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Posted to dev@tomcat.apache.org by bu...@apache.org on 2006/07/06 10:44:20 UTC

DO NOT REPLY [Bug 39975] New: - Classloader refence leaks in jasper-runtime when webapp has log4j and commons-logging

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           Summary: Classloader refence leaks in jasper-runtime when webapp
                    has log4j and commons-logging
           Product: Tomcat 5
           Version: 5.0.17
          Platform: All
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Jasper
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: taras.tielkes@gmail.com


When the first JSP renderd (since startup) is from a webapp that contains
commons-logging and log4j, classes from the 'jasper.runtime' package create a
memory leak.

Here's a description in more detail
1) User deploys war with commons-logging + log4j jars (quite common)
2) First page is rendered, causing loading and initialization of classes in the
'jasper.runtime' package.
3) Some of these classes (for instance PageContextImpl) contain static
commons-logging 'log' fields.
4) In the scenario described, these fields get intialized to a Log4JLogger
instance that is loaded from the webapp classloader.

The effective result is that code and data in this webapp will never be unloaded.

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DO NOT REPLY [Bug 39975] - Classloader refence leaks in jasper-runtime when webapp has log4j and commons-logging

Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39975>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=39975


yoavs@computer.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED




------- Additional Comments From yoavs@computer.org  2006-12-26 07:03 -------
I see your point.  I've removed the static Log fields in favor of non-static
ones for Jasper in Tomcat 5.5 (should be in time for the 5.5.21 release).  I
guess this still needs to be done in 5.0.

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DO NOT REPLY [Bug 39975] - Classloader refence leaks in jasper-runtime when webapp has log4j and commons-logging

Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39975>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=39975


yoavs@computer.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED




------- Additional Comments From yoavs@computer.org  2006-12-26 07:25 -------
Done for Tomcat 5.0 as well.

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