[jira] [Created] (FLINK-11889) Remove "stop" signal along with Stoppable interfaces

[Shang Yuanchun (Jira)]

Aljoscha Krettek created FLINK-11889:
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             Summary: Remove "stop" signal along with Stoppable interfaces
                 Key: FLINK-11889
                 URL: https://issues.apache.org/jira/browse/FLINK-11889
             Project: Flink
          Issue Type: Improvement
          Components: API / DataStream
            Reporter: Aljoscha Krettek
             Fix For: 1.9.0


During the discussion of [FLIP-34|https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=103090212] we realised that it would be beneficial for this new feature to replace the existing "stop" functionality. The current "stop" functionality cannot be used because no real-world sources support the functionality. Therefore, I think it is save to remove because it should not break existing workflows.

The issue proposes completely removing the old stop feature, introduced via FLINK-2111, as preparation for [FLIP-34|https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=103090212].

We have to be careful when doing this because it touches quite a few things. Basically, we have to do a manual revert of this commit: https://github.com/apache/flink/commit/bdd4024e20fdfb0accb6121a68780ce3a0c218c0



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