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From "Carsten Ziegeler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FELIX-4663) Potential memory leak in AsyncDeliveryTask
Date Sat, 04 Oct 2014 15:27:33 GMT

    [ https://issues.apache.org/jira/browse/FELIX-4663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159174#comment-14159174
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Carsten Ziegeler commented on FELIX-4663:
-----------------------------------------

I've added some code in rev 1629402 which should handle the case for the RejectedExecutionException.
Not sure though if we should just catch REE or all exceptions (like it is now)

> Potential memory leak in AsyncDeliveryTask
> ------------------------------------------
>
>                 Key: FELIX-4663
>                 URL: https://issues.apache.org/jira/browse/FELIX-4663
>             Project: Felix
>          Issue Type: Bug
>          Components: Event Admin
>    Affects Versions: eventadmin-1.3.2
>            Reporter: Hartmut Lang
>            Assignee: Carsten Ziegeler
>             Fix For: eventadmin-1.4.4
>
>
> EventAdmin 1.3.2 can create an OutOfMemory condition caused by not delivered async events.
> The problem can occur if an interrupted thread issues an async event (e.g. log-event).
> In EventAdmin 1.3.2 the async-delivery uses DefaultThreadPool based on PooledExecutor.

> If the already interrupted thread enters the execute-method in PooledExecutor an InterruptedException
is thrown before the TaskExecutor was added to the Thread-Pool.
> This Exception is catched(not handled, only logged) in the DefaultThreadPool.
> As a result the TaskExecuter was not scheduled in the ThreadPool but is still part of
the m_running_threads.
> All new events are added to the pool of the TaskExecuter, adding in a increasing LinkedList.
The TaskExecutor is never started again. Memory is leaking.
> Seems that 1.4.x is not vulnerable related to interrupted threads. But the same catch-and-not-handle
block is used in 1.4.x. 



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