[armedbear-devel] Ugh! java.lang.OutOfMemoryError: PermGen space
evenson at panix.com
Sat Sep 26 12:40:58 UTC 2009
On 9/24/09 9:21 PM, Alessio Stalla wrote:
> (dotimes (i 100000) (compile 'f (lambda () 42)))
> abcl dies with java.lang.OutOfMemoryError: PermGen space
> if I use nil instead of f it doesn't die. Also with nil is noticeably faster.
> Adding (when (= 999 (mod i 1000)) (room)) in the loop shows that gc is
> performed and memory is reclaimed, but apparently there's a leak
Note that 'PermGen' space is different then running out of heap space.
Among other things, 'PermGen' holds class metadata for every loaded
class. Since we are compiling 10^6 new classes here (and they really
are different at a JVM level) what I think is happening is that we
eventually exhaust the available space.
I've been able to reproduce your error running under the NetBeans 6.7
profiler, but I am unable to exactly confirm this hypothesis as I don't
think it has access to information on the PermGen space (or at least I
haven't found out how to access it).
Creating a 'build.properties' with
(all on one line) should should allow garbage collection of the class
instances, but it still crashes the OS X JDK6, so I don't I am
necessarily on the right track here.
"A screaming comes across the sky. It has happened before, but there
is nothing to compare to it now."
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