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https://issues.apache.org/jira/browse/FLINK-2111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14718393#comment-14718393
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ASF GitHub Bot commented on FLINK-2111:
---------------------------------------

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

    https://github.com/apache/flink/pull/750#discussion_r38192065
  
    --- Diff: 
flink-clients/src/test/java/org/apache/flink/client/RemoteExecutorHostnameResolutionTest.java
 ---
    @@ -88,15 +65,14 @@ private static void checkPreconditions() {
                // the test can only work if the invalid URL cannot be resolves
                // some internet providers resolve unresolvable URLs to 
navigational aid servers,
                // voiding this test.
    -           boolean throwsException;
                try {
                        //noinspection ResultOfMethodCallIgnored
                        InetAddress.getByName(nonExistingHostname);
    -                   throwsException = false;
                }
                catch (UnknownHostException e) {
    -                   throwsException = true;
    +                   return;
                }
    -           assumeTrue(throwsException);
    +
    +           fail("Expected UnknownHostException but none was thrown.");
    --- End diff --
    
    Matter of taste. I change it. I don't care.


> 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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