Capacity scheduler should clean up reservations if it runs tasks on nodes other
than where it has made reservations
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Key: MAPREDUCE-763
URL: https://issues.apache.org/jira/browse/MAPREDUCE-763
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/capacity-sched
Reporter: Hemanth Yamijala
Currently capacity scheduler makes a reservation on nodes for high memory jobs
that cannot currently run at the time. It could happen that in the meantime
other tasktrackers become free to run the tasks of this job. Ideally in the
next heartbeat from the reserved TTs the reservation should be removed.
Otherwise it could unnecessarily block capacity for a while (until the TT has
enough slots free to run a task of this job).
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