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From "Christofer Dutz" <>
Subject AW: OutOfMemoryError
Date Mon, 10 Jul 2006 07:50:27 GMT
Hi Oleg,


we encountered similar problems and fortunately found our that these
problems were VM related. I assume you are using a standard Sun JDK
installation (This was the case with our system). When looking at the VM
memory consumption, we could see an increasing memory consumption. Whenever
we manually triggered a “big garbage-collection” most of this was freed
again. The problem is that the default Garbage Collection Settings seem to
have problems with circular references. Memory, which is not accessible, is
not freed because of this. We could have solved this by tweaking the GC
settings of the VM, but we got rid of the problems by using the BEA Jrockit
VM instead (I knew this would work and I didn’t want to dig into all the
switches an leavers of the sun GC) 


Hope this helps.





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Von: Oleg Konovalov [] 
Gesendet: Freitag, 7. Juli 2006 16:07
An: cocoon list
Betreff: OutOfMemoryError



We are getting OutOfMemoryError 
16:26:41,011 ERROR [STDERR] java.lang.OutOfMemoryError
in our production server (which has 4GB of RAM, javaVM - max 2GB)
every other day. All applications stop responding.
We have a bunch of Cocoon applications [mostly 2.0.4] running on JBoss3.0.7.
It is totally unclear which application is causing the problem.

I don't remember that problem happening in our Development or Testing
(where max JavaVM=512MB), but I guess it has a much lighter load.

Is there any known memory problem with Cocoon ?

Is there a way to do memory profiling of Cocoon Apps ? Any particular tool ?
(I have done memory profiling of Java applets with JProbe years ago)

Any advice is very appreciated.

Thank you in advance,


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