[jira] [Created] (FLINK-7871) SlotPool should release its unused slot to RM

[Shang Yuanchun (Jira)]

shuai.xu created FLINK-7871:
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             Summary: SlotPool should release its unused slot to RM
                 Key: FLINK-7871
                 URL: https://issues.apache.org/jira/browse/FLINK-7871
             Project: Flink
          Issue Type: Bug
            Reporter: shuai.xu


As described in design wiki https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=65147077,
_*The SlotPool releases slots that are unused to the ResourceManager. Slots count as unused if they are not used when the job is fully running (fully recovered).*_
but now, the slot pool will keep the slots once offered to it until the job finished.



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