AW: OutOfMemoryError

[Christofer Dutz]

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.   Regards,             Christofer   [ c h r i s t o f e r   d u t z ]   IT-Berater univativ GmbH & Co. KG Robert-Bosch-Str. 7, 64293 Darmstadt   fon: 0 61 51 / 66 717 - 21 fax: 0 61 51 / 66 717 - 29 email: [EMAIL PROTECTED] http://www.univativ.de   Darmstadt, Stuttgart, Karlsruhe, Düsseldorf     Von: Oleg Konovalov [mailto:[EMAIL PROTECTED] Gesendet: Freitag, 7. Juli 2006 16:07 An: cocoon list Betreff: OutOfMemoryError   Hi, 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 environment (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,  Oleg.