haruhiko nishi created OGNL-228:
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Summary: Does ognl.OgnlRuntime is some root cause of PermGen
OutOfMemoryError problem?
Key: OGNL-228
URL: https://issues.apache.org/jira/browse/OGNL-228
Project: Commons OGNL
Issue Type: Bug
Environment: RHEL 6 x64
Reporter: haruhiko nishi
Priority: Critical
While analyzing several heap dumps using Yourkit, we have observed many
instances of DelegatingClassLoader created through reflections, or more
precisely sun.reflect.GeneratedMethodAccessorXXX, where XXX represents some
sequential numbers, by frameworks used for our web application.
GeneratedMethodAccessorXXX is allegedly used for some sort of reflection
optimization mechanism according to the url at
http://www-01.ibm.com/support/docview.wss?uid=swg21566549.
Because this is what seems to be eating up our memory allocated for PermGen, as
the number of the DelegatingClassLoader is gradually increased and JVM crushes
with OutOfMemoryError,
we scrutinized what is possibly blocking these DelegatingClassLoaders to be
garbage collected and found many of them are relevant to
_methodParameterTypesCache of ognl.OgnlRuntime.
Is there any known problems regarding this issue?
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