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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