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Posted to dev@flink.apache.org by "Roman Khachatryan (Jira)" <ji...@apache.org> on 2020/10/31 16:57:00 UTC

[jira] [Created] (FLINK-19907) Channel state (upstream) can be restored after emission of new elements (watermarks)

Roman Khachatryan created FLINK-19907:
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             Summary: Channel state (upstream) can be restored after emission of new elements (watermarks)
                 Key: FLINK-19907
                 URL: https://issues.apache.org/jira/browse/FLINK-19907
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Network
    Affects Versions: 1.11.2, 1.12.0
            Reporter: Roman Khachatryan
            Assignee: Roman Khachatryan
             Fix For: 1.12.0


In StreamTask.beforeInvoke:

operatorChain.initializeStateAndOpenOperators(createStreamTaskStateInitializer()); readRecoveredChannelState();

 

But operatorChain.initializeStateAndOpenOperators can emit watermarks (or potentially some other stream elements).

 

I've encountered this issue while adding an EndOfRecovery marker - in some runs of in OverWindowITCase.testRowTimeBoundedPartitionedRangeOver the marker was emitted after the watermark.

 

cc: [~zjwang], [~pnowojski]



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