The task timeout check interval should be configurable independent of
mapreduce.task.timeout
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Key: MAPREDUCE-3528
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3528
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mr-am, mrv2
Affects Versions: 0.23.0
Reporter: Siddharth Seth
TaskHeartbeatHandler sleeps for 'mapreduce.task.timeout' - between each check.
If a task/NM goes bad immediately after starting a task - the timeout is
detected in ~2x the configured timeout interval.
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