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Posted to dev@tomcat.apache.org by bu...@apache.org on 2007/01/09 06:40:20 UTC
DO NOT REPLY [Bug 41324] New: - ApplicationFilterChain holds references to filters after request ends
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Summary: ApplicationFilterChain holds references to filters after
request ends
Product: Tomcat 5
Version: 5.5.20
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: tomcat-dev@jakarta.apache.org
ReportedBy: b_stansberry@hotmail.com
ApplicationFilterChain is holding references to filters after the request. I
believe this is because in 5.5.x, ApplicationFilterChain.release() is not
nulling out the entries in the filters array. In the 6.0.x trunk, there is a
for loop to clear these references.
I'll attach a snippet from a JBoss Profiler report from a classloader leakage
test I wrote for JBoss. This was from a JBoss build with TC 5.5.20 integrated.
It shows the classloader for an undeployed app being held by a chain leading to
the Tomcat request processor pool. In an experiment I naively altered the
Request.recycle() method to null out the ref to the filter chain and that
allowed the classloader to be gc'ed. I see now that adding the for loop to
ApplicationFilterFactory.release() is probably the correct solution.
This could be a fairly serious classloader leak if the leaked filter references
are in a high position in the array; i.e. positions that never get replaced by a
subsequent request. In that case the classloader leak would be long lasting.
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DO NOT REPLY [Bug 41324] - ApplicationFilterChain holds references to filters after request ends
Posted by bu...@apache.org.
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------- Additional Comments From bstansberry@jboss.com 2007-01-08 21:42 -------
Created an attachment (id=19378)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19378&action=view)
Profiler report showing the leak
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DO NOT REPLY [Bug 41324] - ApplicationFilterChain holds references to filters after request ends
Posted by bu...@apache.org.
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<http://issues.apache.org/bugzilla/show_bug.cgi?id=41324>.
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bstansberry@jboss.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
------- Additional Comments From bstansberry@jboss.com 2007-01-11 12:46 -------
*** This bug has been marked as a duplicate of 41034 ***
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DO NOT REPLY [Bug 41324] - ApplicationFilterChain holds references to filters after request ends
Posted by bu...@apache.org.
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<http://issues.apache.org/bugzilla/show_bug.cgi?id=41324>.
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------- Additional Comments From chris@sourcelabs.com 2007-01-11 10:51 -------
This looks like it may be a dupe of 41034?
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