[picocontainer-scm] [jira] Created: (PICO-373) Logging about memory leaks and ThreadLocals when redeploying a picocontainer-using app on Tomcat 6.0

Logging about memory leaks and ThreadLocals when redeploying a picocontainer-using app on Tomcat 6.0
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                 Key: PICO-373
                 URL: http://jira.codehaus.org/browse/PICO-373
             Project: PicoContainer
          Issue Type: Bug
          Components: PicoContainer (Java)
    Affects Versions: 1.3
         Environment: Linux (Fedora Core 12)
            Reporter: David North
            Priority: Minor
         Attachments: threadLocalBugDemo.zip

Deploy the attached sample application onto Apache Tomcat v6 (included are a pre-built WAR exported from eclipse, a context file for tomcat, and the eclipse project containing the source code).

Now re-deploy by touching the war file.

Observe the following line in the catalina.out log file:

14-Jul-2010 10:52:02 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: A web application created a ThreadLocal with key of type [org.picocontainer.defaults.ConstructorInjectionComponentAdapter$1] (value [org.picocontainer.defaults.ConstructorInjectionComponentAdapter$1@f91da9]) and a value of type [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed.

Is there some destroy/dispose/shutdown call on picocontainer that I am omitting, or is this a bug?

The following thread discusses the problem with Tomcat and ThreadLocals and makes a few suggestions for how to avoid it:
http://echo.nextapp.com/site/node/6254

I've marked this bug as minor since leaking Booleans isn't a serious memory leak, so it's really just the log spam that's upsetting.

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