[jira] [Created] (FLINK-4036) Potential deadlock in StreamIterationSink

[Shang Yuanchun (Jira)]

Ufuk Celebi created FLINK-4036:
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             Summary: Potential deadlock in StreamIterationSink
                 Key: FLINK-4036
                 URL: https://issues.apache.org/jira/browse/FLINK-4036
             Project: Flink
          Issue Type: Bug
            Reporter: Ufuk Celebi
            Assignee: Ufuk Celebi


When the stream iteration head finishes before the iteration tail acquires the feedback queue, the tail will block indefinitely.

This happened here: https://s3.amazonaws.com/archive.travis-ci.org/jobs/134215892/log.txt

You can provoke this by adding a sleep before acquiring the feedback queue in {{StreamIterationTail}} and running {{IterateTest.testSimpleIteration}}.





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