[jira] [Resolved] (FLINK-12736) ResourceManager may release TM with allocated slots

["Till Rohrmann (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-12736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann resolved FLINK-12736.
-----------------------------------
    Resolution: Fixed

Fixed via
1.9.0: 5c762cec46
1.8.2: 48f5c78177abb322ba6a7d60f375973f22831146
1.7.3: 9069f4dd82df715bf50a2bc45b968283c161f98b

> 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: 50m
>  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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