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From Jeff Turner <je...@apache.org>
Subject Memory leak? (issues.apache.org)
Date Thu, 04 May 2006 07:03:49 GMT
Hi,

For the last few months, issues.apache.org/jira has been running out of
memory about once a week. We've finally got it running in a profiler, and
are seeing most of the memory (eg. 486 of 572Mb) used up by char[]
buffers in BodyContentImpl. Here is a sample GC Root -> Object trace:

 char[16777218]
 cb of  org.apache.jasper.runtime.BodyContentImpl
 [0] of  org.apache.jasper.runtime.BodyContentImpl[7]
 outs of  org.apache.jasper.runtime.PageContextImpl
 [86] of  java.lang.Object[101]
 pool of  org.apache.jasper.util.SimplePool
 pool of  org.apache.jasper.runtime.JspFactoryImpl
 deflt of  javax.servlet.jsp.JspFactory
 [57] of  java.lang.Object[641]
 elementData of  java.util.Vector
 classes of  org.apache.catalina.loader.StandardClassLoader [Other]


There seems to be a constantly increasing number of BodyContentImpl
objects in the system:

1 May:  93 Objects (126Mb)
2 May:  107 Objects (263Mb)
3 May:  492 Objects (486MB)

(the first two were taken directly after a full gc)


It appears to be a case of this bug:

http://issues.apache.org/bugzilla/show_bug.cgi?id=37793

Perhaps this bug affects the ASF JIRA in particular (and not most people)
because people occasionally request huge (20-30Mb) pages. There are 23
BodyContentImpls between 33Mb and 10Mb in the last dump, and due to the
pooling, these all stick around taking up memory.

Could anyone comment on this issue? Remy seemed to think it was 'as
intended', and the bug is marked WONTFIX. I'm happy to provide yourkit
memory dumps or access to the server if necessary. We're currently
running 5.5.16.


Thanks!

Jeff

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