TaskTracker blacklisted by one job should be blacklisted for all other jobs in
the queue
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Key: MAPREDUCE-790
URL: https://issues.apache.org/jira/browse/MAPREDUCE-790
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: jobtracker
Affects Versions: 0.20.1
Reporter: Qi Liu
Once a task tracker is blacklisted by one job, it is still being used by all
other jobs in the queue. A blacklisted task tracker could be a signal of
marginal node, and thus it should be blacklisted for all jobs at least
temporarily. Also, even if one task tracker has been blacklisted globally due
to too many failures, the blacklists of the jobs in the queue are not affected,
and thus will continue to use the bad task tracker. This could result job
failure.
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