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https://issues.apache.org/jira/browse/FLINK-2697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14875858#comment-14875858
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Aljoscha Krettek commented on FLINK-2697:
-----------------------------------------
Should we keep the issue around until the new windowing stuff is in an then
mark it as fixed?
> Deadlock in StreamDiscretizer
> -----------------------------
>
> Key: FLINK-2697
> URL: https://issues.apache.org/jira/browse/FLINK-2697
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Till Rohrmann
>
> Encountered a deadlock in the {{StreamDiscretizer}}
> {code}
> Found one Java-level deadlock:
> =============================
> "Thread-11":
> waiting to lock monitor 0x00007f9d081e1ab8 (object 0x00000000ff6b4590, a
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer),
> which is held by "StreamDiscretizer -> TumblingGroupedPreReducer ->
> (Filter, ExtractParts) (3/4)"
> "StreamDiscretizer -> TumblingGroupedPreReducer -> (Filter, ExtractParts)
> (3/4)":
> waiting to lock monitor 0x00007f9d081e20e8 (object 0x00000000ff75fd88, a
> org.apache.flink.streaming.api.windowing.policy.TimeTriggerPolicy),
> which is held by "Thread-11"
> Java stack information for the threads listed above:
> ===================================================
> "Thread-11":
> at
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer.triggerOnFakeElement(StreamDiscretizer.java:121)
> - waiting to lock <0x00000000ff6b4590> (a
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer)
> at
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer$WindowingCallback.sendFakeElement(StreamDiscretizer.java:203)
> at
> org.apache.flink.streaming.api.windowing.policy.TimeTriggerPolicy.activeFakeElementEmission(TimeTriggerPolicy.java:117)
> - locked <0x00000000ff75fd88> (a
> org.apache.flink.streaming.api.windowing.policy.TimeTriggerPolicy)
> at
> org.apache.flink.streaming.api.windowing.policy.TimeTriggerPolicy$TimeCheck.run(TimeTriggerPolicy.java:144)
> at java.lang.Thread.run(Thread.java:745)
> "StreamDiscretizer -> TumblingGroupedPreReducer -> (Filter, ExtractParts)
> (3/4)":
> at
> org.apache.flink.streaming.api.windowing.policy.TimeTriggerPolicy.preNotifyTrigger(TimeTriggerPolicy.java:74)
> - waiting to lock <0x00000000ff75fd88> (a
> org.apache.flink.streaming.api.windowing.policy.TimeTriggerPolicy)
> at
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer.processRealElement(StreamDiscretizer.java:91)
> - locked <0x00000000ff6b4590> (a
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer)
> at
> org.apache.flink.streaming.api.operators.windowing.StreamDiscretizer.processElement(StreamDiscretizer.java:73)
> at
> org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:162)
> at
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:56)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:171)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:581)
> at java.lang.Thread.run(Thread.java:745)
> Found 1 deadlock.
> {code}
> https://s3.amazonaws.com/archive.travis-ci.org/jobs/80770719/log.txt
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