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From "Stephen Colebourne (JIRA)" <j...@apache.org>
Subject [jira] Commented: (IO-99) FileCleaner thread never ends and cause memory leak in AS
Date Sun, 03 Dec 2006 20:35:23 GMT
    [ http://issues.apache.org/jira/browse/IO-99?page=comments#action_12455206 ] 
            
Stephen Colebourne commented on IO-99:
--------------------------------------

The simple solution is to add a method exitWhenFinished() that sets a boolean flag.

The reaper thread then checks the boolean flag to see if it should stop the thread (once all
tracked objects have been dealt with)

{code}
if (exitWhenFinished && trackers.isEmpty()) {
  return;  // terminate thread
}
{/code}

Code can then call FileCleaner.exitWhenFinished() from their servlet destroy method.


> FileCleaner thread never ends and cause memory leak in AS
> ---------------------------------------------------------
>
>                 Key: IO-99
>                 URL: http://issues.apache.org/jira/browse/IO-99
>             Project: Commons IO
>          Issue Type: Bug
>    Affects Versions: 1.2
>         Environment: JBOssPortal with commons.fileupload
>            Reporter: Vera Mickaƫl
>            Priority: Critical
>
> FileCleaner opens a thread and no solution is given to the user to end it. So when an
application is undeployed
> in an Application Server, a thread is still alive. The WebApp can't be undeployed and
this results in a classloader
> leak that will cause an OutOfMemoryError.
> I think the API should be extended so that a user can end the thread. A better way would
be to provide a class that
> cleans everything for commons IO.

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