Jason Lowe created MAPREDUCE-6916:
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Summary: History server scheduling tasks at fixed rate can be
problematic when those tasks are slow
Key: MAPREDUCE-6916
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6916
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: jobhistoryserver
Affects Versions: 2.7.4
Reporter: Jason Lowe
The job history server currently schedules both the task of moving jobs from
intermediate to done and the task of cleaning jobs at a fixed rate. If those
tasks take longer than the rate period to execute then a backlog of
to-be-scheduled tasks can build up and cause a long storm of them to execute
later when the blockage clears.
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