[jira] [Comment Edited] (FLINK-5836) Race condition between slot offering and task deployment

["Biao Liu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-5836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15873399#comment-15873399 ] 

Biao Liu edited comment on FLINK-5836 at 2/19/17 1:52 AM:
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+1
I think we have encountered this problem.
If nobody is working on this, I'll take it.


was (Author: sleepy):
+1

> Race condition between slot offering and task deployment
> --------------------------------------------------------
>
>                 Key: FLINK-5836
>                 URL: https://issues.apache.org/jira/browse/FLINK-5836
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Coordination
>    Affects Versions: 1.3.0
>            Reporter: Till Rohrmann
>              Labels: flip-6
>
> The Flip-6 code has a race condition when offering slots to a {{JobManager}} which directly deploys tasks to the offered slots. In such a situation it is possible that the deploy call overtakes the acknowledge message for the slot offering. As a result, the slots are not marked yet as active and the deployment will fail.
> I propose to fix this problem by first activating all offered slots before sending the slot offer message to the {{JobManager}}. Consequently, we'll deactivate and free slots which haven't been accepted by the {{JobManager}} once we've received the offering acknowledge message.



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