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Re: [aspectj-dev] -XX MaxPermSize issue seen with ant: more data...

Ron ... (you probably can't do this due to all the bugs fixed in
1.5.1a...) is it possible to try your build setup with AspectJ 1.5.0 ?
Does the problem occur?  I'm interested in seeing whether it is a new
problem introduced recently, or a problem that has always been there
but we always used to run out of normal heap space before we ran out
of permgen?

Andy.

On 26/04/06, Ron Bodkin <rbodkin@xxxxxxxxxxxxxx> wrote:
> We just ran into an interesting case that indicates that the AspectJ
> compiler is also somehow implicated in the perm gen space out of memory
> issue. We have an ant build that invokes iajc many times to weave jar files.
> We found that it ran out of memory if we didn't fork iajc. We tried setting
> -Xmx1024m with our ANT_OPTS and still got the out of memory error. However,
> I found that by using set ANT_OPTS=-Xmx256m -XX:MaxPermSize=128m it works.
> So in this case I'm very confident that it is the AspectJ weaver that is
> exhausting the permanent generation space. This is with a build of AspectJ
> that is based on HEAD right after 1.5.1a with a patch for a single bug
> report (https://bugs.eclipse.org/bugs/show_bug.cgi?id=136665).
>
>
>
> Even better, this might help us diagnose the cause of this problem. I set it
> up to add the option X="set:activateLightweightDelegates=false" to ant.(*)
> However, the same error occurrs, thus raising doubt that the problem is
> caused by the new asm delegates, at least in this case.
>
>
>
> I tried using the YourKit Java profiler but unfortunately it doesn't see the
> permgen memory use. It does show a steadily increasing amount of non heap
> memory for the ant task from about 40 MB initially up to 74 MB when the
> application dies. It also shows on system that there were 12,712 class
> objects, which retained 12.2 million bytes, almost all of the memory. That
> doesn't prove anything of course.
>
>
>
> I found this article
> http://wiki.caucho.com/Java.lang.OutOfMemoryError:_PermGen_space that talks
> about a relevant JVM bug that might have an impact here. Of course another
> possibility is that there's a reference to the classes that should have been
> GC'd...
>
>
>
> Any other ideas how to narrow this down from this reproducible version of
> the bug?
>
>
>
> Ron
>
>
>
> (*) I discovered that the AjcTask doesn't support this, but after I created
> a patch <https://bugs.eclipse.org/bugs/show_bug.cgi?id=138540>  to enable
> -Xset: options for ant, I saw a message
>
> info [activateLightweightDelegates=false] Disabling optimization to use
> lightweight delegates for non-woven types, so I know this worked.
>
>
>
>
>
>
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>
>
>


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