[jira] [Created] (FLINK-8789) StoppableFunctions sometimes not detected

[Shang Yuanchun (Jira)]

Chesnay Schepler created FLINK-8789:
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             Summary: StoppableFunctions sometimes not detected
                 Key: FLINK-8789
                 URL: https://issues.apache.org/jira/browse/FLINK-8789
             Project: Flink
          Issue Type: Bug
          Components: Streaming
    Affects Versions: 1.5.0
            Reporter: Chesnay Schepler


While porting the {{TimestampITCase}} i got a strange exception in the logs when running {{testWatermarkPropagationNoFinalWatermarkOnStop}}:
{code:java}
Caused by: java.lang.UnsupportedOperationException: Stopping not supported by task Source: Custom Source (1/1) (87f44b422280be896bdf44766ebeb53e).
    at org.apache.flink.runtime.taskmanager.Task.stopExecution(Task.java:965)
    at org.apache.flink.runtime.taskexecutor.TaskExecutor.stopTask(TaskExecutor.java:549)
    ... 18 more{code}
 This source however implements the {{StoppableFunction}} interface.

This happens also against a legacy cluster.



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