Hello Nikita,
I only recently joined this list so I might have missed your first
message (actually I subscribed that same day).
I think what you wrote should help. If you are going to try it out,
please let us know the result.
Other than that, all I can think of to decrease heap space is to try to
move classes that are shared among different web apps to common/lib
(parent classloader) so that they are loaded only once.
Good luck!
Dies
Nikita Belov wrote:
Why are you ignoring me? Am I state my question so incomprehensible or
is my English so bad?
--
Nikita
-----Original Message-----
From: Nikita Belov [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 26, 2006 6:58 PM
To: 'Tomcat Developers List'
Subject: PermGen overflow
Hello all,
I am sorry, I need ask help here, but I already have post this issue
to 'Tomcat Users List' and was redirected to this list.
I use JBoss 4.0.3sp1 (with embedded Tomcat 5.5) and have problem
with JVM PermGen overflow. My application allows user to deploy
custom JSP pages to server. These JSP pages copied inside one
web-app without its redeploying. After several days of the system
work, classes of the compiled JSP pages overflow Java PermGen space.
It is needed to drop all references to classloader, to allow GC to
finalize classloader and free PermGen from classes loaded by it. But
Tomcat drop references to classloader only when web-application
undeployed.
To resolve this issue I have decide to replace JSP servlet (servlet
mapped to *.jsp) with my own implementation. My JSP servlet will call
JSP-compiler and load each compiled class by separate classloader
instance, which won't be references from anywhere. This will allow GC
to remove classloader and free PermGen.
I think this will help. Am I right? By the way, is there any
easier solution for described problem? All comments are welcome.
--
Nikita
PS1: I know, PermGen size can be increased with JVM option
-XX:PermSize. It helps, but it doesn't solve problem completely.
PS2: Deploying custom JSP pages by user is the primary design of my
system and can't be changed.
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