Jason Lowe created YARN-7583:
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Summary: Reduce overhead of container reacquisition
Key: YARN-7583
URL: https://issues.apache.org/jira/browse/YARN-7583
Project: Hadoop YARN
Issue Type: Improvement
Components: nodemanager
Reporter: Jason Lowe
When reacquiring containers after a nodemanager restart the Linux container
executor invokes the container executor to essentially kill -0 the process to
check if it is alive. It would be a lot cheaper on Linux to stat the
/proc/<pid> directory which the nodemanager can do directly rather than pay for
the fork-and-exec through the container executor and potential signal
permission issues.
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