[jira] [Created] (YARN-1398) Deadlock in capacity scheduler leaf queue and parent queue for getQueueInfo and completedConatiner call

["Sunil G (JIRA)" <ji...@apache.org>]

Sunil G created YARN-1398:
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             Summary: Deadlock in capacity scheduler leaf queue and parent queue for getQueueInfo and completedConatiner call
                 Key: YARN-1398
                 URL: https://issues.apache.org/jira/browse/YARN-1398
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.2.0
            Reporter: Sunil G
            Priority: Critical


getQueueInfo in parentQueue will call  child.getQueueInfo().
This will try acquire the leaf queue lock over parent queue lock.

Now at same time if a completedContainer call comes and acquired LeafQueue lock and it will wait for ParentQueue's completedConatiner call.

This lock usage is not in synchronous and can lead to deadlock.

With JCarder, this is showing as a potential deadlock scenario.





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