Till Rohrmann created FLINK-9457:
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Summary: Cancel container requests when cancelling pending slot
allocations
Key: FLINK-9457
URL: https://issues.apache.org/jira/browse/FLINK-9457
Project: Flink
Issue Type: Improvement
Components: ResourceManager, YARN
Affects Versions: 1.5.0
Reporter: Till Rohrmann
Fix For: 1.6.0, 1.5.1
When cancelling a pending slot allocation request on the {{ResourceManager}},
then we should also check whether we still need all the requested containers.
If it turns out that we no longer need them, then we should try to cancel the
unnecessary container requests. That way Flink will be, for example, a better
Yarn citizen which quickly releases resources and resource requests if no
longer needed.
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