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https://issues.apache.org/jira/browse/FLINK-12736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Till Rohrmann updated FLINK-12736:
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Affects Version/s: 1.7.2
1.8.1
> ResourceManager may release TM with allocated slots
> ---------------------------------------------------
>
> Key: FLINK-12736
> URL: https://issues.apache.org/jira/browse/FLINK-12736
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.7.2, 1.8.1, 1.9.0
> Reporter: Chesnay Schepler
> Assignee: Andrey Zagrebin
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.7.3, 1.8.2, 1.9.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The {{ResourceManager}} looks out for TaskManagers that have not had any
> slots allocated on them for a while, as these could be released to safe
> resources. If such a TM is found the RM checks via an RPC call whether the TM
> still holds any partitions. If no partition is held then the TM is released.
> However, in the RPC callback no check is made whether the TM is actually
> _still_ idle. In the meantime a slot could've been allocated on the TM.
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