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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