[jira] [Commented] (FLINK-9047) SlotPool can fail to release slots

["Sihua Zhou (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-9047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408249#comment-16408249 ] 

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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