Casey,

No problem. Good luck, and let us know when you figure out what the problem is. I know how annoying these problems can be -- I was once at a company where this problem sneaked passed QA, and those were some stressful days :-).

Kito D. Mann
Author, JSF in Action
JSF FAQ: http://www.jsfcentral.com

At 03:50 PM 9/17/2003 -0400, Casey Forbes wrote:
Hi Kito,

Thank you. This is worth looking at (plus the link looks
interesting).  I've got a lot of classes that from JSP compilation.
I also have lots and lots of sun.reflect.GeneratedMethodAccessorXXXX
classes (from Digester and PropertyUtils I guess) and lots of
_xsl._ caucho_0anonymous__xsl classes from Resin's XSLT
engine.

I'm also looking at Daniel's suggestion about hitting
the open files limit (which I can easily increase if it
turns out to be the cause)

Casey




On Wed, 17 Sep 2003, Kito D. Mann said:


> Casey,
>
> If you're using JSP, and you have a large number of pages running in a
> single VM, you may be filling up the "permanent generation" area of the
> VM's memory. This is a fixed amount of memory dedicated to classes,
> methods, and so on (reflective data). Since JSPs are compiled into classes,
> it's actually possible to fill up this area of memory and consequently get
> an OutOfMemoryError. You can, of course, increase the size -- see
> http://java.sun.com/docs/hotspot/gc1.4.2/ for details.
>
> How many JSPs does At 08:21 AM 9/17/2003 -0400, you wrote:
> >Hi everyone,
> >
> >There are many smart people on this list and I haven't been
> >able to get anywhere with this problem, so...
> >
> >I'm running 12 Struts-based apps under Resin 2 on a Linux box.
> >(I don't believe that this is a Struts problem - this is
> >just some background for you)
> >
> >Every few days (sometimes this will happen after 2 days, sometimes
> >5 or 6) I get an OutOfMemory error which stops the JVM...
> >I have plenty of room in the heap (the machine has 1 GB or
> >RAM and I have the max heap size -Xmx set to 896 MB) Just before
> >it dies there are a few attempts to free more memory.
> > >From the GC log:
> >
> >Full GC 227765K->132728K(274140K), 3.2615930 secs
> >Full GC 132729K->132728K(274140K), 2.5218730 secs
> >Full GC 132803K->120231K(274140K), 3.1998370 secs
> >OutOfMemoryError
> >
> >As you can see - I'm only using 132 MB after the first
> >GC which leaves plenty.... Runtime.freeMemory()
> >etc. returns similar results..
> >
> >Does anybody have any ideas? I don't even know where to look
> >next... It doesn't look like a profiler would help me here
> >since I don't have tons of objects filling up my memory.....
> >
> >Thanks,
> >Casey
>
> Kito D. Mann
> Author, JSF in Action
> JSF FAQ: http://www.jsfcentral.com
>
>
>
>
>

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