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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (ZOOKEEPER-795) eventThread isn't shutdown after a connection "session expired" event coming
Date Mon, 02 Aug 2010 20:01:16 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12894679#action_12894679

Hadoop QA commented on ZOOKEEPER-795:

+1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 980576.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Zookeeper-Patch-h7.grid.sp2.yahoo.net/101/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Zookeeper-Patch-h7.grid.sp2.yahoo.net/101/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Zookeeper-Patch-h7.grid.sp2.yahoo.net/101/console

This message is automatically generated.

> eventThread isn't shutdown after a connection "session expired" event coming
> ----------------------------------------------------------------------------
>                 Key: ZOOKEEPER-795
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-795
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: java client
>    Affects Versions: 3.3.1
>         Environment: ubuntu 10.04
>            Reporter: mathieu barcikowski
>            Priority: Blocker
>             Fix For: 3.3.2, 3.4.0
>         Attachments: ExpiredSessionThreadLeak.java, ZOOKEEPER-795.patch, ZOOKEEPER-795.patch
> Hi,
> I notice a problem with the eventThread located in ClientCnxn.java file.
> The eventThread isn't shutdown after a connection "session expired" event coming (i.e.
never receive EventOfDeath).
> When a session timeout occurs and the session is marked as expired, the connexion is
fully closed (socket, SendThread...) expect for the eventThread.
> As a result, if i create a new zookeeper object and connect through it, I got a zombi
thread which will never be kill (as for the previous zookeeper object, the state is already
close, calling close again don't do anything).
> So everytime I will create a new zookeeper connection after a expired session, I will
have a one more zombi EventThread.
> How to reproduce :
> - Start a zookeeper client connection in debug mode
> - Pause the jvm enough time to the expired event occur
> - Watch for example with jvisualvm the list of threads, the sendThread is succesfully
killed, but the EventThread go to wait state for a infinity of time
> - if you reopen a new zookeeper connection, and do again the previous steps, another
EventThread will be present in infinite wait state

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