[Hibernate-issues] [Hibernate-JIRA] Commented: (HB-327) memory leak

[<leg...@at...>]

The following comment has been added to this issue:

     Author: Bostjan Dolenc
    Created: Mon, 2 Feb 2004 8:01 AM
       Body:
I am sure class garbage collection is enabled. 

I submitted this issue to WebLogic support and we couldn't reach any definite conclusions. Part of the problem was that I couldn't make a (100% reproducible) test case using Hibernate. The test case that was "deterministic" enough was traced to RMI garbage collector. It fires up every 4 minutes, so frequest application redeploys (which are often during development) can produce quite large peak memory usages. 

Anyway, with 2.1 final (and some cache size changes in our app) we are not getting OutOfMemoryException anymore...
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Here is an overview of the issue:
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        Key: HB-327
    Summary: memory leak
       Type: Bug

     Status: Closed
   Priority: Critical
 Resolution: WON'T FIX

 Original Estimate: Unknown
 Time Spent: Unknown
  Remaining: Unknown

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.1 beta 3

   Assignee: 
   Reporter: Bostjan Dolenc

    Created: Fri, 12 Sep 2003 10:42 AM
    Updated: Mon, 2 Feb 2004 8:01 AM
Environment: Oracle 9i, WebLogic 8.1 SP1, JDK 1.4.2_01 (also on JDK 1.4.1_03)

Description:
Symptoms:
Deploy and undeploy the application about 10 times under WL 8.1 with -Xmx512m. I get OutOfMemoryException on the deploy.

I ran OptimizeIt Profiler over the app. server. It seems that Hibernate caches which contain instrumented classes are not released.

Application:
J2EE application, consisting of few SLSBs and uses Hibernate to access the database. Hibernate startup/shutdown is managed by WebLogic's ApplicationLifecycleListner. That's a listener which receives events on application startup and shutdown. I first thought that the issue was with the classloader. We used to initialize Hibernate inside WebLogic's classloader, but I get OutOfMemoryException even when using classloader of our application.


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