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https://issues.apache.org/jira/browse/FLINK-9047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408249#comment-16408249
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Sihua Zhou commented on FLINK-9047:
-----------------------------------
Hi [~till.rohrmann] have you already work on this? Or I'd like to take this
ticket.
> SlotPool can fail to release slots
> ----------------------------------
>
> Key: FLINK-9047
> URL: https://issues.apache.org/jira/browse/FLINK-9047
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination
> Affects Versions: 1.5.0
> Reporter: Till Rohrmann
> Priority: Blocker
> Labels: flip-6
> Fix For: 1.5.0
>
>
> The {{SlotPool}} releases idling slots. If the release operation fails (e.g.
> timeout), then it simply continues using the slot. This is problematic if the
> owning {{TaskExecutor}} failed before and was unregistered in the meantime
> from the {{SlotPool}}. As a result, the {{SlotPool}} will reuse the slot and
> whenever it tries to return because it is idling it will fail again. This,
> effectively, renders the scheduling of a job impossible.
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