Yufei Gu created MAPREDUCE-6858:
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Summary: HistoryFileManager thrashing due to high volume jobs
Key: MAPREDUCE-6858
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6858
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: jobhistoryserver
Reporter: Yufei Gu
- JHS scans "done_intermediate" dir for files to process and adds them to a
thread pool
- Thread pool starts processing these files to move them to "done" dir
JHS scans "done_intermediate" again for files to process and adds them to a
thread pool
-- If we have enough jobs where the thread pool can't keep up with the scanning
interval, they'll get added twice (or more). If this keeps compounding, I
wouldn't be surprised if jobs end up piling up and not getting processed for
quite some time and getting lots of FileNotFoundException's.
By default, it looks like the thread pool only has 3 threads in it
(mapreduce.jobhistory.move.thread-count). And the scan interval is 3 minutes
(mapreduce.jobhistory.move.interval-ms). Perhaps we should increase these?
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