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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2687) Deadlock while shutting down the Leader server.
Date Mon, 13 Feb 2017 19:52:41 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864306#comment-15864306
] 

ASF GitHub Bot commented on ZOOKEEPER-2687:
-------------------------------------------

GitHub user arshadmohammad opened a pull request:

    https://github.com/apache/zookeeper/pull/176

    ZOOKEEPER-2687:Deadlock while shutting down the Leader server.

    Leader server enters into deadlock while shutting down itself. Shutdown of the leader
server is called from the synchronized block which must be called from outside the synchronized
block. For detail pls refer ZOOKEEPER-2380

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/arshadmohammad/zookeeper ZOOKEEPER-2687

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/zookeeper/pull/176.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #176
    
----
commit 1e3ed70b281e1afc9adc6a8c8ea72bef5b9c25e8
Author: Mohammad Arshad <arshad@apache.org>
Date:   2017-02-13T19:48:07Z

    ZOOKEEPER-2687:Deadlock while shutting down the Leader server.

----


> Deadlock while shutting down the Leader server.
> -----------------------------------------------
>
>                 Key: ZOOKEEPER-2687
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2687
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.5.2, 3.6.0
>            Reporter: Mohammad Arshad
>            Assignee: Mohammad Arshad
>             Fix For: 3.5.3, 3.6.0
>
>         Attachments: ZOOKEEPER-2687-01.patch
>
>
> Leader server enters into deadlock while shutting down. This happens some time only.
> The reason and deadlock flow is same as ZOOKEEPER-2380.
> shutdown was removed from synchronized block in ZOOKEEPER-2380
> Now shutdown is called from synchronized block from another place.
> {code}
> // check leader running status
> if (!this.isRunning()) {
>     shutdown("Unexpected internal error");
>     return;
> }
> {code}



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