=carinst
  Now, I need to mask the URL to get the same result calling the app as:
  http://localhost:8080/car
  i.e. mask /ibi_apps/WFServlet?IBIF_ex=carinst  as /car.
 
  I found a Solution with URLREWRITE on
  http://tuckey.org/urlrewrite/manual/2.6
  Under Install I see on STEP 1:“Download the zip (or tar.gz) and
  extract it into your context'sdirectory ie, so that urlrewrite.xml
 goes
  into
  the WEB-INF directory”.
 
  However, looking into my file directory I found 6 WEB-INF directories:
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\webapps\ROOT
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\webapps\tomcat-docs
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\server\webapps\admin
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\server\webapps\host-manager
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\server\webapps\manager
  C:\Archivos de programa\Apache Software Foundation\Tomcat
  5.5\webapps\tomcat-docs\appdev\sample\web
 
  In which one should I extract the zip file into?
  Thanks and best regards.
  Rodrigo Allende.
 
  Rodrigo,
  somewhere above there, you mention your original URL
  http://localhost:8080/ibi_apps/WFServlet?IBIF_ex=carinst
 
  So, apart from all the webapp/* directories which you are mentioning
  just above here, you must have a /ibi_apps/WEB-INF directory somewhere,
 no
  ?
  If you do, then that's the one in which you should unpack that zip.
  And if you don't, then there is something that you are not telling us..
 
 
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  For additional commands, e-mail: users-h...@tomcat.apache.org
 
 
 

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Re: Apache/mod_jk serves random files from tomcat

[LukeK]

Rainer Jung-3 wrote:
 
 did you find out in the meantime, whether you were using the tcnative (aka
 APR) connector?
 

I was certainly using libtcnative, and removed it at the start of the month.
I haven't seen enough to definitively say that it solved the problem, but my
experience thus far is certainly consistent with such a hypothesis.

Cheers!

Luke
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Re: Tuning worker MPM

[kulbir Saini]

hmm, np..

thanks


On Tue, Mar 10, 2009 at 10:17 PM, Caldarale, Charles R 
chuck.caldar...@unisys.com wrote:

  From: kulbir Saini [mailto:kulbir.sai...@gmail.com]
  Subject: Re: Tuning worker MPM
 
  Firstly, let me convey my sorry been using this e-mail
  thread, i tried to put on httpd list but i think thread
  is breaking there.

 Apology not accepted.  Please do not post httpd-specific questions to the
 Tomcat list.

  - Chuck


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RE: className [mx4j.adaptor.http.HttpAdaptor] does not exist

[Stanley Wong]

That is how I do.

1. startup.sh: adding the modification of CATALINA_OPTS

CATALINA_OPTS=-Dcom.sun.management.jmxremote 
-Dcom.sun.management.jmxremote.port=6969 
-Dcom.sun.management.jmxremote.ssl=false 
-Dcom.sun.management.jmxremote.authenticate=false

2. server.xml: adding the modification of Connector port=8009 ...

Connector port=8009 handler.list=mx mx.enabled=true 
mx.httpHost=myhost.com mx.httpPort=6969 protocol=AJP/1.3/

Without adding the tomcat compat library (jmx.jar) and mx4j-tools.jar, I
have the problem-loading page. 

Adding the libraries to the common/lib also gives the problem-loading
page. 

Adding the libraries to the lib:
- Accessing to http://myhost.com:6969 with the local browser gives the
MX4J-Agent View (JMX Management console), but access to the ip address
of myhost.com like http://10.10.10.10:6969 gives the problem-loading
page.

However, even in the case of having the MX4J-Agent View, a remote
machine running jConsole is unable to connect to the agent. 

I am expecting to see a blank page when I access http://myhost.com:6969,
and I am able to connect to the agent with jConsole. 

Here is what I see from the log file:

Mar 11, 2009 3:28:57 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Mar 11, 2009 3:28:57 PM org.apache.jk.common.JkMX classExists
INFO: className [mx4j.adaptor.http.HttpAdaptor] does not exist
Mar 11, 2009 3:28:57 PM org.apache.jk.common.JkMX loadAdapter
INFO: Started MX4J console on host myhost.com at port 6969
HttpAdaptor version 3.0.2 started on port 6969
log4j:WARN No appenders could be found for logger
(org.apache.log4j.jmx.HierarchyDynamicMBean).
log4j:WARN Please initialize the log4j system properly.
Mar 11, 2009 3:28:57 PM org.apache.jk.common.JkMX init
INFO: Registering the JMX hierarchy for Log4J
Mar 11, 2009 3:28:57 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Mar 11, 2009 3:28:57 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/167  config=null
Mar 11, 2009 3:28:57 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1520 ms

What could be wrong?

Stanley 






-Original Message-
From: Kees Jan Koster [mailto:kjkos...@gmail.com] 
Sent: Tuesday, March 10, 2009 3:51 PM
To: Tomcat Users List
Subject: Re: className [mx4j.adaptor.http.HttpAdaptor] does not exist

Dear Stanley,

 I try to setup the JMX in Tomcat 6.0.

Here is a discussion on how to enable JConsole and JMX for various  
application servers. http://java-monitor.com/forum/showthread.php?t=1

 I downloaded the latest version of mx4j and placed in the tomcat/lib
 folder.

Java 5 and 6 already have JMX built in, so there is no need for  
installing any JMX libraries.

 I encounter the error of [mx4j.adaptor.http.HttpAdaptor] does not
 exist.

 I went through the jar files of mx4j. I did see
 mx4j.tools.adaptor.http.HttpAdaptor, but not
 mx4j.adaptor.http.HttpAdaptor.


Could you elaborate what you want to see with JMX?

--
Kees Jan

http://java-monitor.com/forum/
kjkos...@kjkoster.org
06-51838192

The secret of success lies in the stability of the goal. -- Benjamin  
Disraeli


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Re: Tomcat for Dummies

[Ken Bowen]

.. etc.. (sound of me being whacked ..)

no, nono domestic violence here :-)
It's often hard enough to understand face to face, much less across  
5000+ miles.
I think the following is a fair description Chuck  others should  
nail me if it's not.


A webapp can be made up of one or more servlets, some of them  
explicitly defined (in web.xml) and some implicit, such as the  
servlets generated from jsp pages.  At it's simplest, for each fresh  
incoming request to the webapp, Tomcat determines the correct  
corresponding servlet in the webapp, and then causes a (new or  
recycled) thread to begin running that servlet with the incoming  
request data (doGet or doPost, etc.).
Since multiple independent users might issue near simultaneous  
requests, we can see that there might be numerous threads running for  
the webapp, all started by Tomcat.  (Also, each thread could easily  
generate other child threads to run, so the park can get quite full of  
picnickers.)


As Chuck pointed out,  each webapp can have zero or more  
ServletContextListeners defined for it.  These are specified in the  
app's web.xml like this (for example):


listener
listener-classcom.myapp.listener.MyAppListener/listener-class
 /listener

Then inside MyAppListener.java, one must have definitions of the  
following two Java methods:


public void contextInitialized(ServletContextEvent  
servletContextEvent)  {}
public void contextDestroyed(ServletContextEvent servletContextEvent)  
{...}


The bodies of these methods can contain any (Java) code you like.   
Tomcat guarantees that it will invoke contextInitialized as soon as  
possible as it sets up the machinery for your webapp (either when  
Tomcat itself has just started up) or when you have freshly deployed  
or started the webapp. And Tomcat guarantees that as soon as possible  
after learning that it must shut down the webapp, it will invoke
contextDestroyed.


There's no restriction on the number of such listeners which can be  
specified for a webapp; you could have MyAppListener1, MyAppListener2,  
etc.
Let's be frugal again and assume that there is just one listener  
(MyAppListener).  Then the contextInitialized  method will be invoked  
once when the webapp is started, and the contextDestroyed  method will  
be invoked only once when Tomcat needs to shut the webapp down.
As Mark pointed out,  after Tomcat is told (say by the Manager) to  
shutdown the webapp, Tomcat waits a certain interval (maybe 10  
seconds) for currently running threads for the webapp to complete  
processing.  But after that interval, it invokes  contextDestroyed / 
just once/ no matter how many threads are still running for the  
webapp.  Presumably, if the webapp expects there to be such long- 
running (possibly independent) threads still alive, the job (among  
others?)  of  contextDestroyed would be to bring those threads to a  
graceful halt.


I believe (but do not know -- Chuck, Mark??) that Tomcat essentially  
creates a (new or recycled) thread in which to run  contextDestroyed .


Cheers,
Ken

On Mar 11, 2009, at 1:13 PM, André Warnier wrote:


Ken Bowen wrote:

Let's be frugal and use just 2 instances of a webapp.
How do you run 2 instances of a webapp?
You must deploy them.  How do you do that?
You drop a war file for each into webapps.

.. etc.. (sound of me being whacked ..)

Sorry, I expressed myself badly I guess.
I meant :
- there is only one webapp defined, say /mywebapp
- but there are currently 5 HTTP requests to /mywebapp being  
processed


My understanding is that there are thus 5 Threads currently running  
mywebapp.  That's what I was calling instances, and I apologise  
if that is the wrong terminology.
Now, one of these instances, for some reason of it's own, has just  
sent a request to the Manager webapp asking to be undeployed.


Now, how many of these ServletContextListener things are in  
existence, and how many are being called to say that something is  
going on ?


Does my question/remark/puzzlement make sense in that context ?

Remember I'm not really a Java guy, so my understanding of these  
things tends to be somewhat nebulous..


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RE: Tomcat for Dummies

[Caldarale, Charles R]

 From: Ken Bowen [mailto:kbo...@als.com] 
 Subject: Re: Tomcat for Dummies
 
 Also, each thread could easily generate other 
 child threads to run

Only if the webapp chooses to do so; that's not something Tomcat does.

 But after that interval, it invokes contextDestroyed
 /just once/ 

That's once for each registered listener.

 I believe (but do not know -- Chuck, Mark??) that Tomcat 
 essentially creates a (new or recycled) thread in which 
 to run contextDestroyed.

I think so, but I'll have to dig around to make sure.

 - Chuck


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Re: tomcat w/apr data lost in http post request?

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Oliver,

On 3/10/2009 2:41 PM, Oliver Schoett wrote:
 As far as I know, splitting header and body of POST requests into
 separate TCP packets is a peculiarity of IE browsers.  This observation
 was made using normal HTML forms, but it may well apply to AJAX POST
 requests as well.

Can MSIE even control which data goes in which packet? That would seem
to be part of the TCP/IP stack, buried in the OS, and affecting both
MSIE and any other browser on the same system.

- -chris
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Re: Https forwarding problem

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hisham,

On 3/11/2009 5:52 AM, Hisham wrote:
 My concern is that because i have this security-constraint which makes any
 url pattern CONFIDENTIAL, that it's causing the web service call to be
 redirected as well.  And its very frustrating why the following config is
 NOT working (where i specify that urls starting with axis2 should be
 ignored), and ws calls STILL get redirected:
 
 security-constraint
 web-resource-collection
 url-pattern/axis2/*/url-pattern
 url-pattern/axis2/rest/*/url-pattern
 /web-resource-collection
 user-data-constraint
 transport-guaranteeNONE/transport-guarantee

That's odd. How do you know it's being redirected? Are you using a
packet capture utility? I would definitely use one of you aren't already.

Are you sure the web.xml that is deployed is the one you are editing?
Sounds like a stupid question, but sometimes one forgets to actually do
a redeploy after a change is made.

- -chris
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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rainer,

On 3/10/2009 12:19 PM, Rainer Jung wrote:
 1) There is no standard http header named REMOTE_ADDR. Not even within
 Tomcat. So whatever you get out of this header depends completely on
 whoever set it for you. It might not exist or contain garbage.

Sure there is. It's been there forever:

http://hoohoo.ncsa.uiuc.edu/cgi/env.html
http://www.ietf.org/rfc/rfc3875

 2) getRemoteAddr() gives you the address of the system, which opened the
 connection. In case of an AJP connector, this is not true, because AJP
 is meant to be used for reverse proxies. So here you get the address of
 the system which opened the connection to the web server, forwarded via
 AJP to Tomcat.

[snip]

 4) Usually Reverse Proxies set a non-standard header X-Forwarded-For.
 E.g. mod_proxy does. Be warned though, that cascading Reverse Proxies
 will most likely add to the header, so it can contain multiple
 addresses, usually comma-separated.

Does mod_jk set any of these headers?

X-Forwarded-For
X-Forwarded-Host
X-Forwarded-Server

Thanks,
- -chris
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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

All,

On 3/11/2009 4:51 PM, Christopher Schultz wrote:
 Rainer,
 
 On 3/10/2009 12:19 PM, Rainer Jung wrote:
 1) There is no standard http header named REMOTE_ADDR. Not even within
 Tomcat. So whatever you get out of this header depends completely on
 whoever set it for you. It might not exist or contain garbage.
 
 Sure there is. It's been there forever:
 
 http://hoohoo.ncsa.uiuc.edu/cgi/env.html
 http://www.ietf.org/rfc/rfc3875

Sorry about that; I was thinking CGI /environment variables/, not /HTTP
headers/.

Given the difference, I would say that these two calls are /rarely/
guaranteed to return the same value:

request.getRemoteAddr()
request.getHeader(REMOTE_ADDR)

...because, as Rainer points out, there is no standard REMOTE_ADDR header.

Sorry for polluting the list.

- -chris
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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Rainer Jung]

On 11.03.2009 21:51, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

2) getRemoteAddr() gives you the address of the system, which opened the
connection. In case of an AJP connector, this is not true, because AJP
is meant to be used for reverse proxies. So here you get the address of
the system which opened the connection to the web server, forwarded via
AJP to Tomcat.


[snip]


4) Usually Reverse Proxies set a non-standard header X-Forwarded-For.
E.g. mod_proxy does. Be warned though, that cascading Reverse Proxies
will most likely add to the header, so it can contain multiple
addresses, usually comma-separated.


Does mod_jk set any of these headers?

X-Forwarded-For
X-Forwarded-Host
X-Forwarded-Server


No, because it tries to act transparent by default, so it passes the 
original client/server situation to Tomcat and Tomcat patches it's 
client and server data inside the AJP connector in order to present the 
webapp the situation like it was at the web server.


But you can use mod_headers to additionally set those headers, if you 
like to, and mod_jk will forward them.


As described on the new shiny proxy documentation page

http://tomcat.apache.org/dev/dist/tomcat-connectors/jk/docs/jk-1.2.28-dev/generic_howto/proxy.html

those headers in a mod_jk setting relate to:

X-Forwarded-For: getRemoteAddr()
X-Forwarded-Host: getServerName()
X-Forwarded-Server: getLocalName()

at least when there is only one reverse proxy involved, so no 
concatenation of data in X-Forwarded-*.


Regards,

Rainer

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RE: tomcat w/apr data lost in http post request?

[Caldarale, Charles R]

 From: Christopher Schultz [mailto:ch...@christopherschultz.net] 
 Subject: Re: tomcat w/apr data lost in http post request?
 
 Can MSIE even control which data goes in which packet?

TCP/IP APIs on most platforms allow the Nagle algorithm to be disabled, which 
will cause data to be sent out on each call.  Most TCP/IP stacks also set the 
push flag on the last packet of a sequence to force the peer stack to deliver 
the data to the receiver without delay.  Tthat's probably all that IE is doing 
(but I don't know the MS APIs).

 - Chuck


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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Christopher Schultz]

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Rainer,

On 3/11/2009 5:06 PM, Rainer Jung wrote:
 No, because [mod_jk] tries to act transparent by default, so it passes the
 original client/server situation to Tomcat and Tomcat patches it's
 client and server data inside the AJP connector in order to present the
 webapp the situation like it was at the web server.

So, the REMOTE_ADDR environment variable is passed-through as... what?

If mod_jk tries to appear invisible, then the value of the REMOTE_ADDR
environment variable should be that of the original client (or, at
least, the original client as far as httpd is concerned).

Your previous message seems to say that mod_jk will provide the IP
address of the server running httpd as the REMOTE_ADDR when seen by Tomcat.

So, which is it?

Thanks,
- -chris
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Re: Apache/mod_jk serves random files from tomcat

[Rainer Jung]

On 11.03.2009 20:19, LukeK wrote:


Rainer Jung-3 wrote:

did you find out in the meantime, whether you were using the tcnative (aka
APR) connector?



I was certainly using libtcnative, and removed it at the start of the month.
I haven't seen enough to definitively say that it solved the problem, but my
experience thus far is certainly consistent with such a hypothesis.


Thanks very much for the feedback. Considering the severity of the 
problem, if you could give us another update at a time you think is 
appropriate (depending on how often the problem happened before).


Would you please be so kind to also tell us, which tcnative version you 
were using?


Thanks again,

Rainer

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Re: java.lang.NullPointerException loading resource from classpath

[Christopher Schultz]

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Tim,

On 3/7/2009 9:53 PM, Timothy Washington wrote:
 'MyClass.class.getResourceAsStream(myresource.xml)'

You might have better luck using ServletContext.getResourceAsStream, if
you have access to the ServletContext.

Check out the javadoc for this method for more information.

- -chris

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Re: download a file inside WEB-INF use its URL on server

[Christopher Schultz]

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Pierre,

On 3/8/2009 1:05 PM, Pierre Goupil wrote:
 Unfortunately it won't work as you will be unable to provide a valid URL for
 anything inside WEB-INF. But maybe you can tell us why point 2 (use a
 resource stream) doesn't suit you so that we can explore this way or another?

One way to get a valid URL for something inside WEB-INF is to do this:

ServletContext application = ...;
URL resource = application.getResource(/WEB-INF/xsds/my.xsd);

Then you can use the URL to fetch the content or whatever else you want
to do.

Of course, you have to have access to the ServletContext.

Hmm... this question seems a lot like another one I saw today...

- -chris
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Re: Resource with custom factory

[Christopher Schultz]

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Derek,

On 3/8/2009 4:31 PM, Derek Potts wrote:
 JPA allows you to create and configure an EntityManagerFactory, then
 store it in a Java Naming and Directory Interface (JNDI) tree for
 later retrieval and use.

 I would like to do something like this:
 Context initCtx = new InitialContext();
 Context envCtx = (Context) initCtx.lookup(java:comp/env);
 EntityManagerFactory emf = (EntityManagerFactory) envCtx.lookup(emf);

Sounds reasonable.

 I started off by reading
 http://tomcat.apache.org/tomcat-5.5-doc/jndi-resources-howto.html.

That's a good place to start. Pay special attention to this section:
http://tomcat.apache.org/tomcat-5.5-doc/jndi-resources-howto.html#Adding%20Custom%20Resource%20Factories

 Unfortunately, I still receive the same NamingException, thrown by
 ResourceEnvFactory. I was hoping to at least get an exception from my
 custom factory. The fact that tomcat is still calling the
 ResourceEnvFactory is why I thought that my question is for the Tomcat
 mailing list and not the OpenJPA list.

Yeah, this is almost definintely a Tomcat question, not an OpenJPA
question (unless you want to ask if someone has ever done what you are
trying to do using Tomcat over on the other list... it couldn't hurt).

 EMFFactory is a class I wrote that implements
 javax.naming.spi.ObjectFactory, which is then placed in my
 WEB-INF/classes path.

I think here's where you made your mistake. I would have expected Tomcat
to give you a NoClassDefFoundError or something similar because,
according to the documentation, your class should go here:


When you are through, place the factory class (and the corresponding
bean class) unpacked under $CATALINA_HOME/common/classes, or in a JAR
file inside $CATALINA_HOME/common/lib. In this way, the required class
files are visible to both Catalina internal resources and your web
application.


Try moving your factory to Tomcat's common/lib directory to see if that
helps.

- -chris
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Re: [OT] Re: Default Tomcat Page w/o Redirect

[Christopher Schultz]

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Ken,

On 3/9/2009 4:03 PM, Ken Bowen wrote:
 I agree with everything in both posts, but I just don't see what the
 /location/ of the jsp files (inside/outside WEB-INF) has to do with it.

It's just an access thing, really: no remote client can request that a
JSP be run without it's handling servlet running first. Just because you
shouldn't poke a fire doesn't mean you won't.

It's not about revealing code (which is another matter altogether), it's
about controlling access to the execution of your JSPs. If your JSPs are
within WEB-INF, no client can access them directly for any reason. That
forces the developers to code their application in such a way as to
support that setup.

- -chris

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Re: [OT] Re: Default Tomcat Page w/o Redirect

[Christopher Schultz]

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Gregor,

On 3/9/2009 3:58 PM, Gregor Schneider wrote:
 On Mon, Mar 9, 2009 at 8:23 PM, Len Popp len.p...@gmail.com wrote:
 What I mean is, clients *never* access a .jsp file by URL, e.g.
 http://www.example.com/app/foo.jsp;.
 
 This is definately wrong.

No, he's telling you about /his/ webapp, not making a general statement.
He puts his JSPs beneath WEB-INF so they cannot be accessed directly. In
his application, no JSP is ever accessed directly -- it must first go
through a servlet.

 I've googled for this issue, and what I find, is, that some frameworks
 recommend putting JSPs into WEB-INF/jsp.
 However, I also found the statement that not all Servlet-Containers
 are supporting it.

I can't believe a servlet container wouldn't support this. Perhaps you
are thinking it means more than it does.

- From SRV.12.2 of the servlet spec:


The security model applies to the static content part of the web
application and to servlets and filters within the application that are
requested by the client. The security model does not apply when a
servlet uses the RequestDispatcher to invoke a static resource or
servlet using a forward or an include.


so, if you use a RequestDispatcher to forward to or include another
resource, that resource is allowed to break the normal rules for client
access. For instance, you can forward to (or include) files under WEB-INF.

 Now I'm wondering (Mr. Servlet-Spec Chuck, you comment on that one):

Aw you can read the spec just as well as Chuck can!

 Is this directory-structure really part of the specs?

It is not prohibited by the spec, so there's no reason why it should be
prohibited by a (compliant) servlet container.

 How does Tomcat find a JSP within WEB-INF/jsp? Do I have to specify it
 in the deployment-descriptor?

There's no magic, here: when you request a RequestDispatcher, you
specify the path to the resource you want to target. If you put
/WEB-INF at the beginning of the path, you are targeting something
beneath the WEB-INF directory.

Tomcat will never respond to a client request for a JSP (like /foo.jsp)
by looking under WEB-INF for foo.jsp and executing it. It /must/ go
through a controller servlet specifically designed to do this type of thing.

- -chris
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Re: Too many threads

[Alexey Vlasov]

Hi Christopher.

On Tue, Mar 10, 2009 at 11:04:43AM -0400, Christopher Schultz wrote:
  I
  would like to know if they are useful and if not how to lessen their
  number.
 
 You should do a thread dump (send a SIG 3
 to your process and watch stdout)

Thank you, that has made much clearer.

 JVM-created threads (you can't eliminate these):
 
 main - runs the main program
 Reference Handler   - GC thread
 Finalizer   - GC thread
 Low Memory Detector - GC thread
 CompilerThread0 - JIT thread
 Signal Dispatcher   - Handles signals
 
 Tomcat-created threads:
 ContainerBackgroundProcessor[StandardEngine[Catalina]]
 TP-Monitor  - monitors the request handler thread pool
 TP-Processor[n] - these are the request handlers.
 You have configured your TC instance to have between
 2 and 10 of them. I wouldn't be surprised to find
 that you have 5 TP-Processor threads. I have 12.

 My thread dump contained 5 JVM threads + 14 Tomcat threads + 1 MySQL
 thread = 20 threads. You have 27, and you didn't tell us a thing about
 what your application does.

Default Tomcat home page and Server-status/Tomcat Manager
applications :)

  Connector address=123.123.123.123 port=50002 protocol=HTTP/1.1
  connectionTimeout=2 maxThreads=10 minSpareThreads=2 
  maxSpareThreads=5 /
 
 This is the only information you gave us that could help determine what
 those threads are. If you take a thread dump and re-post, we might be
 able to help.

Full thread dump Java HotSpot(TM) 64-Bit Server VM (10.0-b22 mixed mode):

http-123.123.123.123-50002-Acceptor-0 daemon prio=10 tid=0x2aaac4a5e000 
nid=0x348b runnable [0x4143c000..0x00
004143cd90]
   java.lang.Thread.State: RUNNABLE
   ...
[full dump in attach]

$ grep -c tid catalina.out
19

According to the written above everything is clear in the dump.
Thank you so much for your help.

But i've got one question left, can I set idle timeout for
the thread TP-Processor, after which they will die?

-- 
BRGDS. Alexey Vlasov.
Full thread dump Java HotSpot(TM) 64-Bit Server VM (10.0-b22 mixed mode):

http-123.123.123.123-50002-Acceptor-0 daemon prio=10 tid=0x2aaac4a5e000 
nid=0x348b runnable [0x4143c000..0x00
004143cd90]
   java.lang.Thread.State: RUNNABLE
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
- locked 0x2aaac0a902e8 (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:453)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at 
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(Unknown 
Source)
at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)

ContainerBackgroundProcessor[StandardEngine[Catalina]] daemon prio=10 
tid=0x2aaac4a5d800 nid=0x348a waiting on condition 
[0x4133b000..0x4133bd10]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(Unknown 
Source)
at java.lang.Thread.run(Thread.java:619)

Low Memory Detector daemon prio=10 tid=0x2aaac8023400 nid=0x3455 runnable 
[0x..0x]
   java.lang.Thread.State: RUNNABLE
CompilerThread1 daemon prio=10 tid=0x2aaac8020800 nid=0x3454 waiting on 
condition [0x..0x410373e0]
   java.lang.Thread.State: RUNNABLE
CompilerThread0 daemon prio=10 tid=0x2aaac801f000 nid=0x3453 waiting on 
condition [0x..0x40f36360]
   java.lang.Thread.State: RUNNABLE
Signal Dispatcher daemon prio=10 tid=0x2aaac801dc00 nid=0x3452 waiting on 
condition [0x..0x]
   java.lang.Thread.State: RUNNABLE
Finalizer daemon prio=10 tid=0x2aaac42bac00 nid=0x344d in Object.wait() 
[0x40d35000..0x40d35c10]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on 0x2aaac08e0be0 (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
- locked 0x2aaac08e0be0 (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
Reference Handler daemon prio=10 tid=0x2aaac42b9800 nid=0x344c in 
Object.wait() [0x40c34000..0x40c34d90]
   java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on 0x2aaac08e01b0 (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:485)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
- locked 0x2aaac08e01b0 (a 

Re: Tomcat URL masking question...

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
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Rodro,

On 3/10/2009 7:54 PM, Rodro wrote:
 Dear Chuck.
 I tried to implement #2 as you suggested, using urlrewrite as in
 http://tuckey.org/urlrewrite/manual/2.6
 Under Install I see on STEP 1:“Download the zip (or tar.gz) and
 extract it into your context'sdirectory ie, so that urlrewrite.xml goes into
 the WEB-INF directory”. 
 
 However, looking into my file directory I found 6 WEB-INF directories:
 C:\Archivos de programa\Apache Software Foundation\Tomcat 5.5\webapps
   ROOT
   tomcat-docs
   admin
   host-manager
   manager

 In which one should I extract the zip file into?

You don't seem to have your own application deployed. Where do you have
your own application deployed? From your previous post, it would seem
that it should be under webapps/ibi_apps, but it's not shown here.

You have two options for deployment of the urlrewrite library:

1. Under the ROOT webapp. Here, you'd map URLs of the form:

   /car(.*)?   -/ibi_apps\1


2. Under a new webapp deployed to /car. Here, you'd use:

   (.*)?  - /ibi_apps\1

So it depends on how you choose to do your deployment. Did you want to
just make short URLs available to users, or do you actually want all
your URLs to look like /car and not change to anything else in the URL
bar of the client's browser?

- -chris
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Re: Too many threads

[Christopher Schultz]

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Alexey,

On 3/11/2009 6:16 PM, Alexey Vlasov wrote:
 On Tue, Mar 10, 2009 at 11:04:43AM -0400, Christopher Schultz wrote:
 My thread dump contained 5 JVM threads + 14 Tomcat threads + 1 MySQL
 thread = 20 threads. You have 27, and you didn't tell us a thing about
 what your application does.
 
 Default Tomcat home page and Server-status/Tomcat Manager
 applications :)

Gotcha.

 Connector address=123.123.123.123 port=50002 protocol=HTTP/1.1
 connectionTimeout=2 maxThreads=10 minSpareThreads=2 
 maxSpareThreads=5 /

 This is the only information you gave us that could help determine what
 those threads are. If you take a thread dump and re-post, we might be
 able to help.
 
 Full thread dump Java HotSpot(TM) 64-Bit Server VM (10.0-b22 mixed mode):
 
 http-123.123.123.123-50002-Acceptor-0 daemon prio=10 tid=0x2aaac4a5e000 
 nid=0x348b runnable [0x4143c000..0x00
 004143cd90]

It looks like the verbosity of Thread names have been increased from TC
5.5 to TC 6.0. I like this, because you can tell which Connector
created the thread.

 According to the written above everything is clear in the dump.
 Thank you so much for your help.

No problem. Often, newcomers to both Java and webapps in general can be
shocked to see how many threads are running. How many processors to you
have on this box? Looks like 8:

GC task thread#0 (ParallelGC)
GC task thread#1 (ParallelGC)
GC task thread#2 (ParallelGC)
GC task thread#3 (ParallelGC)
GC task thread#4 (ParallelGC)
GC task thread#5 (ParallelGC)
GC task thread#6 (ParallelGC)
GC task thread#7 (ParallelGC)

 But i've got one question left, can I set idle timeout for
 the thread TP-Processor, after which they will die?

I think you have to use an Executor for that. See
http://tomcat.apache.org/tomcat-6.0-doc/config/executor.html for
details. You should be able to use maxIdleTime to configure that. Just
remember to connect your Connector to your Executor by using the
executor attribute of the Connector, and remove all the
thread-configuration attributes from your Connector, too.

Good luck,
- -chris
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Re: Syntex error in http with 'Include conf/mod_jk.conf'

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
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Harcharan,

On 3/8/2009 11:57 PM, Harcharan Singh wrote:
 I got the 'syntex error' and 'file not find error' when i use the
 include directive for mod_jk in httpd.conf file.
 
 I have created 'mod_jk.conf' in the 'conf' directory of Apache installation.

Do you think it would have been a good idea to include the relevant
sections of httpd.conf and mod_jk.conf when asking about such a
configuration? I think it would definitely improve your chances of a
helpful response.

- -chris
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Re: Fwd: Cookie not being set

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
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Michael,

On 3/11/2009 7:37 AM, Andromeda Mobile wrote:
 jsp:include page=/AdMob.jsp/

[snip]


   Cookie c = new Cookie(admobuu, value);
   c.setMaxAge(60*60*24*365*20);
   c.setPath(/);
   if (cookieDomain != null) {
 if (cookieDomain.charAt(0) != '.') cookieDomain = . +
 cookieDomain;
 c.setDomain(cookieDomain);
   }
   response.addCookie(c);


I'm not sure how anal retentive Tomcat is about adhering to the servlet
spec (these days it's getting a little closer to implementing exactly
what the spec lays out), but this could be a problem:

- From SRV.8.3:


[The target servlet of the include method] cannot set headers or call
any method that affects the headers of the response, with the exception
of the HttpServletRequest.getSession() and
HttpServletRequest.getSession(boolean) methods. Any attempt to set the
headers must be ignored, and any call to HttpServletRequest.getSession()
or HttpServletRequest.getSession(boolean) that would require adding a
Cookie response header must throw an IllegalStateException if the
response has been committed.


So, that basically says that includes can't set cookies.

Peter and Andre' have good suggestions about response already
committed problems that you should check for in your log files. If
that's what happening, then the headers are being sent before your AdMob
include is being processed, and the headers actually /cannot/ be
modified, whatever Tomcat's adherence to the spec turns out to be.

Try using:

%...@include file=/AdMob.jsp %

%...@include does a text-inclusion into your JSP /before/ it is compiled.
The included text is therefore considered part of the main JSP and
there's no involvement of the RequestDispatcher. When you use
jsp:include, you are making a sub-request to another resource in the
webapp and are subject to the rules stated above.

Try switching include mechanisms and see if that helps.

Good luck,
- -chris
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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Rainer Jung]

On 11.03.2009 22:22, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rainer,

On 3/11/2009 5:06 PM, Rainer Jung wrote:

No, because [mod_jk] tries to act transparent by default, so it passes the
original client/server situation to Tomcat and Tomcat patches it's
client and server data inside the AJP connector in order to present the
webapp the situation like it was at the web server.


So, the REMOTE_ADDR environment variable is passed-through as... what?

If mod_jk tries to appear invisible, then the value of the REMOTE_ADDR
environment variable should be that of the original client (or, at
least, the original client as far as httpd is concerned).


See below.


Your previous message seems to say that mod_jk will provide the IP
address of the server running httpd as the REMOTE_ADDR when seen by Tomcat.


I can't read that out of my previous message. Could you please cite the 
statement where I wrote that.



So, which is it?


I was not talking about CGI environment variables. mod_jk will not pass 
any environment variables, because they don't exist.


If you use the CGI servlet of Tomcat, then Tomcat will set an 
environment variable REMOTE_ADDR to the value of request.getRemoteAddr().


And as I said getRemoteAddr() will be the address of the web server 
client, unless you played with configuration.


Caution: there is yet another possible set of data, namely request 
attributes. Those are neither headers nor CGI env vars. Just so that 
there is still another reason for confusion.


Regards,

Rainer

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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rainer,

On 3/11/2009 6:45 PM, Rainer Jung wrote:
 On 11.03.2009 22:22, Christopher Schultz wrote:
 Your previous message seems to say that mod_jk will provide the IP
 address of the server running httpd as the REMOTE_ADDR when seen by
 Tomcat.
 
 I can't read that out of my previous message. Could you please cite the
 statement where I wrote that.

Apologies. Re-reading your message it's clear you said that AJP would
deliver the address of the system which opened the connection to the
web server.

Thanks for clearing that (me) up.

- -chris
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Version: GnuPG v1.4.9 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkm4QJsACgkQ9CaO5/Lv0PA84gCgiGbkv59r5QaE2ByrnkPBm7Vt
M5QAoLuBKsAg0YFpdE1aASpiPnp5IPkd
=wTG1
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Re: request.getRemoteAddr() vs. request.getHeader(REMOTE_ADDR)

[Rainer Jung]

On 11.03.2009 23:52, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rainer,

On 3/11/2009 6:45 PM, Rainer Jung wrote:

On 11.03.2009 22:22, Christopher Schultz wrote:

Your previous message seems to say that mod_jk will provide the IP
address of the server running httpd as the REMOTE_ADDR when seen by
Tomcat.

I can't read that out of my previous message. Could you please cite the
statement where I wrote that.


Apologies. Re-reading your message it's clear you said that AJP would
deliver the address of the system which opened the connection to the
web server.

Thanks for clearing that (me) up.


No problem!

And any improvement suggestions for the docs page I advertised are welcome!

http://tomcat.apache.org/dev/dist/tomcat-connectors/jk/docs/jk-1.2.28-dev/generic_howto/proxy.html

Regards,

Rainer

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Problem starting Tomcat in Netbeans

[Carlos Botto]

Hi,

I'm having problems to start Tomcat in Netbeans. It was working for a 
long time until suddenly it  stopped. I added a new servlet to the 
web.xml file and after that it broke, even after I removed the new 
servlet didn't work again. I validated web.xml and got no errors, but 
when I validated context.xml I got the following: cvc-elt.1: Cannot find 
the declaration of element 'Context'. [2]


The context.xml first lines are:
?xml version=1.0 encoding=UTF-8?
Context crossContext=true debug=5 docBase=qualitau 
path=/qualitau reloadable=true
   Logger className=org.apache.catalina.logger.FileLogger 
prefix=localhost_my_log. suffix=.txt timestamp=true/



I'm using Bundled Tomcat 5.5.17 with NetBeans 5.5.1
The web.xml file is too big to post it here, but I can do it if needed.
Here is the error from the log:

Mar 11, 2009 3:54:58 PM org.apache.tomcat.util.digester.Digester endElement
SEVERE: End event threw exception
java.lang.reflect.InvocationTargetException
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

   at java.lang.reflect.Method.invoke(Method.java:597)
   at 
org.apache.tomcat.util.IntrospectionUtils.callMethod1(IntrospectionUtils.java:898)
   at 
org.apache.catalina.startup.SetNextNamingRule.end(SetNextNamingRule.java:97)

   at org.apache.tomcat.util.digester.Rule.end(Rule.java:228)
   at 
org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1057)
   at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1772)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2923)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:645)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:508)
   at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
   at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
   at 
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
   at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
   at 
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
   at 
org.apache.tomcat.util.digester.Digester.parse(Digester.java:1561)
   at 
org.apache.catalina.startup.ContextConfig.processContextConfig(ContextConfig.java:781)
   at 
org.apache.catalina.startup.ContextConfig.contextConfig(ContextConfig.java:721)
   at 
org.apache.catalina.startup.ContextConfig.init(ContextConfig.java:977)
   at 
org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:278)
   at 
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
   at 
org.apache.catalina.core.StandardContext.init(StandardContext.java:5130)
   at 
org.apache.catalina.core.StandardContext.start(StandardContext.java:3945)
   at 
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
   at 
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
   at 
org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
   at 
org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:608)
   at 
org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:535)
   at 
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470)
   at 
org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
   at 
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
   at 
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
   at 
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
   at 
org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
   at 
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
   at 
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
   at 
org.apache.catalina.core.StandardService.start(StandardService.java:450)
   at 
org.apache.catalina.core.StandardServer.start(StandardServer.java:709)

   at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at 

RE: Problem starting Tomcat in Netbeans

[Caldarale, Charles R]

 From: Carlos Botto [mailto:carl...@qualitau.com] 
 Subject: Problem starting Tomcat in Netbeans
 
 when I validated context.xml I got the following: cvc-elt.1: 
 Cannot find the declaration of element 'Context'. [2]

Since there is no DTD to validate against, that's not surprising.

 Context crossContext=true debug=5 docBase=qualitau 
 path=/qualitau reloadable=true
 Logger className=org.apache.catalina.logger.FileLogger 
 prefix=localhost_my_log. suffix=.txt timestamp=true/

Tomcat has supported a Logger element in quite some time, so that should come 
out.  Also, the path attribute is illegal when the Context element is in your 
webapp's META-INF/context.xml file (which is where it should be).

 Mar 11, 2009 3:54:58 PM org.apache.catalina.startup.ContextConfig 
 processContextConfig
 SEVERE: Parse error in default web.xml

Note that the above refers to the *default* web.xml, not the one in your 
webapp's WEB-INF directory.  What did you break in Tomcat's conf/web.xml file?

 Mar 11, 2009 3:54:58 PM org.apache.catalina.startup.ContextConfig 
 processContextConfig
 SEVERE: Occurred at line 18 column 20

That should give you a pretty good idea of where to look.

 - Chuck


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Re: Problem starting Tomcat in Netbeans

[Carlos Botto]

Chuck,

Thanks for your answer.

I generated the DTD and fixed the config.xml problem.

But the other problem is still there. I didn't touch conf/web.xml, but I 
checked it out anyway and didn't find a problem (should be at line 18 
column 20).


Here are the first 24 lines from conf/web.xml:

?xml version=1.0 encoding=UTF-8?
web-app xmlns=http://java.sun.com/xml/ns/j2ee;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd;

version=2.4
   descriptionQualiTau Intranet/description
   display-nameQualiTau Intranet/display-name
  
   listener

   listener-classcom.qualitau.startup.JDBCStartup/listener-class
   /listener
   !-- Basic permissions to access any page on the site --
   security-constraint
   web-resource-collection
   web-resource-nameQualiTau Web Applications/web-resource-name
   url-pattern/*/url-pattern
   /web-resource-collection
   auth-constraint
   role-nameportal/role-name
   /auth-constraint
   user-data-constraint
   transport-guaranteeCONFIDENTIAL/transport-guarantee
   /user-data-constraint
   /security-constraint

Thanks again



Carlos

Caldarale, Charles R wrote:
From: Carlos Botto [mailto:carl...@qualitau.com] 
Subject: Problem starting Tomcat in Netbeans


when I validated context.xml I got the following: cvc-elt.1: 
Cannot find the declaration of element 'Context'. [2]



Since there is no DTD to validate against, that's not surprising.

  
Context crossContext=true debug=5 docBase=qualitau 
path=/qualitau reloadable=true
Logger className=org.apache.catalina.logger.FileLogger 
prefix=localhost_my_log. suffix=.txt timestamp=true/



Tomcat has supported a Logger element in quite some time, so that should come out.  
Also, the path attribute is illegal when the Context element is in your webapp's 
META-INF/context.xml file (which is where it should be).

  
Mar 11, 2009 3:54:58 PM org.apache.catalina.startup.ContextConfig 
processContextConfig

SEVERE: Parse error in default web.xml



Note that the above refers to the *default* web.xml, not the one in your 
webapp's WEB-INF directory.  What did you break in Tomcat's conf/web.xml file?

  
Mar 11, 2009 3:54:58 PM org.apache.catalina.startup.ContextConfig 
processContextConfig

SEVERE: Occurred at line 18 column 20



That should give you a pretty good idea of where to look.

 - Chuck


THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY 
MATERIAL and is thus for use only by the intended recipient. If you received 
this in error, please contact the sender and delete the e-mail and its 
attachments from all computers.

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Re: Problem starting Tomcat in Netbeans

[Carlos Botto]

Chuck,

Sorry by mistake I copied the WEB-INF/web.xml. The conf/web.xml is the 
following:


?xml version=1.0 encoding=UTF-8?
web-app version=2.4 xmlns=http://java.sun.com/xml/ns/j2ee; 
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance; 
xsi:schemaLocation=http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd;
 !--  Introduction 
== --
 !-- This document defines default values for *all* web 
applications  --
 !-- loaded into this instance of Tomcat.  As each application 
is --
 !-- deployed, this file is processed, followed by 
the--
 !-- /WEB-INF/web.xml deployment descriptor from your 
own   --
 !-- 
applications.--
 
!--  
--
 !-- WARNING:  Do not configure application-specific resources 
here!  --
 !-- They should go in the /WEB-INF/web.xml file in your 
application.   --
 !-- == Built In Servlet Definitions 
 --
 !-- The default servlet for all web applications, that serves 
static --
 !-- resources.  It processes all requests that are not mapped to 
other   --
 !-- servlets with servlet mappings (defined either here or in your 
own   --
 !-- web.xml file.  This servlet supports the following 
initialization--
 !-- parameters (default values are in square 
brackets):  --
 
!--  
--
 !--   debug   Debugging detail level for messages 
logged --
 !--   by this servlet.  
[0]  --
 
!--  
--
 !--   fileEncodingEncoding to be used to read static 
resources   --
 !--   [platform 
default] --
 
!--  
--
 !--   input   Input buffer size (in bytes) when 
reading  --
 !--   resources to be served.  
[2048]--
 
!--  
--
 !--   listingsShould directory listings be produced if 
there --
 !--   is no welcome file in this directory?  
[false] --
 !--   WARNING: Listings for directories with 
many--
 !--   entries can be slow and may 
consume--
 !--   significant proportions of server 
resources.   --
 
!--  
--
 !--   output  Output buffer size (in bytes) when 
writing --
 !--   resources to be served.  
[2048]--
 
!--  
--
 !--   readonlyIs this context read only, so 
HTTP   --
 !--   commands like PUT and DELETE 
are   --
 !--   rejected?  
[true]  --
 
!--  
--
 !--   readmeFile  File name to display with the 
directory--
 !--   contents. 
[null]   --
 
!--  
--
 !--   sendfileSizeIf the connector used supports sendfile, 
this  --
 !--   represents the minimal file size in KB 
for --
 !--   which sendfile will be used. Use a 
negative--
 !--   value to always disable sendfile.  
[48]--
 
!--  
--
 !--  For directory listing customization. Checks localXsltFile, 
then --
 !--  globalXsltFile, then defaults to original 
behavior. --
 
!--  
--
 !--   localXsltFile   Make directory listings an XML doc 
and --
 !--   pass the result to this style sheet 
residing   --
 !--   in that directory. This 
overrides  --
 !--
globalXsltFile[null]  --
 
!--  
--
 !--   globalXsltFile  Site wide configuration version 
of --
 !--   localXsltFile This argument is 
expected--
 !--   to be a physical file. 
[null]  --
 
!--  
--
 
!--  
--

 !--filter
   

Remote JMX enabling in start scripts

[David Knox]

Hi,
I needed to do this for some testing I'm involved in. Thought it  
might be useful for others also.
I made the changes in the scripts on trunk and tested the build and  
server.


[1]
Index: catalina.sh
===
--- catalina.sh (revision 752728)
+++ catalina.sh (working copy)
@@ -60,6 +60,12 @@
 #   -agentlib:jdwp=transport=$JPDA_TRANSPORT,
 #   address=$JPDA_ADDRESS,server=y,suspend= 
$JPDA_SUSPEND

 #
+#  JMXREMOTE_OPTS  (Optional) Java runtime options used when  
jmxremote start

+# command is executed. This command turns on remote jmx
+# access. For JVM defaults, uncomment only the  
com.sun.
+# management.jmxremote. The other jmxremote  
properties enable
+# finer control and security See: http:// 
java.sun.com/j2se/1.5.0/docs/guide/management/agent.html.

+#
 #   JSSE_HOME   (Optional) May point at your Java Secure  
Sockets Extension
 #   (JSSE) installation, whose JAR files will be  
added to the

 #   system class path used to start Tomcat.
@@ -234,6 +240,19 @@
   shift
 fi

+if [ $1 = jmxremote ]; then
+   echo Remote JMX enabled
+   JMXREMOTE_OPTS=-Dcom.sun.management.jmxremote
+   JMXREMOTE_OPTS=${JMXREMOTE_OPTS} - 
Dcom.sun.management.jmxremote.port=10005

+   echo WARNING - Remote JMX is not securely configured
+# JMXREMOTE_OPTS=${JMXREMOTE_OPTS}  - 
Dcom.sun.management.jmxremote.access.file=access-file-path
+# JMXREMOTE_OPTS=${JMXREMOTE_OPTS} - 
Dcom.sun.management.jmxremote.password.file=password-file-path
+   JMXREMOTE_OPTS=${JMXREMOTE_OPTS} - 
Dcom.sun.management.jmxremote.ssl=false
+   JMXREMOTE_OPTS=${JMXREMOTE_OPTS} - 
Dcom.sun.management.jmxremote.authenticate=false

+   JAVA_OPTS=${JAVA_OPTS} ${JMXREMOTE_OPTS}
+   shift
+fi
+
 if [ $1 = debug ] ; then
   if $os400; then
 echo Debug command not available on OS400

[2]
Index: startup.sh
===
--- startup.sh  (revision 752728)
+++ startup.sh  (working copy)
@@ -61,4 +61,7 @@
   fi
 fi

+# Uncomment to enable remote jmx
+#exec $PRGDIR/$EXECUTABLE jmxremote start $@
+
 exec $PRGDIR/$EXECUTABLE start $@


cheers,
-- dave

David Knox
Information System Architect
+1 303-748-8906
http://pragmaticis.blogspot.com





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Sound

[Gabor Kincses]

Hello,

This should really be pretty simple.  I'm trying to serve up an mp3 file
without any action mapping.  But upon trying to access the file I'm getting
a 404.  What's more interesting is that after directory listing is enabled,
the mp3 file is excluded from the listing.

This is on a pretty vanilla 6.0.18 out of the box on Windows.

Thanks,
Gabor