[jira] [Created] (MESOS-1477) Deadlock when terminating ZooKeeperProcess

["Vinod Kone (JIRA)" <ji...@apache.org>]

Vinod Kone created MESOS-1477:
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             Summary: Deadlock when terminating ZooKeeperProcess
                 Key: MESOS-1477
                 URL: https://issues.apache.org/jira/browse/MESOS-1477
             Project: Mesos
          Issue Type: Bug
            Reporter: Vinod Kone
            Assignee: Vinod Kone


(1) ZooKeeper callback in progress, calls ZooKeeperProcess::event.
(2) ZooKeeperProcess::event calls ProcessWatcher::process.
(3) ProcessWatcher::process calls zk->getSessionId().
(4) This dispatches onto ZooKeeperProcess and blocks.

If in between (1) and (4) there is a termination of the ZooKeeperProcess then (4) will block forever because the dispatch event will be dropped. This means that the zookeeper thread is blocked and zookeeper_close could block forever!

This was introduced when the session id was added to all the dispatches inside WatcherProcess.




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