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https://issues.apache.org/jira/browse/FLINK-2111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14713582#comment-14713582
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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_r37991061
--- Diff:
flink-contrib/flink-storm-compatibility/flink-storm-compatibility-examples/src/main/java/org/apache/flink/stormcompatibility/wordcount/StormWordCountLocal.java
---
@@ -67,8 +67,10 @@ public static void main(final String[] args) throws
Exception {
Utils.sleep(10 * 1000);
- // TODO kill does no do anything so far
cluster.killTopology(topologyId);
+ // killing sends STOP signal, takes some time to clean up
+ Utils.sleep(1000);
--- End diff --
Unfortunately, we need to delay a little bit... I am not a fan of it
either. However, I rebase this PR multiple times and it was never an issue on
Travis (according test stability). If you don't have strong objection against
it, I would leave it. (The main cause of the problem comes from Storm behavior
we mimic here. `killTopology(...)` does not block in Storm, so we do not block
here either.)
> 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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