JvmManager sleeps between SIGTERM and SIGKILL while holding many TT locks
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Key: MAPREDUCE-2266
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2266
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: task-controller, tasktracker
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Priority: Blocker
Fix For: 0.22.0
Between sending a task SIGTERM and SIGKILL, the JvmManager will sleep for
sleepTimeBeforeSigKill millis. But in many call heirarchies this is done while
holding important locks like the TT lock and the JvmManagerForType lock. With
the default 5 second sleep, this prevents other tasks from getting scheduled
and reduces scheduling throughput.
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