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https://issues.apache.org/jira/browse/ZOOKEEPER-2687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864317#comment-15864317
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ASF GitHub Bot commented on ZOOKEEPER-2687:
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Github user arshadmohammad commented on the issue:
https://github.com/apache/zookeeper/pull/176
There is not test case, as the change is very simple and understandable and
the test will complicate the overall fix.
> 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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