This is a really good one link. Make sure that you also use Hivemind
1.1.1 (previous versions suffered from the "ThreadLocal" problem
described in that URL).
You must also use Tomcat 5.5.15 or higher.
A good profiler is a key in debugging this kind of issues. YourKit on
JDK 1.6 is recommended.
Alex
Rui Pacheco wrote:
I found this on the web. The nice folks at the Spring framework
compiled a
list of possible causes and possible solutions for this problem.
http://opensource.atlassian.com/confluence/spring/pages/viewpage.action?pageId=2669
On 6/23/06, Mahmut Izci <[EMAIL PROTECTED]> wrote:
Alex Kartashev:
> This is clearly a garbage collection in action. Happened to me many
> times on Tomcat in development. You're running out of Perm space. Try
> increasing the perm size to its max (256M - I believe with
> XX:MaxPermZize=256m). It will still happen but less often (every 10
> reloads?), it is possible to get Tomcat to unload the
> WebappClassloader cleanly (I did it), but this is beyond the scope of
> one email. :-(
>
Hi Alex,
we have also problems with Tomcat and unloading the WebappClassloader.
Maybe you can give us some advice.
Sometimes Tomcat runs out of memory, if we deploy/undeploy too often or
the applications do not work properly.
Thanks
Mahmut
> Alex
>
> Rui Pacheco wrote:
>> Hi all
>>
>> I am developing a web application with Java 5, Tapestry 4.0.2,
>> Commons DBCP
>> 1.2.1, Tomcat 5.5.17 and MySQL 5.0.19.
>>
>> While I develop my application I noticed a strange behaviour: Java
usage
>> suddenly climbs up to 99.9% and never goes down.
>> The server (RHLE) is fine and responsive, but Tomcat stops responding
to
>> requests. If I deploy a new war file, he won't uncompact it, if I try
to
>> access a web page, he won't serve it, if shut it down, the process
will
>> continue running. I have to kill -9 to get rid of it.
>>
>> I believe this problem is with Tapestry because it happens on all the
>> servers I deploy the application. It happens on the development
>> server and
>> on my laptop running Ubuntu Dapper and Java 6.
>>
>> My laptop has no problem running other Java applications for as long
>> as I
>> need them, like JEdit and Aquadata Studio. The development server
>> used to
>> have a JSP based website that also worked withouth a problem, except
>> for the
>> common developer mistakes.
>>
>> Is there a way for me to diagnose whats happening? Any special flags
>> to pass
>> to the VM or some über-secret-hidden log you know about?
>
>
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