[jira] [Created] (YARN-5154) DelayedProcessKiller can kill the wrong process if pid is recycled

["Jason Lowe (JIRA)" <ji...@apache.org>]

Jason Lowe created YARN-5154:
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             Summary: DelayedProcessKiller can kill the wrong process if pid is recycled
                 Key: YARN-5154
                 URL: https://issues.apache.org/jira/browse/YARN-5154
             Project: Hadoop YARN
          Issue Type: Bug
          Components: nodemanager
    Affects Versions: 2.6.4, 2.7.2, 2.8.0
            Reporter: Jason Lowe


YARN-4459 reduced the chance of the container-executor accidentally killing the wrong process when pids are recycled, but it can still occur.  We should improve the DelayedProcessKiller to cancel the timer if the container exits between the deliverly of the two signals and/or implement some sanity checks in the executor just before delivering the signal to try to avoid killing the wrong thing.



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