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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2111) Add "stop" signal to cleanly shutdown streaming jobs
Date Wed, 26 Aug 2015 14:22:46 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14713505#comment-14713505
] 

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

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/750#discussion_r37987315
  
    --- Diff: flink-clients/src/main/java/org/apache/flink/client/CliFrontend.java ---
    @@ -586,6 +653,12 @@ protected int cancel(String[] args) {
     
     			try {
     				Await.result(response, askTimeout);
    +				
    +				Object rc = response.value().get().get();
    --- End diff --
    
    `Await.result` already returns the future value.


> Add "stop" signal to cleanly shutdown 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 "stop" signal, will only affect streaming source tasks such that the
sources can stop emitting data and shutdown cleanly, resulting in a clean shutdown of the
whole streaming job.
> This feature is a pre-requirment for https://issues.apache.org/jira/browse/FLINK-1929



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