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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2111) Add "terminate" signal to cleanly stop streaming jobs
Date Mon, 22 Jun 2015 17:23:02 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14596266#comment-14596266
] 

ASF GitHub Bot commented on FLINK-2111:
---------------------------------------

Github user StephanEwen commented on the pull request:

    https://github.com/apache/flink/pull/750#issuecomment-114188551
  
    I disagree with the execution graph changes. I took us 6 months to get it stable, and
we still discover corner cases. The new state interacts with all other states. Unless there
is a heavily compelling reason to change this, I am against changing it (not just here, but
as a general rule). I really do not see the necessity. But I see about two weeks of nighly
debugging sessions coming up when we touch the state machine and users report critical issues
;-)
    
    I am open for discussion concerning adding a new JobStatus, which would display the job
as "shutting down". If it did not react then, users see it and can trigger canceling.


> Add "terminate" signal to cleanly stop streaming jobs
> -----------------------------------------------------
>
>                 Key: FLINK-2111
>                 URL: https://issues.apache.org/jira/browse/FLINK-2111
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Runtime, JobManager, Local Runtime, Streaming, TaskManager,
Webfrontend
>            Reporter: Matthias J. Sax
>            Assignee: Matthias J. Sax
>            Priority: Minor
>
> Currently, streaming jobs can only be stopped using "cancel" command, what is a "hard"
stop with no clean shutdown.
> The new introduced "terminate" signal, will only affect streaming source tasks such that
the sources can stop emitting data and terminate cleanly, resulting in a clean termination
of the whole streaming job.
> This feature is a pre-requirment for https://issues.apache.org/jira/browse/FLINK-1929



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