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Each time Hibernate is re-inited, ~30mb heap are gone

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Linuxhippy

Post subject: Each time Hibernate is re-inited, ~30mb heap are gone

Posted: Fri Apr 15, 2011 3:10 pm

Beginner

Joined: Tue Jul 03, 2007 8:47 am
Posts: 46

Hi,

We've developed an Applet using Hibernate which works quite well.

One huge problem however is, each time the applet is re-loaded (and therefor the hibernate is re-initialized) about +30mb of heap are gone.
Users using the default heap-size of 96mb can therefor reload the applet only twice before they encounter OOM.

With -Xmx256M the following loop runs 9 times, before hitting an OOM:

Code:

   for(int i=0; i < 100; i++) {
      new AnnotationConfiguration().configure().buildSessionFactory();
   }

Any idea where those references which keep the old hibernate objects alive could come from? I already tried to inspect the object graph but wasn't very successful.

I was using hibernate-3.5.6.

Thank you in advance, Clemens

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Linuxhippy

Post subject: Re: Each time Hibernate is re-inited, ~30mb heap are gone

Posted: Fri Apr 15, 2011 3:19 pm