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From "jontro (JIRA)" <j...@apache.org>
Subject [jira] Created: (VFS-309) ThreadLocal memory leak in DefaultFileContent
Date Fri, 21 May 2010 12:10:18 GMT
ThreadLocal memory leak in DefaultFileContent
---------------------------------------------

                 Key: VFS-309
                 URL: https://issues.apache.org/jira/browse/VFS-309
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: 2.0
         Environment: Tomcat servlet container
            Reporter: jontro


When using commons vfs in a servlet container the ThreadLocal values stored will not be release
once the request finishes.

There needs to be a method to clear these values otherwise the data will leak into the next
request.

This was detected with tomcat 2.0.26. Upon undeploying an app that uses commons vfs tomcat
detects the leaks with a huge amount of the following messages:
A web application created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@52fb241d])
and a value of type [org.apache.commons.vfs.provider.FileContentThreadData] (value [org.apache.commons.vfs.provider.FileContentThreadData@6600167a])
but failed to remove it when the web application was stopped. To prevent a memory leak, the
ThreadLocal has been forcibly removed.

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