date:20081119


Dear Chris,

I am setting up a monitoring system for Tomcat servers and I am  
looking

for hard limits in Tomcat servers in general.

I found a few so far: file descriptors, memory pools (ok, these are  
jdk

limits) and thread pools.

Are there any other hard limits that I can run into?


I would call these soft limits, as they can be changed.


Ah, sorry for the confusion. I should have asked for limits that are  
hard at run-time. Thread pool sizes may be editable, but they are  
fixed once Tomcat runs.



What limits are relevant? For instance, Java doesn't allow you to have
any method with more than 64k of code. I suppose that's of little
consequence to a running JVM, since the code would never be loaded.


Yes, I ran into that limit for a generated servlet once. This is not  
the kind of limit that I am looking for, as it is caught compile-time,  
not run-time.


If you are going to count memory (heap?) and file descriptors, I  
suppose

you could also count CPU time, since that is a limitable resource on
*NIX systems.


Hmm. It's really only useful if I can monitor both the maximum  
available time and the used time. I have no idea how I would measure  
that, even at unix level. It gets even more messy in virtual servers.


If you really are talking about soft limits, then you probably also  
want

to see the number of requests accepted but not yet being handled
(controlled by the Connector's acceptCount attribute), the  
number of

request processors (is this thread pools above?), the number of
connections total/available/used in JDBC connection pools.



Ah, that is interesting too: queue fill levels that should under  
normal circumstances be more or less empty. Much like the  
ObjectPendingFinalizationCount. Thanks for that.


How would I use it, though? In my Tomcat acceptCount has a value of  
100. That's probaly an upper limit. What is the 'un-use' property that  
goes with this upper limit?


What MBean can I talk to about JDBC connection pooling?

--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

Human beings make life so interesting. Do you know that in a universe  
so full of wonders,
they have managed to invent boredom. Quite astonishing... -- Terry  
Partchett



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Re: Hard limits in Tomcat?

I think the question you wanna ask yourself first is,
do you want to monitor tomcat or do you want to monitor your application?

regards
Leon

On Wed, Nov 19, 2008 at 3:18 PM, Kees Jan Koster [EMAIL PROTECTED] wrote:
 Dear Chris,

 I am setting up a monitoring system for Tomcat servers and I am looking
 for hard limits in Tomcat servers in general.

 I found a few so far: file descriptors, memory pools (ok, these are jdk
 limits) and thread pools.

 Are there any other hard limits that I can run into?

 I would call these soft limits, as they can be changed.

 Ah, sorry for the confusion. I should have asked for limits that are hard at
 run-time. Thread pool sizes may be editable, but they are fixed once Tomcat
 runs.

 What limits are relevant? For instance, Java doesn't allow you to have
 any method with more than 64k of code. I suppose that's of little
 consequence to a running JVM, since the code would never be loaded.

 Yes, I ran into that limit for a generated servlet once. This is not the
 kind of limit that I am looking for, as it is caught compile-time, not
 run-time.

 If you are going to count memory (heap?) and file descriptors, I suppose
 you could also count CPU time, since that is a limitable resource on
 *NIX systems.

 Hmm. It's really only useful if I can monitor both the maximum available
 time and the used time. I have no idea how I would measure that, even at
 unix level. It gets even more messy in virtual servers.

 If you really are talking about soft limits, then you probably also want
 to see the number of requests accepted but not yet being handled
 (controlled by the Connector's acceptCount attribute), the number of
 request processors (is this thread pools above?), the number of
 connections total/available/used in JDBC connection pools.


 Ah, that is interesting too: queue fill levels that should under normal
 circumstances be more or less empty. Much like the
 ObjectPendingFinalizationCount. Thanks for that.

 How would I use it, though? In my Tomcat acceptCount has a value of 100.
 That's probaly an upper limit. What is the 'un-use' property that goes with
 this upper limit?

 What MBean can I talk to about JDBC connection pooling?

 --
 Kees Jan

 http://java-monitor.com/forum/
 [EMAIL PROTECTED]
 06-51838192

 Human beings make life so interesting. Do you know that in a universe so
 full of wonders,
 they have managed to invent boredom. Quite astonishing... -- Terry Partchett


 -
 To start a new topic, e-mail: users@tomcat.apache.org
 To unsubscribe, e-mail: [EMAIL PROTECTED]
 For additional commands, e-mail: [EMAIL PROTECTED]



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Re: Tomcat vs Daemons

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Nathan,

[EMAIL PROTECTED] wrote:
 In my code, I have a ServletContextListener (configured in web.xml or
 similar file, don't remember exactly), so when the servlet context is
 created it calls contextInitialized(ServletContextEvent).  In this
 function I start the daemon threads.  There is a function
 contextDestroyed which you can use to stop the threads (but note
 Thread.stop is deprecated).

Yup, that'll work. If you subclass Thread (or, better yet, Runnable),
you can add a method that tells the process to stop itself: basically,
you set a flag that your long-running loop (or whatever) periodically
checks to see if it's been set. If it's been set, you simply return from
the run method and the thread stops. This is much better than calling
Thread.stop().

 It sounds like a good idea to start these background threads in a new
 process.  However, I don't know if you can do this in a hosted web
 server environment like the kind you find at mochahost.com and
 dailyrazor.com.  Will need to test it out.

Yeah, you'll need to see what they allow you to do. cron is, of course,
the best choice if it's available. Otherwise, you may have to run your
process from within your web application. :(

- -chris
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Re: Tomcat request processing gets stuck

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Michal,

Michal Singer wrote:
 I am not sure the stuck as any thing to do with the Request Processor
 accumulation.
 I work with nio connector. I use acceptCount=200 so maybe this is why i
 see the 200 Request Processors.

acceptCount=200 just means that the socket will accept 200 clients /in
addition/ to those currently being served by RequestProcessor threads.
The only way to see those waiting clients would be to query the socket
itself (maybe only available at the C-library level?).

 This is the full configuration i use for connector:
 
 Connector executor=AgentExecutor useExecutor=true port=8080
 protocol=org.apache.coyote.http11.Http11NioProtocol SSLEnabled=false
 scheme=http secure=false redirectPort=8443 connectionTimeout=2
 enableLookups=false disableUploadTimeout=true allowTrace=false
 maxSpareThreads=15 maxThreads=500 acceptCount=200/

Your configuration allows for 500 request processors, so seeing only 200
doesn't seem too bad. I agree with Mark's confusion over your
configuration: you seem to be trying to use both a standard connector as
well as an executer. You should pick one and stick with it.

 After running a high load for about an hour, using jmeter as my simulator
 for load, the tomcat stops hanling the requests. jmeter stops sending
 messages since tomcat does not process them. I can't see any stuck on the
 application side. I see that all requests are handled.

Thread dump, thread dump, thread dump!

- -chris
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Re: Hard limits in Tomcat?


Dear Leon,


I think the question you wanna ask yourself first is,
do you want to monitor tomcat or do you want to monitor your  
application?


I want to monitor Tomcat, not the application. I'm using the  
information to improve the Tomcat monitoring on Java-monitor.com.  
Currently you can see the memory pools/thread pools/file descriptors  
and their limits. I was just curious if there are any other pool-like  
structures inside Tomcat.


I'm sure that there are many applications out there that have pools  
and limits, but Java-monitor works for all Tomcats.

--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

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



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Re: Relative redirect with sendRedirect(...)

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Stig,

Stig Kleppe-Jørgensen wrote:
 I stand in this url:
 
 http://host/servletpath/ication/test/fr/ca
 
 and want to go to this url:
 
 http://host/servletpath/ibs/name/test.jar

Why not just use absolute URLs?

httpResponse.sendRedirect(response.encodeRedirectURL(/ibs/name/test.jar));

 When calling 
 
 httpresponse.sendRedirect(../../../../ibs/name/test.jar)

That's too many .. by the way, unless your original URL up at the top
of the message was a path without a resource (i.e. it should have been
.../ca/something).

Taking /servletpath/ication/test/fr/ca and applying 4 .. to it gives
you:

/

:(

 Tomcat generates this url:
 
 http://host/servletpath/ication/test/fr/ca/../../../../ibs/name/test.jar

And what does your client (browser) do with this URL?

 The same worked in Jetty.

I'll bet this works in Jetty because Jetty actually does the
normalization, and won't let you redirect a relative path outside of the
current webapp. Try putting ../../../../../../../../../../../../..
into Jetty and see if it still works.

With Tomcat, the client (browser) is left to interpret the URL and
normalize the path. I'm assuming it does it correctly and sends the user
to http://host/ibs/name/test.jar which, I would imagine, does not exist.

- -chris
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Re: Hard limits in Tomcat?

is there a demo available on the java-monitor.com? sofar i only find a
php forum :-)

Leon

On Wed, Nov 19, 2008 at 3:31 PM, Kees Jan Koster [EMAIL PROTECTED] wrote:
 Dear Leon,

 I think the question you wanna ask yourself first is,
 do you want to monitor tomcat or do you want to monitor your application?

 I want to monitor Tomcat, not the application. I'm using the information to
 improve the Tomcat monitoring on Java-monitor.com. Currently you can see the
 memory pools/thread pools/file descriptors and their limits. I was just
 curious if there are any other pool-like structures inside Tomcat.

 I'm sure that there are many applications out there that have pools and
 limits, but Java-monitor works for all Tomcats.
 --
 Kees Jan

 http://java-monitor.com/forum/
 [EMAIL PROTECTED]
 06-51838192

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


 -
 To start a new topic, e-mail: users@tomcat.apache.org
 To unsubscribe, e-mail: [EMAIL PROTECTED]
 For additional commands, e-mail: [EMAIL PROTECTED]



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6.0.18 download link yeilds HTTP 404

2008-11-19 Thread Leo Donahue - PLANDEVX

http://www.devlib.org/apache/tomcat/tomcat-6/v6.0.18/bin/apache-tomcat-6
.0.18.exe
 
Maybe the site is down?

Re: Hard limits in Tomcat?

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Keen Jan,

Kees Jan Koster wrote:
 Ah, sorry for the confusion. I should have asked for limits that are
 hard at run-time. Thread pool sizes may be editable, but they are fixed
 once Tomcat runs.

Gotcha. Hard runtime limits makes a whole lot more sense. Sorry for not
jumping to that obvious conclusion. I wasn't trying to be a jerk ;)

 What limits are relevant? For instance, Java doesn't allow you to have
 any method with more than 64k of code. I suppose that's of little
 consequence to a running JVM, since the code would never be loaded.
 
 Yes, I ran into that limit for a generated servlet once. This is not the
 kind of limit that I am looking for, as it is caught compile-time, not
 run-time.

Yup: one big, nasty JSP will get you some day.

 If you are going to count memory (heap?) and file descriptors, I suppose
 you could also count CPU time, since that is a limitable resource on
 *NIX systems.
 
 Hmm. It's really only useful if I can monitor both the maximum available
 time and the used time. I have no idea how I would measure that, even at
 unix level. It gets even more messy in virtual servers.

I don't see why virtual servers would be trickier: the kernel should be
counting beans properly. In terms of getting that information, you need
to call getrlimit to see what the limit is. I'm not sure where to get
the current resource usage, though.

 If you really are talking about soft limits, then you probably also want
 to see the number of requests accepted but not yet being handled
 (controlled by the Connector's acceptCount attribute), the number of
 request processors (is this thread pools above?), the number of
 connections total/available/used in JDBC connection pools.
 
 
 Ah, that is interesting too: queue fill levels that should under normal
 circumstances be more or less empty. Much like the
 ObjectPendingFinalizationCount. Thanks for that.
 
 How would I use it, though? In my Tomcat acceptCount has a value of 100.
 That's probaly an upper limit. What is the 'un-use' property that goes
 with this upper limit?

Do you mean something like a minimum accept count? By definition, the
minimum accept count is 0, since you're talking about the number of
connections that the socket will accept. It can certainly always be
zero. But this is an OS thing, and is set when you bind to the socket. I
don't think there's a way to change this through Java after the socket
has been bound.

 What MBean can I talk to about JDBC connection pooling?

You should get yourself a copy of LabmdaProbe and basically steal all
that code. Better yet, just use LambdaProbe and save yourself a lot of
headache. I'm sure they'd appreciate any code you'd like to donate to
the project to sniff other limits (like file descriptors).

- -chris
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Re: 6.0.18 download link yeilds HTTP 404

2008-11-19 Thread Mark Thomas

Leo Donahue - PLANDEVX wrote:
 http://www.devlib.org/apache/tomcat/tomcat-6/v6.0.18/bin/apache-tomcat-6
 .0.18.exe
  
 Maybe the site is down?

Works for me.

Or you can just use a different mirror.

Mark



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RE: 6.0.18 download link yeilds HTTP 404

 From: Leo Donahue - PLANDEVX [mailto:[EMAIL PROTECTED]
 Subject: 6.0.18 download link yeilds HTTP 404

 http://www.devlib.org/apache/tomcat/tomcat-6/v6.0.18/bin/apach
 e-tomcat-6.0.18.exe

 Maybe the site is down?

It's unlikely the DevLib people are monitoring this mailing list, so you should 
probably contact them directly.

In the meantime, try another mirror from the drop-down list.

 - Chuck

THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY 
MATERIAL and is thus for use only by the intended recipient. If you received 
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Re: How do i specify the filename for a binary file generated by a JSP?

-BEGIN PGP SIGNED MESSAGE-
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Jonathan,

Jonathan Mast wrote:
I am writing a report generator that has the ability to generate Excel
files.

This question has already been answered by Youssef, Hassan, and Bill.
I'm going to add a few things that I think are worth mentioning.

There was a magazine at one time called JavaPro that seems to have been
wiped off the face of the planet. I have in front of me a printed
article called Send Files to Browser Clients the /Right Way/ which
answers your question in a 2-page writeup.

The basics are:

1. Use Content-Disposition (as suggested by other responses)
2. Set the Content-Type to application/octet-stream
(This may force a download for browsers such as MSIE that
would rather show you the content than download it)
3. Make sure you don't send more content than is appropriate.
Since you're using a JSP, watch out for excess newlines and
stuff like that you might get with sloppy JSP syntax.

Sweet. The Way Back Machine comes to the rescue:
http://web.archive.org/web/20020604100834/http://www.fawcette.com/javapro/2002_03/online/online_eprods/servlets_03_08/

Enjoy. It's a really old article, but it is actually still correct
(which just isn't true for most of what has been published about Java -
aside from the basics - since it was introduced).

- -chris
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Re: Question on Performance Tuning

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Vasanth,

Vasanth Kumar ravi wrote:
 We did many rounds of load/performance testing with 50 Virtual users, to
 find bottlenecks with the application, major problem found was CPU
 utilization.
 
 1. We did load testing with 1 apache and 1 tomcat, the CPU was arnd 70%
 2. We did load testing with 2 apache and 2 tomcat, the CPU was arnd 70%
 3. We did load testing with 2 apache and 3 tomcat, the CPU was arnd 70%
 4. We did load testing with 2 apache and 4 tomcat, the CPU was arnd 70%

Was your load test designed to test your peak load expectations? IMO,
70% CPU utilization means that you have appropriately sized your
hardware for your demand. I would call that a successful capacity
planning job: you even have a bit of room to grow before adding more
hardware.

Are you just upset that you are using such a high percentage of your CPU?

- -chris

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Re: Tomcat request processing gets stuck

2008-11-19 Thread Michal Singer


Hi, thanks for the response.
I have A few questions regarding your comment:
1. request processors are equivalent to threads?
2. doesn't nio work with one thread? (I thougt that this thread
configuration is irrelevant since nio works with one thread to receive
requests.)
3. I shouldn't work with Executor while working with nio connector?
4. can you send me an example of nio good configuration?

Thank you very much, Michal

Christopher Schultz-2 wrote:
 
 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1
 
 Michal,
 
 Michal Singer wrote:
 I am not sure the stuck as any thing to do with the Request Processor
 accumulation.
 I work with nio connector. I use acceptCount=200 so maybe this is why i
 see the 200 Request Processors.
 
 acceptCount=200 just means that the socket will accept 200 clients /in
 addition/ to those currently being served by RequestProcessor threads.
 The only way to see those waiting clients would be to query the socket
 itself (maybe only available at the C-library level?).
 
 This is the full configuration i use for connector:
 
 Connector executor=AgentExecutor useExecutor=true port=8080
 protocol=org.apache.coyote.http11.Http11NioProtocol SSLEnabled=false
 scheme=http secure=false redirectPort=8443
 connectionTimeout=2
 enableLookups=false disableUploadTimeout=true allowTrace=false
 maxSpareThreads=15 maxThreads=500 acceptCount=200/
 
 Your configuration allows for 500 request processors, so seeing only 200
 doesn't seem too bad. I agree with Mark's confusion over your
 configuration: you seem to be trying to use both a standard connector as
 well as an executer. You should pick one and stick with it.
 
 After running a high load for about an hour, using jmeter as my simulator
 for load, the tomcat stops hanling the requests. jmeter stops sending
 messages since tomcat does not process them. I can't see any stuck on the
 application side. I see that all requests are handled.
 
 Thread dump, thread dump, thread dump!
 
 - -chris
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 qhcAoItqx00LrA4wjAPjLUXgOatJZwie
 =4GQT
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-- 
View this message in context: 
http://www.nabble.com/Tomcat-request-processing-gets-stuck-tp20526036p20581747.html
Sent from the Tomcat - User mailing list archive at Nabble.com.


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Re: JVM/Tomcat startup parameters, HPUX

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André,

André Warnier wrote:
 On a customer HPUX B.11.11 system that we are (remotely and partially)
 managing, I would like to know with which java options (default or
 otherwise) the JVM is being started, particularly the options regarding
 memory usage by the JVM and Tomcat.

I think the only way to observe effective memory settings is to either
run jmap against the running process, or examine it from within by
interrogating the Runtime object. You can also attach a debugger to it,
of course.

- -chris

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Re: Hard limits in Tomcat?


Dear Leon,


is there a demo available on the java-monitor.com? sofar i only find a
php forum :-)


The forum has the monitoring tool built-in. A bit weird at forst, but  
it makes it really simple to post questions, as you can just post  
graphs from the tool right on the forum. No need to make screenshots.  
If you register and log in, the tool shows up.


I have not put any screenshots hi-res on-line yet. I have only two  
hands. :-( I should do that. Here are some low-res ones: http://java-monitor.com/forum/showthread.php?t=123


--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

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





--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

Rule 1 for being in a hole: stop digging.


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Re: Tomcat request processing gets stuck

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Michal,

Michal Singer wrote:
 1. request processors are equivalent to threads?

Yes. The only thing that can execute code is a thread. Given your
configuration, it appears that you will have 500 maximum threads.

I am a little unfamiliar with the NIO connector, but this is what the
documentation says when using useExecutor=true:


If set to true(default) then the max pool size is the maxThreads
attribute and the core pool size is the minSpareThreads. This value is
ignored if the executor attribute is present and points to a valid
shared thread pool.


 2. doesn't nio work with one thread? (I thougt that this thread
 configuration is irrelevant since nio works with one thread to receive
 requests.)

Nope. The NIO connector is just a non-blocking one. A single thread
could never supply suitable performance for a web application. You might
be thinking of Comet, which is a completely different beast.

http://tomcat.apache.org/tomcat-6.0-doc/aio.html

 3. I shouldn't work with Executor while working with nio connector?

Using the executor is perfectly find. I think Chuck and I were confused
since the executor is typically specified separately (as Executor) but
the documentation appears to suggest that an executor will be
automatically created given your configuration.

 4. can you send me an example of nio good configuration?

Your configuration appears to be good, actually. The only problems are:

1. You are nervous about the number of request processors appearing
   (and you probably shouldn't be, unless you are hardly using your
app at all and you are still seeing hundreds of request processor
threads being created)

2. Your application hangs, which is, of course, a serious problem.

For that last one, you'll need to take thread dumps to find out what
your app is waiting on. You might want to scale back the number of
request processors (maxThreads setting) so your thread dumps are small
enough to read without losing your mind.

My guess is that you are hitting your database thread pool limit and the
application is simply waiting for db connections to become available.

- -chris
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RE: JVM/Tomcat startup parameters, HPUX

 From: Christopher Schultz [mailto:[EMAIL PROTECTED]
 Subject: Re: JVM/Tomcat startup parameters, HPUX

 I think the only way to observe effective memory settings is to either
 run jmap against the running process, or examine it from within by
 interrogating the Runtime object. You can also attach a
 debugger to it, of course.

JConsole will provide all the requested information (and much more), assuming 
the HP JVM will accommodate it.  Look at the VM Summary tab for the startup 
options and general heap status; use the Memory tab for details about the heap.

If you run JConsole on the same machine as Tomcat, you don't even need to set 
the com.sun.management.jmxremote system property to look at the basic data.

 - Chuck

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Re: Tomcat request processing gets stuck

2008-11-19 Thread Michal Singer


Thanks again for the great response.
I am not worried about the request processors any more now that i understand
what they mean.
However, i see that when i use the nio, my application gets stuck. i think
working without nio is better.
I am not sure why, if as i know nio is supposed to improve performance.
I am checking my connectors configuration as well as my application getting
stuck.



Christopher Schultz-2 wrote:
 
 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1
 
 Michal,
 
 Michal Singer wrote:
 1. request processors are equivalent to threads?
 
 Yes. The only thing that can execute code is a thread. Given your
 configuration, it appears that you will have 500 maximum threads.
 
 I am a little unfamiliar with the NIO connector, but this is what the
 documentation says when using useExecutor=true:
 
 
 If set to true(default) then the max pool size is the maxThreads
 attribute and the core pool size is the minSpareThreads. This value is
 ignored if the executor attribute is present and points to a valid
 shared thread pool.
 
 
 2. doesn't nio work with one thread? (I thougt that this thread
 configuration is irrelevant since nio works with one thread to receive
 requests.)
 
 Nope. The NIO connector is just a non-blocking one. A single thread
 could never supply suitable performance for a web application. You might
 be thinking of Comet, which is a completely different beast.
 
 http://tomcat.apache.org/tomcat-6.0-doc/aio.html
 
 3. I shouldn't work with Executor while working with nio connector?
 
 Using the executor is perfectly find. I think Chuck and I were confused
 since the executor is typically specified separately (as Executor) but
 the documentation appears to suggest that an executor will be
 automatically created given your configuration.
 
 4. can you send me an example of nio good configuration?
 
 Your configuration appears to be good, actually. The only problems are:
 
 1. You are nervous about the number of request processors appearing
(and you probably shouldn't be, unless you are hardly using your
 app at all and you are still seeing hundreds of request processor
 threads being created)
 
 2. Your application hangs, which is, of course, a serious problem.
 
 For that last one, you'll need to take thread dumps to find out what
 your app is waiting on. You might want to scale back the number of
 request processors (maxThreads setting) so your thread dumps are small
 enough to read without losing your mind.
 
 My guess is that you are hitting your database thread pool limit and the
 application is simply waiting for db connections to become available.
 
 - -chris
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 Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
 
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 MbkAnjjThQY/WEFv65JtmkdENyltkFCF
 =yIAC
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-- 
View this message in context: 
http://www.nabble.com/Tomcat-request-processing-gets-stuck-tp20526036p20582385.html
Sent from the Tomcat - User mailing list archive at Nabble.com.


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RE: Tomcat request processing gets stuck

 From: Christopher Schultz [mailto:[EMAIL PROTECTED]
 Subject: Re: Tomcat request processing gets stuck

  2. doesn't nio work with one thread? (I thougt that this
  thread configuration is irrelevant since nio works with
  one thread to receive requests.)

 Nope. The NIO connector is just a non-blocking one.

To elaborate a bit: that means that HTTP connections in a keep-alive state do 
not consume requests.  The NIO poller will dispatch incoming messages to 
threads on a request basis, rather than allocating a thread per connection as 
the basic HTTP connector does.

  3. I shouldn't work with Executor while working with nio connector?

 Using the executor is perfectly find. I think Chuck and I
 were confused since the executor is typically specified
 separately (as Executor)

When Tomcat 6 was originally released, Remy M cautioned against using an 
executor due to performance problems.  A recent posting by Filip H indicates 
those problems have been resolved and that an executor is the proper thing to 
use for fine-grained control of thread pools.

  4. can you send me an example of nio good configuration?

 Your configuration appears to be good, actually.

Not really - a good one would not include attributes that are ignored.  Can't 
really tell if you config is o.k. with seeing the corresponding Executor 
element.  Since you're using an executor, you should remove the min/max threads 
attributes.

 My guess is that you are hitting your database thread
 pool limit and the application is simply waiting for
 db connections to become available.

Or the app is failing to return connections to the DB pool.  As many have 
suggested in other threads, try testing with a DB pool size of one - it will be 
slow, but any mishandling of DB connections will become painfully obvious.

 - Chuck

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RE: Tomcat request processing gets stuck

 From: Michal Singer [mailto:[EMAIL PROTECTED]
 Subject: Re: Tomcat request processing gets stuck

 I am not sure why, if as i know nio is supposed to improve
 performance.

Not true; NIO improves *capacity*, but it will slightly degrade throughput due 
to more thread switching.

 I am checking my connectors configuration as well as my
 application getting stuck.

Take thread dumps!  Note that JConsole and JVisualVM (among other tools) will 
let you watch your threads on the fly so you can see where they're getting 
stuck.

 - Chuck

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Tomcat Native 6 Remote Debugging (JPDA)

2008-11-19 Thread Gregor Schneider

Hi guys,

we're running Tomcat on Debian on port 80 using Tomcat Native (JSVC).

Now I'm wondering wether it's possible to get remote debugging working here.

I've adapted the the startup-script as follows:

code

#!/bin/sh
export LD_LIBRARY_PATH=/home/tomcat/www/bin/tomcat-native-1.1.3/jni/native/.libs
JAVA_HOME=/usr/lib/jvm/java-1.5.0-sun
CATALINA_HOME=/home/tomcat/www/
DAEMON_HOME=/home/tomcat/www
TOMCAT_USER=tomcat

# for multi instances adapt those lines.
TMP_DIR=/var/tmp
PID_FILE=/var/run/jsvc.pid
CATALINA_BASE=/home/tomcat/www

if [ $2 = jpda ]
then
JPDA_OPTS=-Xdebug
-Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=n
fi

CATALINA_OPTS=-Djava.library.path=/home/tomcat/www/bin/tomcat-native-1.1.3/jni/native/.libs
$JPDA_OPTS
#CATALINA_OPTS=

CLASSPATH=\
$JAVA_HOME/lib/tools.jar:\
$CATALINA_HOME/bin/commons-daemon.jar:\
$CATALINA_HOME/bin/bootstrap.jar

case $1 in
  start)
#
# Start Tomcat
#
#$DAEMON_HOME/src/native/unix/jsvc \
echo Starting tomcat
$DAEMON_HOME/bin/jsvc \
-user $TOMCAT_USER \
-home $JAVA_HOME \
-Dcatalina.home=$CATALINA_HOME \
-Dcatalina.base=$CATALINA_BASE \
-Djava.io.tmpdir=$TMP_DIR \
-Dlog4j.configuration=log4j.xml \
-wait 10 \
-pidfile $PID_FILE \
-outfile $CATALINA_HOME/logs/catalina.out \
-errfile '1' \
$CATALINA_OPTS \
-cp $CLASSPATH \
org.apache.catalina.startup.Bootstrap
#
# To get a verbose JVM
#-verbose \
# To get a debug of jsvc.
#-debug \
exit $?
;;

  stop)
#
# Stop Tomcat
#
echo Stopping tomcat
$DAEMON_HOME/bin/jsvc \
-stop \
-pidfile $PID_FILE \
org.apache.catalina.startup.Bootstrap
exit $?
;;

  *)
echo Usage tomcat.sh start/stop
exit 1;;
esac

/code

netstat shows me that tomcat is listening on port 8787, however, when
connection from within Eclipse (Ganymed), it tell's me Failed to
connect to remote VM. Connection timed out.

tcp0  0 0.0.0.0:87870.0.0.0:*
LISTEN 6780/jsvc.exec
tcp0  0 0.0.0.0:21  0.0.0.0:*
LISTEN 2328/vsftpd
tcp0  0 10.170.202.3:4430.0.0.0:*
LISTEN 6780/jsvc.exec
tcp6   0  0 :::8009 :::*
LISTEN 6780/jsvc.exec
tcp6   0  0 :::80   :::*
LISTEN 6780/jsvc.exec

Now I'm wondering:

- Is it a problem with the native wrapper that it can't cope with
remote-debugging?

- Is it that we're running on port 80, but eclipse requires port 8080
? (haven't found anything to specify a port in Eclipse anyway)

Has anybody got that combination running ever before?

Tomcat-version is 5.5.20 btw.

Cheers

Gregor
-- 
what's puzzlin' you, is the nature of my game
gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
gpgp-key available @ http://pgpkeys.pca.dfn.de:11371

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Re: Hard limits in Tomcat?


Dear Chris,


Ah, sorry for the confusion. I should have asked for limits that are
hard at run-time. Thread pool sizes may be editable, but they are  
fixed

once Tomcat runs.


Gotcha. Hard runtime limits makes a whole lot more sense. Sorry for  
not

jumping to that obvious conclusion. I wasn't trying to be a jerk ;)


Don't worry. Better to ask for clarification than to assume. I wish  
more people would follow your example.


If you are going to count memory (heap?) and file descriptors, I  
suppose

you could also count CPU time, since that is a limitable resource on
*NIX systems.


Hmm. It's really only useful if I can monitor both the maximum  
available
time and the used time. I have no idea how I would measure that,  
even at

unix level. It gets even more messy in virtual servers.


I don't see why virtual servers would be trickier: the kernel should  
be
counting beans properly. In terms of getting that information, you  
need

to call getrlimit to see what the limit is. I'm not sure where to get
the current resource usage, though.


Hmmyeah. We're way off into OS-land here.

Virtual servers get esepcially tricky when a few are running on a host  
and you're in one of them. You may still be able to measure your own  
cpu usage, but you have no idea at all how much was available. So you  
can never tell if you're using what is available or not. I run Java- 
monitor's components on the bare iron for that very reason. So that I  
can see what uses the cpu and optimise the right places.


If you really are talking about soft limits, then you probably  
also want

to see the number of requests accepted but not yet being handled
(controlled by the Connector's acceptCount attribute), the  
number of

request processors (is this thread pools above?), the number of
connections total/available/used in JDBC connection pools.



Ah, that is interesting too: queue fill levels that should under  
normal

circumstances be more or less empty. Much like the
ObjectPendingFinalizationCount. Thanks for that.

How would I use it, though? In my Tomcat acceptCount has a value of  
100.
That's probaly an upper limit. What is the 'un-use' property that  
goes

with this upper limit?


Do you mean something like a minimum accept count? By definition, the
minimum accept count is 0, since you're talking about the number of
connections that the socket will accept. It can certainly always be
zero. But this is an OS thing, and is set when you bind to the  
socket. I

don't think there's a way to change this through Java after the socket
has been bound.


Grr. Off into OS-land again. Oh well. :-)


What MBean can I talk to about JDBC connection pooling?


You should get yourself a copy of LabmdaProbe and basically steal all
that code. Better yet, just use LambdaProbe and save yourself a lot of
headache. I'm sure they'd appreciate any code you'd like to donate to
the project to sniff other limits (like file descriptors).


Yes, LambdaProbe sure looks nice. My probe code is available from  
Google code (http://code.google.com/p/java-monitor-probes/) but really  
all I do so query JMX mbeans.


Hmm. Maybe I should talk to the devs of the new default connection  
pool to incorporate a pool MBean too. That's useful for all of us,  
regardless of monitoring tool in use.


For Java-monitor I have to keep in mind that I cannot do anything  
invasive. I want the probe to be so lightweigth that installation is a  
mere 5 minutes work and has no measurable impact on the JVM's run-time  
performance.

--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

Human beings make life so interesting. Do you know that in a universe  
so full of wonders,
they have managed to invent boredom. Quite astonishing... -- Terry  
Partchett





--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

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



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Re: Servlets / JSP can't connect to MySQL in Ubuntu Server



On Nov 18, 2008, at 7:58 , David Smith wrote:


Can you post your database config and code snippet for accessing the
db?  Obfuscate the username/password info.

One immediate observation is the JDBC url should have the name of the
database you are trying to access like this:

jdbc:mysql://localhost/myDatabase?user= 

--David

TRIMMED

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Here is the test JSP page that I have been using to test multiple  
urls. On my OS X machine they all pass and on the Ubuntu machine they  
all fail with the CommunicationException. As for the url without the  
database, my application attempts to connect to the specific database  
and if that fails it will then try to connect without the database  
specified in the url so it can create the database. Therefore, the  
connection to the url database is only attempted after the connection  
to the url with the database has failed. This method seems to work  
flawlessly on my OS X machine so I dont think that it should cause a  
problem. You will see in my test JSP though, that I'm trying multiple  
different url variations and they all fail with the exact same  
exception.


%--
Document   : index
Created on : Nov 16, 2008, 1:19:22 PM
Author : ambrose
--%

[EMAIL PROTECTED] contentType=text/html pageEncoding=UTF-8%

[EMAIL PROTECTED] import=java.sql.* %

!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN
   http://www.w3.org/TR/html4/loose.dtd;

html
head
meta http-equiv=Content-Type content=text/html;  
charset=UTF-8

titleJSP Page/title
/head
body

%

Class.forName(com.mysql.jdbc.Driver).newInstance();

String[] url = new String[] { jdbc:mysql://localhost/ 
testdb?user=inventorypassword=password,
  jdbc:mysql://localhost/ 
testdb?user=rootpassword=admin,
  jdbc:mysql://127.0.0.1/ 
testdb?user=inventorypassword=password,
  jdbc:mysql://127.0.0.1/ 
testdb?user=rootpassword=admin,
  jdbc:mysql://localhost: 
3306/testdb?user=inventorypassword=password,
  jdbc:mysql://localhost: 
3306/testdb?user=rootpassword=admin,
  jdbc:mysql:// 
127.0.0.1:3306/testdb?user=inventorypassword=password,
  jdbc:mysql:// 
127.0.0.1:3306/testdb?user=rootpassword=admin,


  jdbc:mysql://localhost? 
user=inventorypassword=password,
  jdbc:mysql://localhost? 
user=rootpassword=admin,
  jdbc:mysql://127.0.0.1? 
user=inventorypassword=password,
  jdbc:mysql://127.0.0.1? 
user=rootpassword=admin,
  jdbc:mysql://localhost: 
3306?user=inventorypassword=password,
  jdbc:mysql://localhost: 
3306?user=rootpassword=admin,
  jdbc:mysql:// 
127.0.0.1:3306?user=inventorypassword=password,
  jdbc:mysql:// 
127.0.0.1:3306?user=rootpassword=admin,


  jdbc:mysql://localhost/? 
user=inventorypassword=password,
  jdbc:mysql://localhost/? 
user=rootpassword=admin,
  jdbc:mysql://127.0.0.1/? 
user=inventorypassword=password,
  jdbc:mysql://127.0.0.1/? 
user=rootpassword=admin,
  jdbc:mysql://localhost: 
3306/?user=inventorypassword=password,
  jdbc:mysql://localhost: 
3306/?user=rootpassword=admin,
  jdbc:mysql:// 
127.0.0.1:3306/?user=inventorypassword=password,
  jdbc:mysql:// 
127.0.0.1:3306/?user=rootpassword=admin,


  jdbc:mysql:///? 
user=inventorypassword=password,
  jdbc:mysql:///testdb? 
user=inventorypassword=password

};

for( int i = 0; i  url.length; i++ )
{
String retVal = openConnection(url[i]);

if( retVal == null )
{
out.write(Successful:  + url[i] + br/);
}
else
{
out.write(Failed:  + url[i] + ( + retVal +  
)br/);

}
}

%

%!
public String openConnection(String url)

Re: Servlets / JSP can't connect to MySQL in Ubuntu Server


On Nov 18, 2008, at 7:37 , André Warnier wrote:


Krapacs Ambrose wrote:
I have tried many different configurations and I have been unable  
to get my Servlets / JSP to connect to MySQL server running. I am  
trying to get this set up on my main server which is running Ubuntu  
8.10 Server with MySQL 5 and Tomcat6. I also tried setting up a  
Ubuntu 8.04 server with Tomcat 5.5 and MySQL 5. I have even  
configured Tomcat running on the 8.10 server to try to connect to  
MySQL running on the 8.04 server. Still no luck!

The exception that is thrown is here:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:  
Communications link failure

Hi.
I know little about MySQL and JDBC, but the above seems to be purely  
at the TCP/IP level : your JDBC driver cannot connect to your MySQL  
server.


It seems from the above that you are connecting to localhost  
without indicating a port. I thus suppose that JDBC is going to try  
the standard port on which MySQL is supposed to be listening.
1) So first of all, is that the case ? Is MySQL really listening on  
that port ? (and first of all, is MySQL started ?)

(Try netstat -n | grep LISTEN to see all ports being listened on)

2) are your Tomcat and your MySQL server on the same system ? (since  
you're trying to connect to localhost)


3) if yes, on that system, when you try ping localhost, what does  
it show you ?


4) finally, on the same system, try telnet localhost , where  
 is the port where MySQL is supposedly listening.  What do you  
see then ?



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I have verified that MySQL is running on the correct port. In /etc/ 
conf/my.cnf the bind-address is 127.0.0.1 and the port specified is  
3306. I was able to get the standalone j2se application to connect to  
the MySQL server using the JDBC connector so tomcat should be running.  
I'm trying to set up both Tomcat and MySQL on the same system but  
during my troubleshooting I tried to set up another server with MySQL  
and I could not connect to that server either through Tomcat (same  
result). I've checked the /etc/hosts file to make sure that there is  
an entry for localhost, and pinging localhost seems to return expected  
results. Also, I have tried using telnet to connect to port 3306 and  
it does appear that the server is listening because it refuses the  
telnet connection.

Re: Servlets / JSP can't connect to MySQL in Ubuntu Server



On Nov 18, 2008, at 7:36 , Antonio Vidal Ferrer wrote:


Hi,

It's your mysql listening on Localhost?
Have you tried to use the ip address instead of Localhost?


Best,

Toni

-Original Message-
From: Krapacs Ambrose [mailto:[EMAIL PROTECTED]
Sent: martes, 18 de noviembre de 2008 13:22
To: users@tomcat.apache.org
Subject: Servlets / JSP can't connect to MySQL in Ubuntu Server

I have tried many different configurations and I have been unable to
get my Servlets / JSP to connect to MySQL server running. I am trying
to get this set up on my main server which is running Ubuntu 8.10
Server with MySQL 5 and Tomcat6. I also tried setting up a Ubuntu 8.04
server with Tomcat 5.5 and MySQL 5. I have even configured Tomcat
running on the 8.10 server to try to connect to MySQL running on the
8.04 server. Still no luck!

The exception that is thrown is here:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
Communications link failure
Last packet sent to the server was 0 ms ago.(jdbc:mysql://localhost?
user=invuserpassword=admin))

org
.apache
.jasper
.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java: 
852)

org.apache.jasper.runtime.PageContextImpl.access
$1100(PageContextImpl.java:71)

org.apache.jasper.runtime.PageContextImpl$12.run(PageContextImpl.java:
768)
java.security.AccessController.doPrivileged(Native Method)

org
.apache
.jasper
.runtime.PageContextImpl.handlePageException(PageContextImpl.java:766)
org.apache.jsp.install_jsp._jspService(install_jsp.java:141)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

org
.apache
.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:

342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

sun
.reflect 
.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:

57)

sun
.reflect
.DelegatingMethodAccessorImpl 
.invoke(DelegatingMethodAccessorImpl.java:

43)
java.lang.reflect.Method.invoke(Method.java:616)

org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:537)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:

276)

org
.apache 
.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:

162)
I have verified that MySQL is running and everything with Tomcat seems
to be configured correctly because I can execute servlets and JSP just
fine it's just the connections to MySql to that fail. I have also
executed a standalone java application using the MySQL Connector/J and
that worked fine. I've even tried different ways of deploying the
MySql Connector/J (which is the newest version available) to see if it
was a permissions problem with the library.
The key to this is that the web applications that I am trying to
deploy run flawlessly on my Mac OS X development machine with MySQL. I
haven't tried Windows yet but if I can get this set up to host my web
application I may have to set up a Windows machine to try it.


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Yes I'm sure it is listening on localhost. In /etc/mysql/my.cnf the  
bind-address is set to 127.0.0.1 and also I explained that the  
standalone j2se java application successfully connected to the MySQL  
server via the MySQL JDBC connector. However I have tried using the ip  
address, and I have also tried different combinations specifying and  
omitting the port. Still no luck :(

Re: Servlets / JSP can't connect to MySQL in Ubuntu Server

2008-11-19 Thread David Smith

If you have command line access on the system, can you test your MySQL
connectivity by connecting this way?:

mysql -u inventory -h localhost -p

The -h option forces mysql command to connect via TCP/IP instead of unix
sockets.

--David

Ambrose Krapacs wrote:

 On Nov 18, 2008, at 7:58 , David Smith wrote:

 Can you post your database config and code snippet for accessing the
 db?  Obfuscate the username/password info.

 One immediate observation is the JDBC url should have the name of the
 database you are trying to access like this:

 jdbc:mysql://localhost/myDatabase?user= 

 --David

 TRIMMED

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 Here is the test JSP page that I have been using to test multiple
 urls. On my OS X machine they all pass and on the Ubuntu machine they
 all fail with the CommunicationException. As for the url without the
 database, my application attempts to connect to the specific database
 and if that fails it will then try to connect without the database
 specified in the url so it can create the database. Therefore, the
 connection to the url database is only attempted after the connection
 to the url with the database has failed. This method seems to work
 flawlessly on my OS X machine so I dont think that it should cause a
 problem. You will see in my test JSP though, that I'm trying multiple
 different url variations and they all fail with the exact same exception.

 %--
 Document   : index
 Created on : Nov 16, 2008, 1:19:22 PM
 Author : ambrose
 --%

 [EMAIL PROTECTED] contentType=text/html pageEncoding=UTF-8%

 [EMAIL PROTECTED] import=java.sql.* %

 !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN
http://www.w3.org/TR/html4/loose.dtd;

 html
 head
 meta http-equiv=Content-Type content=text/html;
 charset=UTF-8
 titleJSP Page/title
 /head
 body

 %

 Class.forName(com.mysql.jdbc.Driver).newInstance();

 String[] url = new String[] {
 jdbc:mysql://localhost/testdb?user=inventorypassword=password,
  
 jdbc:mysql://localhost/testdb?user=rootpassword=admin,
  
 jdbc:mysql://127.0.0.1/testdb?user=inventorypassword=password,
  
 jdbc:mysql://127.0.0.1/testdb?user=rootpassword=admin,
  
 jdbc:mysql://localhost:3306/testdb?user=inventorypassword=password,
  
 jdbc:mysql://localhost:3306/testdb?user=rootpassword=admin,
  
 jdbc:mysql://127.0.0.1:3306/testdb?user=inventorypassword=password,
  
 jdbc:mysql://127.0.0.1:3306/testdb?user=rootpassword=admin,

  
 jdbc:mysql://localhost?user=inventorypassword=password,
  
 jdbc:mysql://localhost?user=rootpassword=admin,
  
 jdbc:mysql://127.0.0.1?user=inventorypassword=password,
  
 jdbc:mysql://127.0.0.1?user=rootpassword=admin,
  
 jdbc:mysql://localhost:3306?user=inventorypassword=password,
  
 jdbc:mysql://localhost:3306?user=rootpassword=admin,
  
 jdbc:mysql://127.0.0.1:3306?user=inventorypassword=password,
  
 jdbc:mysql://127.0.0.1:3306?user=rootpassword=admin,

  
 jdbc:mysql://localhost/?user=inventorypassword=password,
  
 jdbc:mysql://localhost/?user=rootpassword=admin,
  
 jdbc:mysql://127.0.0.1/?user=inventorypassword=password,
  
 jdbc:mysql://127.0.0.1/?user=rootpassword=admin,
  
 jdbc:mysql://localhost:3306/?user=inventorypassword=password,
  
 jdbc:mysql://localhost:3306/?user=rootpassword=admin,
  
 jdbc:mysql://127.0.0.1:3306/?user=inventorypassword=password,
  
 jdbc:mysql://127.0.0.1:3306/?user=rootpassword=admin,

  
 jdbc:mysql:///?user=inventorypassword=password,
  
 jdbc:mysql:///testdb?user=inventorypassword=password
 };

 for( int i = 0; i  url.length; i++ )
 {
 String retVal = openConnection(url[i]);

 if( retVal == null )
 {

Re: Hard limits in Tomcat?

well, downloaded, installed, started, klicked, ... deleted...

you should announce that your war is SENDING DATA to the central
server in LARGE letters :-)

which users are you targeting? No one i know (and i'm in the webapp
business for about 10 years) will ever going to use this stuff, since
its opposes all security guidelines which exists in the real
applications world, without considering if its useful or not. It may
sound a bit harsh, but any admin who installs java-monitor webapp on
companies server should be fired at once (and probably will be).

regards
Leon




On Wed, Nov 19, 2008 at 4:27 PM, Kees Jan Koster [EMAIL PROTECTED] wrote:
 Dear Leon,

 is there a demo available on the java-monitor.com? sofar i only find a
 php forum :-)

 The forum has the monitoring tool built-in. A bit weird at forst, but it
 makes it really simple to post questions, as you can just post graphs from
 the tool right on the forum. No need to make screenshots. If you register
 and log in, the tool shows up.

 I have not put any screenshots hi-res on-line yet. I have only two hands.
 :-( I should do that. Here are some low-res ones:
 http://java-monitor.com/forum/showthread.php?t=123


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Re: Servlets / JSP can't connect to MySQL in Ubuntu Server

2008-11-19 Thread André Warnier


Ambrose Krapacs wrote:
[...]
I have tried using telnet to connect to port 3306 and it does appear 
that the server is listening because it refuses the telnet connection.


Well, that would tend to indicate exactly the opposite : either MySQL is 
*not* listening on that port, or something is blocking your telnet from 
connecting to that port.

Otherwise, it would accept to connect.

But try what David suggested first.  If that does not connect, then you 
do have a TCP/IP problem connecting to the MySQL port.
And then maybe there is some kind of firewall or other port-blocking 
software active there.



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Re: Tomcat 6 and javamail

2008-11-19 Thread Don Millhofer

Are you sure that the mail server, serving the host you are deploying to does 
not require authentication?  I got this same error trying to go through the 
Google Mail Server without proper authentication.

when I invoke the component in the webapp I get
javax.mail.AuthenticationFailedException
debug output shows that my components configuration parameters are
IDENTICAL to those used in standalone mode.

You say in Eclipse you use -  (mail.smtp.auth = false) and sends the email.  
Try sending authentication.

private class SMTPAuthenticator extends javax.mail.Authenticator {
@ Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(d_email, d_password);
}
}

Don


At 06:41 AM 11/25/2008, you wrote:
Start by making sure there is only one copy of the javamail jar.   
Remove either the one in tomcat's lib directory or your webapp's lib  
directory.

-- David


On Nov 19, 2008, at 6:04 AM, Lyallex [EMAIL PROTECTED] wrote:

Hi

Tomcat 6.0.16
jdk1.6.0_06
javamail 1.4.1

I have a simple component that uses javamail 1.4.1 to send e-mail
It works perfectly 'standalone' (executed from Eclipse).
It connects to the server (mail.smtp.auth = false)
and sends the email

I've read the available docs at
http://tomcat.apache.org/tomcat-6.0-doc/jndi-resources-howto.html
which talk about activation.jar among others
As I am using jdk 1.6 I understand that this is no longer required (it
is included in the distro).

The javamail 1.4.1 jars are in CATALINA_HOME/lib
I have also tried them in WEB-INF/classes/lib

when I invoke the component in the webapp I get
javax.mail.AuthenticationFailedException
debug output shows that my components configuration parameters are
IDENTICAL to those used in standalone mode.

I am not using jndi resources or resources defined in context.xml, I
am not using tomcats JavaMail session management.

I just need this to work as a simple component without lots of config
to start with.

Can anyone let me in on the 'secret' to getting this to work. I've had
similar components working in earlier releases (and they are still
working)
Something must have changed, I'm rather hoping it's not a securuity
thing but I suspect it might be.

I'm not asking anyone to debug my application I could just do with a
pointer or two.

Any help much appreciated

Cheers
lyallex

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RE: Tomcat request processing gets stuck

2008-11-19 Thread Peter Crowther

 From: Christopher Schultz [mailto:[EMAIL PROTECTED]
 acceptCount=200 just means that the socket will accept 200
 clients /in
 addition/ to those currently being served by RequestProcessor threads.
 The only way to see those waiting clients would be to query
 the socket itself (maybe only available at the C-library level?).

Rarely even that - these connections are held in limbo in the kernel.  There 
are sometimes ways of examining the next request in the queue (to see whether 
you want to accept it or reject it), but I'm not aware of a general way of 
examining *all* requests in an accept queue.  I'd love to hear about any that 
exist, as in the past I've needed to monitor these!

- Peter

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Re: Hard limits in Tomcat?

2008-11-19 Thread Tony Anecito

Better yet do you want to know how the application uses Tomcat resources?

To do what Leon mentions requires a profilier that is approved for production 
use or have the developers write timers in the code for critical measurements 
say around time it takes for a request versus jdbc calls some may have to be an 
aggragate of many calls if that is what is happening like say 1000 calls to get 
data for one servlet method request.
If you can have measurements around the edge of your app and servlet container 
measuements you should bet set for isolating performance issues for some time.

Regards,
-Tony


--- On Wed, 11/19/08, Leon Rosenberg [EMAIL PROTECTED] wrote:

 From: Leon Rosenberg [EMAIL PROTECTED]
 Subject: Re: Hard limits in Tomcat?
 To: Tomcat Users List users@tomcat.apache.org
 Date: Wednesday, November 19, 2008, 7:23 AM
 I think the question you wanna ask yourself first is,
 do you want to monitor tomcat or do you want to monitor
 your application?
 
 regards
 Leon
 
 On Wed, Nov 19, 2008 at 3:18 PM, Kees Jan Koster
 [EMAIL PROTECTED] wrote:
  Dear Chris,
 
  I am setting up a monitoring system for Tomcat
 servers and I am looking
  for hard limits in Tomcat servers in general.
 
  I found a few so far: file descriptors, memory
 pools (ok, these are jdk
  limits) and thread pools.
 
  Are there any other hard limits that I can run
 into?
 
  I would call these soft limits, as they can be
 changed.
 
  Ah, sorry for the confusion. I should have asked for
 limits that are hard at
  run-time. Thread pool sizes may be editable, but they
 are fixed once Tomcat
  runs.
 
  What limits are relevant? For instance, Java
 doesn't allow you to have
  any method with more than 64k of code. I suppose
 that's of little
  consequence to a running JVM, since the code would
 never be loaded.
 
  Yes, I ran into that limit for a generated servlet
 once. This is not the
  kind of limit that I am looking for, as it is caught
 compile-time, not
  run-time.
 
  If you are going to count memory (heap?) and file
 descriptors, I suppose
  you could also count CPU time, since that is a
 limitable resource on
  *NIX systems.
 
  Hmm. It's really only useful if I can monitor both
 the maximum available
  time and the used time. I have no idea how I would
 measure that, even at
  unix level. It gets even more messy in virtual
 servers.
 
  If you really are talking about soft limits, then
 you probably also want
  to see the number of requests accepted but not yet
 being handled
  (controlled by the Connector's
 acceptCount attribute), the number of
  request processors (is this thread
 pools above?), the number of
  connections total/available/used in JDBC
 connection pools.
 
 
  Ah, that is interesting too: queue fill levels that
 should under normal
  circumstances be more or less empty. Much like the
  ObjectPendingFinalizationCount. Thanks for that.
 
  How would I use it, though? In my Tomcat acceptCount
 has a value of 100.
  That's probaly an upper limit. What is the
 'un-use' property that goes with
  this upper limit?
 
  What MBean can I talk to about JDBC connection
 pooling?
 
  --
  Kees Jan
 
  http://java-monitor.com/forum/
  [EMAIL PROTECTED]
  06-51838192
 
  Human beings make life so interesting. Do you know
 that in a universe so
  full of wonders,
  they have managed to invent boredom. Quite
 astonishing... -- Terry Partchett
 
 
 
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 [EMAIL PROTECTED]
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 [EMAIL PROTECTED]
 
 
 
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Re: CometProcessor questions

2008-11-19 Thread Franck Wolff


Hi Filip,

Ok, my (partly) mistake. I've missread this comment:

///GET method or application/x-www-form-urlencoded/

in BayeuxServlet.checkBayeux...

Anyway, I can't change everything now and I need to read the request 
input stream (I'm getting AMF3 binary data), not to get a request 
parameter as in:


String message = 
cometEvent.getHttpServletRequest().getParameter(Bayeux.MESSAGE_PARAMETER);

When you speak about patches in the trunk, does it apply to comet 
support in general or the Bayeux impl, and what issue is it intented to 
fix? Will it be available in 6.0.19 and (approximatively) when?


Thanks for your reply,
Franck.

it only does POST, no GET messages,

there is a patch pending (and one already applied) for 6.0 when it 
comes to comet, so testing with trunk would be best


Filpi

Franck Wolff wrote:

Hi again,

I just checked the Bayeux in Tomcat and it cannot work for me: it 
seems to only support GET request (am I wrong?)...


Regards,
Franck.


Hi,

Thanks for your reply!

I didn't know about this Bayeux impl in Tomcat, so I developed my 
own implementation (that is not strictly conforming to the spec, 
just very close).


I'm going to check this module and see if I can get some hints.

What about the CLIENT_DISCONNECT event sub type? Any hints?

Regards,
Franck.


hi Franck, are you using this Bayeux impl?
http://svn.apache.org/viewvc/tomcat/trunk/modules/bayeux/

or do you have your own?


Filip

Franck Wolff wrote:

Hi,

I'm developing Tomcat/Comet support for Granite Data Service 
http://www.graniteds.org (Flex clients) and I've got few 
questions about CometEvents processing. Basically, my 
implementation is based on the Bayeux protocol (long-polling only) 
and two connections (command/tunnel) are opened for each clients 
(producer/consumer). I use a thread pool in order to dispatch 
received messages to each consumer subscribed to the relevant 
topic. Here are my questions:


1. What should happen exactly if Tomcat send a timeout event when 
the current event (ie: a previous BEGIN event whose request input 
stream was fully read when it was received) is used for writing a 
response? Is this previous BEGIN still valid and may be used to 
write the response? If not, should it be close right away and may 
I use the timeout event instead or should I wait for a next BEGIN 
event? Is it the same event instance whose type/subtype has changed?


2. Tomcat send me sometime (rather rare but it happens) invalid 
END events (getHttpServletRequest() issues a 
NullPointerException). I'm just trying by now to close them and it 
don't affect my application behavior but I'm wondering why those 
invalid event aren't thrown away by Tomcat from the beginning and 
what should be done exactly with them?


3. I'm never receiving any ERROR event except for TIMEOUTs. I 
would be of course very interested in CLIENT_DISCONNECT events but 
I couldn't find any case where Tomcat would send me this handful 
event... I was expecting this event to be raised when the client 
app is closed or the net connection broken but Tomcat just stops 
sending me TIMEOUT events. It may be useful to say that I'm using 
APR and not NIO...


3. Would it be possible to use the Tomcat pool thread for sending 
the responses instead of creating and managing my own thread pool 
(I'm using standard Runnable objects submitted to my own pool but 
I could submit them to any other thread pool as well)?


4. Under stress tests (12 clients sending 10 messages/sec. while 
listening for the same topic, ie: they may get 12*10 
messages/sec., but some of them (~5-10) are generally packaged in 
the same response), asynchronous read doesn't work anymore: a full 
read of the input stream must be done on the BEGIN event, 
otherwise, it seems that most incomming requests are lost... I 
didn't try to figure out what's going on but, as a matter of fact, 
asynchronous read seems to be broken on heavy load (just 
informative, I can use full read on the begin event).


Regards, thanks in advance for any reply,
Franck.




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Re: Servlets / JSP can't connect to MySQL in Ubuntu Server



On Nov 19, 2008, at 11:13 , David Smith wrote:


If you have command line access on the system, can you test your MySQL
connectivity by connecting this way?:

mysql -u inventory -h localhost -p

The -h option forces mysql command to connect via TCP/IP instead of  
unix

sockets.

--David


Yes I can log into mysql using the command terminal fro the system and  
specifying the -h parameter. Again, my test using the standard j2se  
application to connect to MySQL using the JDBC connector proves that  
the problem does not have to do with MySQL.


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Re: Supporting Large Number of Web Application Instances

2008-11-19 Thread John Shilling

I am looking at having to support tens or even hundres of instances of our
web application in an ASP Model.  We use Tomcat as our application server
and it seems to me that three possibilities as a base model for each
physical server

1.  Have a single Tomcat instance per server with multiple virtual hosts
2.  Have multiple Tomcat instances on a single OS instance and host one web
app per Tomcat instance
3.  User virtual servers to host one Tomcat Instance per Virtual OS and host
one web app per Tomcat instance.

As you go down the stack it seems you use more resources per app instance
but get more isolation.

This is really like an SMP at the application level but each application
instance will connect to a distinct database (this is a domain where
crossing the beams would be bad).

Do people really do option #1 in a production environment?  I can figure out
how to set up realms for initialization parameters but it is still a single
class namespace within the Tomcat container, right?  It seems that special
care must be taken with singleton objects (such as the Hibernate Session
Factory) so make sure that they are managed in the context of their Virtual
Host/App Instance.

Are there established practices for doing #1?

Thanks,
John

Re: Hard limits in Tomcat?


Dear Leon,


well, downloaded, installed, started, klicked, ... deleted...

you should announce that your war is SENDING DATA to the central
server in LARGE letters :-)

which users are you targeting? No one i know (and i'm in the webapp
business for about 10 years) will ever going to use this stuff, since
its opposes all security guidelines which exists in the real
applications world, without considering if its useful or not. It may
sound a bit harsh, but any admin who installs java-monitor webapp on
companies server should be fired at once (and probably will be).


Oh, don't be so dramatic. There is a whole world out there of smaller  
companies that have one or two Tomcat servers in production, running  
on the cheapest shared server environment they could find. This  
product targets companies that have two or three developers, one of  
whom has been pressed into doing the admin role on the side.


I apologize if the operational model of Java-monitor startled you.  
That was not my intention. It works this way because that takes the  
care and feeding of the monitoring platform away from the user. Some  
people like that while others, such as yourself, prefer not to work  
like this.


Even in large companies, Java-monitor has its place. I spoke to one of  
my users this week and he tells me that he uses Java-monitor on the  
test machine because the process of getting JBoss performance  
statistics out of their hosting company takes days. I like it because  
I can check the status of my servers from my iPhone.

--
Kees Jan

http://java-monitor.com/forum/
[EMAIL PROTECTED]
06-51838192

Rule 1 for being in a hole: stop digging.


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java.lang.Exception: Socket bind failed: [730048]

2008-11-19 Thread Toby Kurien

Hi Everybody,
I have been using Apache Tomcat 5.5.23 with Java 1.5.0_12. OS is Windown Server
2003. Tomcat connects to an Informix database and I have been using this
application at my company without any major issues so far for more than 2
years. Lately we noticed some suspicious activities reported by Symantec and
there seems to be some phony user ids being created under Local Users and
Groups. Soon after that, the response from the Tomcat application
seems to be pretty
slow. I use jsp and jdbc to connect to the Informix database and there is
nothing too complex about that. I have attached a log file of the errors I am
getting while trying to start Tomcat.
It would be great as we are apprehensive that it is a security breach as the
application starts fine every time. My development servers that have same
configuration and connecting to the same Informix Database are running fine.
Please help at the earliest as the application is critical to the company. Do
let me know of other information you may need.

Here is the log file error:

Nov 19, 2008 12:55:22 PM org.apache.coyote.http11.Http11AprProtocol init
SEVERE: Error initializing endpoint
java.lang.Exception: Socket bind failed: [730048] Only one usage of
each socket address (protocol/network address/port) is normally
permitted.
   at org.apache.tomcat.util.net.AprEndpoint.init(AprEndpoint.java:576)
   at 
org.apache.coyote.http11.Http11AprProtocol.init(Http11AprProtocol.java:116)
   at 
org.apache.catalina.connector.Connector.initialize(Connector.java:1017)
   at 
org.apache.catalina.core.StandardService.initialize(StandardService.java:578)
   at 
org.apache.catalina.core.StandardServer.initialize(StandardServer.java:782)
   at org.apache.catalina.startup.Catalina.load(Catalina.java:504)
   at org.apache.catalina.startup.Catalina.load(Catalina.java:524)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:267)
   at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
Nov 19, 2008 12:55:22 PM org.apache.catalina.startup.Catalina load
SEVERE: Catalina.start
LifecycleException:  Protocol handler initialization failed:
java.lang.Exception: Socket bind failed: [730048] Only one usage of
each socket address (protocol/network address/port) is normally
permitted.
   at 
org.apache.catalina.connector.Connector.initialize(Connector.java:1019)
   at 
org.apache.catalina.core.StandardService.initialize(StandardService.java:578)
   at 
org.apache.catalina.core.StandardServer.initialize(StandardServer.java:782)
   at org.apache.catalina.startup.Catalina.load(Catalina.java:504)
   at org.apache.catalina.startup.Catalina.load(Catalina.java:524)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:267)
   at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
Nov 19, 2008 12:55:22 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1906 ms
Nov 19, 2008 12:55:22 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Nov 19, 2008 12:55:22 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.5.23
Nov 19, 2008 12:55:22 PM org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
Nov 19, 2008 12:55:26 PM org.apache.coyote.http11.Http11AprProtocol start
SEVERE: Error starting endpoint
java.lang.Exception: Socket bind failed: [730048] Only one usage of
each socket address (protocol/network address/port) is normally
permitted.
   at org.apache.tomcat.util.net.AprEndpoint.init(AprEndpoint.java:576)
   at org.apache.tomcat.util.net.AprEndpoint.start(AprEndpoint.java:686)
   at 
org.apache.coyote.http11.Http11AprProtocol.start(Http11AprProtocol.java:146)
   at org.apache.catalina.connector.Connector.start(Connector.java:1090)
   at 
org.apache.catalina.core.StandardService.start(StandardService.java:457)
   at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
   at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
   at

Re: Servlets / JSP can't connect to MySQL in Ubuntu Server

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Ambrose,

Ambrose Krapacs wrote:
 catch( Exception e )
 {
 retVal = e.toString();
 }

And this gives you CommunicationLinkFailure for every URL you are trying?

A few things about the URLs:

1. Don't bother testing 127.0.0.1 /and/ localhost. If your machine
hasn't been misconfigured, localhost should point to 127.0.0.1.

2. You must specify the name of a database, so URLs like
   jdbc:mysql://localhost?foo=bar are malformed.

3. Consider picking a single username/password and sticking with it.
   If you can't open a connection, the use of multiple sets of
   credentials is just complicating your script and gathering excess
   (useless) data.

4. The default port is 3306, so you don't need to specify it in your
   URLs.

Are you running Tomcat under a security manager? That would certainly
prevent you from communicating. Can you use 'ps' to show us the command
line that is being used to start Tomcat? That would help.

- -chris
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sx8An3YE1nwEsX3Sadmq4qBwsSPFS2Q1
=EI1G
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RE: java.lang.Exception: Socket bind failed: [730048]

 From: Toby Kurien [mailto:[EMAIL PROTECTED]
 Subject: java.lang.Exception: Socket bind failed: [730048]

 I have attached a log file of the errors I am
 getting while trying to start Tomcat.

 Nov 19, 2008 12:55:22 PM
 org.apache.coyote.http11.Http11AprProtocol init
 SEVERE: Error initializing endpoint
 java.lang.Exception: Socket bind failed: [730048] Only one usage of
 each socket address (protocol/network address/port) is normally
 permitted.
at
 org.apache.tomcat.util.net.AprEndpoint.init(AprEndpoint.java:576)
at
 org.apache.coyote.http11.Http11AprProtocol.init(Http11AprProtocol.java:116)

The error indicates something else is already using port 80, thereby preventing 
Tomcat from accessing it.  Since you also have an AJP connector, you may be 
running Tomcat behind IIS or some other web server that handles port 80 and 
forwards requests to AJP on 8009.

If you don't expect anything else to be using port 80, then something has crept 
in that's usurping Tomcat.  (Or you may just be trying to run the same Tomcat 
twice.)

 - Chuck

THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY 
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this in error, please contact the sender and delete the e-mail and its 
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Re: Supporting Large Number of Web Application Instances

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

John,

John Shilling wrote:
 Do people really do option #1 in a production environment?

Sure.

 I can figure out how to set up realms for initialization parameters
 but it is still a single class namespace within the Tomcat container,
 right?

Not really. One of the container's jobs is to isolate webapps from each
other so they don't interfere.

 It seems that special care must be taken with singleton objects (such
 as the Hibernate Session Factory) so make sure that they are managed
 in the context of their Virtual Host/App Instance.

Yes. Each webapp gets its own ClassLoader which loads classes from that
webapp's WEB-INF/lib/*.jar files. Assuming that your webapps are
self-contained, even singletons should operate correctly alongside
each other in different webapps. I'm not expert at Tomcat internal
workings, but I expect that the level of isolation between two webapps
in the same Virtual Host is the same as the level of isolation between
two webapps in different Virtual Hosts.

 Are there established practices for doing #1?

Do not put any libraries in the server's shared class loaders unless
it's okay that they actually be shared. For instance, don't shove
Hibernate's JAR in there so you can save a little memory by sharing the
classes. If you do that, you've crossed the streams so to speak.

The main thing I would be worried about is the apps stealing time from
each other. There's not a whole lot you can do about that except get
more hardware. There's also the possibility of upgrades and such. do you
want to be able to run some clients/customers on different versions of
your application that require different JVMs, for instance? It should be
obvious that a Tomcat instance must run on only one JVM at a time ;)

- -chris
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pCgAn06jbdr4DDysNXNfLoK8uRP9DqLm
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cluster configuration

2008-11-19 Thread Mike Wannamaker

I'm having an issue with clustering in tomcat and tribes.

I get this output, I'm not sure why Tribes can't bind to the multicast
address?  It then binds to localhost which doesn't allow machines to see
each other.

Any help is appreciated.

19-Nov-2008 3:30:23 PM org.apache.catalina.tribes.transport.ReceiverBase
bind
INFO: Receiver Server Socket bound to:/10.6.2.89:4000
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Attempting to bind the multicast socket to /239.176.50.121:45566
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Binding to multicast address, failed. Binding to port only.
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Setting multihome multicast interface to:localhost/127.0.0.1
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Setting cluster mcast soTimeout to 500
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Sleeping for 1000 milliseconds to establish cluster membership,
start level:4
19-Nov-2008 3:30:24 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Done sleeping, membership established, start level:4
19-Nov-2008 3:30:24 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Sleeping for 1000 milliseconds to establish cluster membership,
start level:8
19-Nov-2008 3:30:25 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Done sleeping, membership established, start level:8
Initializing 3rdParty Loggers

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Re: Hard limits in Tomcat?

Hello Kees Jan,

On Wed, Nov 19, 2008 at 8:25 PM, Kees Jan Koster [EMAIL PROTECTED] wrote:
 Dear Leon,

 Oh, don't be so dramatic. There is a whole world out there of smaller
 companies that have one or two Tomcat servers in production, running on the
 cheapest shared server environment they could find. This product targets
 companies that have two or three developers, one of whom has been pressed
 into doing the admin role on the side.

yes, but why should they give their very sensitive data into the hand
of someone? You understand that tomcat operation profile provides
perfect opportunity for a potential attacker or competitor? Especially
when there are tools which does the same without giving the data away.


 I apologize if the operational model of Java-monitor startled you. That was
 not my intention. It works this way because that takes the care and feeding
 of the monitoring platform away from the user. Some people like that while
 others, such as yourself, prefer not to work like this.

Why dont you just supply another web/app which collects the data
locally in the customers environment?



 Even in large companies, Java-monitor has its place. I spoke to one of my
 users this week and he tells me that he uses Java-monitor on the test
 machine because the process of getting JBoss performance statistics out of
 their hosting company takes days. I like it because I can check the status
 of my servers from my iPhone.

Again, there are tools which perform the same or more without giving
the data to potential competitor or hacker. Check lambdaprobe (tomcat
level) or moskito (application level).


Regards
Leon



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Re: cluster configuration

2008-11-19 Thread Gustavo Araujo

Instead of puting 127.0.0.1 in your conf file (server.xml) put the real ip
adress of your server.

Restart the server and look at catalina.out.

Regards.

2008/11/19 Mike Wannamaker [EMAIL PROTECTED]

 I'm having an issue with clustering in tomcat and tribes.

 I get this output, I'm not sure why Tribes can't bind to the multicast
 address?  It then binds to localhost which doesn't allow machines to see
 each other.

 Any help is appreciated.

 19-Nov-2008 3:30:23 PM org.apache.catalina.tribes.transport.ReceiverBase
 bind
 INFO: Receiver Server Socket bound to:/10.6.2.89:4000
 19-Nov-2008 3:30:23 PM
 org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
 INFO: Attempting to bind the multicast socket to /239.176.50.121:45566
 19-Nov-2008 3:30:23 PM
 org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
 INFO: Binding to multicast address, failed. Binding to port only.
 19-Nov-2008 3:30:23 PM
 org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
 INFO: Setting multihome multicast interface to:localhost/127.0.0.1
 19-Nov-2008 3:30:23 PM
 org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
 INFO: Setting cluster mcast soTimeout to 500
 19-Nov-2008 3:30:23 PM
 org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
 INFO: Sleeping for 1000 milliseconds to establish cluster membership,
 start level:4
 19-Nov-2008 3:30:24 PM
 org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
 INFO: Done sleeping, membership established, start level:4
 19-Nov-2008 3:30:24 PM
 org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
 INFO: Sleeping for 1000 milliseconds to establish cluster membership,
 start level:8
 19-Nov-2008 3:30:25 PM
 org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
 INFO: Done sleeping, membership established, start level:8
 Initializing 3rdParty Loggers

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-- 
Gustavo Campos Araujo

Re: Supporting Large Number of Web Application Instances

2008-11-19 Thread David Wall



John Shilling wrote:

I am looking at having to support tens or even hundres of instances of our
web application in an ASP Model.  
We basically do this now using a single Tomcat instance with multiple 
webapps (https://host.com/App1/, https//host.com/App2/ etc) and 
don't use virtual servers because we use SSL, and to make that work, 
you'd need multiple IP addresses, multiple keystores and multiple SSL 
certs.  In our model, that's not a requirement.


We're only doing about 50 webapps per Tomcat now, so whether it could do 
hundreds, is hard to say.  Also, obviously, it depends on the 
networking, memory, processor and disk capabilities to support all of 
those.  I mean, if one webapp is doing millions of transactions per day, 
you may find few servers that could handle lots of those together, and 
if one is transferring lots of data in and out, it could hog up 
bandwidth, etc.  And of course one webapps usage will impact the 
performance of others, so you'll probably need to balance webapps as you 
scale up.


Each of our webapps can run different versions of our base software, but 
as mentioned before, they all must run on the same version of Tomcat and 
Java -- and in and our case, the same version of the backend PostgreSQL 
database which hosts a database per webapp. 


It's worked well for us so far.

David


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Re: CometProcessor questions

2008-11-19 Thread Filip Hanik - Dev Lists


hi Franck,

Franck Wolff wrote:

Hi Filip,

Ok, my (partly) mistake. I've missread this comment:

///GET method or application/x-www-form-urlencoded/

in BayeuxServlet.checkBayeux...

Anyway, I can't change everything now and I need to read the request 
input stream (I'm getting AMF3 binary data), not to get a request 
parameter as in:
if you need to stream up data, no need to do that using Bayeux, just use 
a regular servlet for that.


String message = 
cometEvent.getHttpServletRequest().getParameter(Bayeux.MESSAGE_PARAMETER); 



When you speak about patches in the trunk, does it apply to comet 
support in general or the Bayeux impl, and what issue is it intented 
to fix? Will it be available in 6.0.19 and (approximatively) when?
both, some fixes are for the Comet behavior and Bayeux will exist as an 
independent module.
There are a few fixes already applied in the 6.0.x branch, and a couple 
of more are pending, waiting for review


Filip


Thanks for your reply,
Franck.

it only does POST, no GET messages,

there is a patch pending (and one already applied) for 6.0 when it 
comes to comet, so testing with trunk would be best


Filpi

Franck Wolff wrote:

Hi again,

I just checked the Bayeux in Tomcat and it cannot work for me: it 
seems to only support GET request (am I wrong?)...


Regards,
Franck.


Hi,

Thanks for your reply!

I didn't know about this Bayeux impl in Tomcat, so I developed my 
own implementation (that is not strictly conforming to the spec, 
just very close).


I'm going to check this module and see if I can get some hints.

What about the CLIENT_DISCONNECT event sub type? Any hints?

Regards,
Franck.


hi Franck, are you using this Bayeux impl?
http://svn.apache.org/viewvc/tomcat/trunk/modules/bayeux/

or do you have your own?


Filip

Franck Wolff wrote:

Hi,

I'm developing Tomcat/Comet support for Granite Data Service 
http://www.graniteds.org (Flex clients) and I've got few 
questions about CometEvents processing. Basically, my 
implementation is based on the Bayeux protocol (long-polling 
only) and two connections (command/tunnel) are opened for each 
clients (producer/consumer). I use a thread pool in order to 
dispatch received messages to each consumer subscribed to the 
relevant topic. Here are my questions:


1. What should happen exactly if Tomcat send a timeout event when 
the current event (ie: a previous BEGIN event whose request input 
stream was fully read when it was received) is used for writing a 
response? Is this previous BEGIN still valid and may be used to 
write the response? If not, should it be close right away and may 
I use the timeout event instead or should I wait for a next BEGIN 
event? Is it the same event instance whose type/subtype has changed?


2. Tomcat send me sometime (rather rare but it happens) invalid 
END events (getHttpServletRequest() issues a 
NullPointerException). I'm just trying by now to close them and 
it don't affect my application behavior but I'm wondering why 
those invalid event aren't thrown away by Tomcat from the 
beginning and what should be done exactly with them?


3. I'm never receiving any ERROR event except for TIMEOUTs. I 
would be of course very interested in CLIENT_DISCONNECT events 
but I couldn't find any case where Tomcat would send me this 
handful event... I was expecting this event to be raised when the 
client app is closed or the net connection broken but Tomcat just 
stops sending me TIMEOUT events. It may be useful to say that I'm 
using APR and not NIO...


3. Would it be possible to use the Tomcat pool thread for sending 
the responses instead of creating and managing my own thread pool 
(I'm using standard Runnable objects submitted to my own pool but 
I could submit them to any other thread pool as well)?


4. Under stress tests (12 clients sending 10 messages/sec. while 
listening for the same topic, ie: they may get 12*10 
messages/sec., but some of them (~5-10) are generally packaged in 
the same response), asynchronous read doesn't work anymore: a 
full read of the input stream must be done on the BEGIN event, 
otherwise, it seems that most incomming requests are lost... I 
didn't try to figure out what's going on but, as a matter of 
fact, asynchronous read seems to be broken on heavy load (just 
informative, I can use full read on the begin event).


Regards, thanks in advance for any reply,
Franck.




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Re: cluster configuration

2008-11-19 Thread Filip Hanik - Dev Lists


just to make sure

1. you are using 6.0.18
and
2. the IP you are trying to bind to is valid
and
3. could you be using linux?

this is the code that is telling you about the failure

186 : fhanik 586228  if (mcastBindAddress != null) {
187 : try {
188 : log.info(Attempting to bind the multicast socket 
to +address+:+port);
189 : socket = new MulticastSocket(new 
InetSocketAddress(address,port));

190 : } catch (BindException e) {
191 : /*
192 : * On some plattforms (e.g. Linux) it is not 
possible to bind
193 : * to the multicast address. In this case only bind 
to the

194 : * port.
195 : */
196 : log.info(Binding to multicast address, failed. 
Binding to port only.);

197 : socket = new MulticastSocket(port);
198 : }

Mike Wannamaker wrote:

I'm having an issue with clustering in tomcat and tribes.

I get this output, I'm not sure why Tribes can't bind to the multicast
address?  It then binds to localhost which doesn't allow machines to see
each other.

Any help is appreciated.

19-Nov-2008 3:30:23 PM org.apache.catalina.tribes.transport.ReceiverBase
bind
INFO: Receiver Server Socket bound to:/10.6.2.89:4000
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Attempting to bind the multicast socket to /239.176.50.121:45566
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Binding to multicast address, failed. Binding to port only.
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Setting multihome multicast interface to:localhost/127.0.0.1
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Setting cluster mcast soTimeout to 500
19-Nov-2008 3:30:23 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Sleeping for 1000 milliseconds to establish cluster membership,
start level:4
19-Nov-2008 3:30:24 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Done sleeping, membership established, start level:4
19-Nov-2008 3:30:24 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Sleeping for 1000 milliseconds to establish cluster membership,
start level:8
19-Nov-2008 3:30:25 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Done sleeping, membership established, start level:8
Initializing 3rdParty Loggers

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RE: Using Tomcat with ISAPI Redirector

2008-11-19 Thread Patrick Markiewicz

Hi,
I finally found an answer to my problem, thanks to a few posts
on the interenet.
Here they mention the fact that NETWORK SERVICE needs WRITE
access to the directory defined by the log_file key under
HKEY_LOCAL_MACHINE\SOFTWARE\Apache Software Foundation\Jakarta Isapi
Redirector\1.0 in the registry:
http://forums.iis.net/p/1150483/1874510.aspx

With that, I was finally able to see the behavior of redirecting
to /jakarta/isapi_redirect.dll.  Thanks to an old mail post by Larry
Isaacs back in 2002.  My problem was that I had the isapi_redirect.dll
defined in both the Default Website AND the Web Sites folder in IIS.
As Larry explains here:
http://www.mail-archive.com/[EMAIL PROTECTED]/msg55430.html

So the moral is:  When you see something like ' Default redirection of
/jakarta/isapi_redirect.dll ' or ' [/jakarta/isapi_redirect.dll] is not
a servlet url ' in the redirect log as if it is searching tomcat for
that resource, then you have at least 2 redirect filters defined in IIS.

Patrick

-Original Message-
From: Patrick Markiewicz [mailto:[EMAIL PROTECTED] 
Sent: Thursday, July 24, 2008 2:28 PM
To: Tomcat Users List
Subject: Using Tomcat with ISAPI Redirector

Hi,
I'm using Apache Tomcat/5.5.4 with Plesk 8.2 on a Windows Server
2003 machine.  The isapi redirector program is supposed to allow me to
connect to my server, and redirect my request to Tomcat, if the url
matches a certain pattern.  I have multiple sites configured in IIS,
including: PleskControlPanel and Default Web Site.

Default Web Site was previously configured with a jakarta virtual
directory that allows the isapi redirector to work properly.  When I try
to access http://www.example.com/examples, I find the tomcat error:
HTTP Status 404 - /examples/

I configured PleskControlPanel (port 8880, ssl port 8443) to use a
second jakarta virtual directory.  However, when I try to access
http://www.example.com:8880/examples, I find the tomcat error:
HTTP Status 404 - /jakarta/isapi_redirect.dll

Does anyone know why IIS would be passing the URI:
/jakarta/isapi_redirect.dll to Tomcat at that point?  Is there a way to
configure IIS so that /jakarta/isapi_redirect.dll is resolved properly
(as the filter, not the URI) and so that the next URI delivered to
Tomcat is /examples/ ?

Patrick

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How to tell Tomcat not to log certain requests?

2008-11-19 Thread blender1968


Hi All,

There are certain requests that I don't want written to the AccessLog.

In Apache (httpd.conf) I can achieve this by:

SetEnvif Remote_Addr [regex] dontlog

CustomLog logs/access_log combined env=!dontlog

How do I achieve the same in Tomcat?

Thanks!

Jason


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View this message in context: 
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Sent from the Tomcat - User mailing list archive at Nabble.com.


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Re: [Http]ServletResponseWrapper.getOutputStream()

2008-11-19 Thread Michael Ludwig

Hi Christopher,

thanks for a long and detailed response.

Christopher Schultz schrieb am 18.11.2008 um 16:26:23 (-0500):
 Michael Ludwig wrote:

  I thought it helpful to have a trace of the methods getting called

 One way to do it is to use a proxy object. If you haven't used proxies
 before, basically Java allows you to create a magic object at runtime

That's an interesting technique. I've written a small standalone test
program to understand it, and it works nicely. I'm going to give this a
try in the Tomcat context and report back.

 So, when this code is called from an include call to the request
 dispatcher, it doesn't appear in your filter's captured output? Or, it
 doesn't appear in the final response sent to the browser (or both)?

Both.

  PrintWriter out = res.getWriter(); // include doesn't appear in output
  // ServletOutputStream out = res.getOutputStream(); // works
  [...]
  out.close();
 
 You might want to flush() before close() but that shouldn't matter too
 much.

Closing the stream would flush it, wouldn't it?

 String s = !-- Huhu -- + wrapper.toString();
 ( (HttpServletResponse) res).setHeader(
   Zeichen, Integer.toString( s.length()));
 
 Note that this may not be correct: other filters could be adding
 content, and Content-Length is in bytes, not characters. If you are
 using anything other than ASCII, then this will not be correct.

Very true.

  [filter code]

 Note that there's nothing specific to HTTP at this point (except for
 the headers), so you might want to consider making this a bit more
 generic -- so you can capture the output of /any/ response, not just
 HTTP responses.

I'll try and take this into consideration.

 You could even add a method to your wrapper that will tell you which
 style of output is being used on the response: output stream versus
 writer. Then, you could avoid the try/catch which will make your code
 run a bit faster. Faster filters are always better than slow ones ;)

Try/catch can't be that much of a problem, can it? Isn't it just a fancy
way of conditional branching with information attached? As a language
feature, I assume it doesn't entail a performance hit?

  public class HttpResponseCatcher extends HttpServletResponseWrapper {
  
   [...]
  
   public ServletOutputStream getOutputStream() throws IOException {
[...]
this.getResponse().getOutputStream();
return new CapturedServletOutputStream( this.buffer);
   }
 
 You might not want to call this.getResponse().getOutputStream(). There's
 no need to do it, actually.

If everything worked, all output would be written to my unified buffer.
But it doesn't. I'm calling this method so the real object registers the
call and on subsequent calls to getWriter() an exception is triggered,
which is then caught to invoke getOutputStream(). Or vice versa.

So this is basically for debugging purposes.

   public PrintWriter getWriter() throws IOException {
[...]
return new PrintWriter(
  new OutputStreamWriter(
   new CapturedServletOutputStream( this.buffer)));
   }
 
 You might actually want to use a single CapturedServletOutputStream or
 OutputStreamWriter for all calls, rather than constructing a new one
 each time. Otherwise, you might get strange behavior and weird output
 ordering.

Sounds reasonable.

   // http://marc.info/?l=tomcat-userm=109913615025298
   public void flushBuffer() throws IOException {
this.buffer.flush();
   }
 
 Flushing a ByteArrayOutputStream doesn't do anything. What you really
 want to do is flush all the OutputStream and Writer objects you've
 created when calls to getOutputStream and getWriter come in.

Okay.

   public String toString() { return this.buffer.toString(); }
 
 Although this will work, it might be surprising to users of your class.
 I would like a method such as getCapturedOutput instead.

True, that's much better.

  public class CapturedServletOutputStream extends ServletOutputStream {
  
   ByteArrayOutputStream buffer; // Puffern, was geschrieben wird.
 
 I would base this on an OutputStream, not a ByteArrayOutputStream
 specifically. This will make your class more generic and more useful.

Better style, at least.

   public void write( byte[] b) throws IOException {
new Throwable().printStackTrace();
this.buffer.write( b);
   }
 
 Do you get stack traces printing from this method?

No.

   public void write( byte[] b, int off, int len) throws IOException {
new Throwable().printStackTrace();
this.buffer.write( b, off, len);
   }
 
 How about this one?

Yes.

 If your intent is to capture a copy of the outgoing response, perhaps
 some of this work has already been done for you. Check out Jakarta
 commons-io's TeeOutputStream, which allows you to split an OutputStream
 into two OutputStreams. I think this would save you some code writing
 for yourself. Then again, having to subclass ServletOutputStream would
 basically mean duplicating TeeOutputStream in the first place. Hmm. Just
 a

RE: [Http]ServletResponseWrapper.getOutputStream()