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https://issues.apache.org/jira/browse/FLINK-29985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17631830#comment-17631830
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Roman Khachatryan commented on FLINK-29985:
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cc: [~mapohl] , [~pnowojski]
> TaskManager doesn't close SlotTable on SIGTERM
> ----------------------------------------------
>
> Key: FLINK-29985
> URL: https://issues.apache.org/jira/browse/FLINK-29985
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Task
> Affects Versions: 1.16.0, 1.15.3
> Reporter: Roman Khachatryan
> Priority: Major
>
> When TM is stopped by RM, its slot table is closed, causing all its slots to
> be released.
> However, when TM is stopped by SIGTERM (i.e. external resource manager), its
> slot table is NOT closed.
>
> When a slot is released, the associated resources are released as well, in
> particular, MemoryManager.
> MemoryManager might hold not only memory, but also arbitrary shared resources
> (currently, PythonSharedResources and RocksDBSharedResources).
> As of now, RocksDBSharedResources contains only ephemeral resources. Not sure
> about PythonSharedResources, but likely it is associated with a separate
> process.
> That means that in standalone clusters, some resources might not be released.
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