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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 Mon, 30 Nov 2015 17:33:10 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15032133#comment-15032133
] 

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_r46174663
  
    --- Diff: flink-runtime/src/main/scala/org/apache/flink/runtime/messages/TaskControlMessages.scala
---
    @@ -59,6 +59,15 @@ object TaskMessages {
         extends TaskMessage with RequiresLeaderSessionID
     
       /**
    +   * Stops the task associated with [[attemptID]]. The result is sent back to the sender
as a
    +   * [[TaskOperationResult]] message.
    +   *
    +   * @param attemptID The task's execution attempt ID.
    +   */
    +  case class StopTask(attemptID: ExecutionAttemptID)
    +    extends TaskMessage
    --- End diff --
    
    This class should also extend `RequiresLeaderSessionID`. 


> 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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