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From "Vladislav Pernin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-6001) NPE on TumblingEventTimeWindows with ContinuousEventTimeTrigger and allowedLateness
Date Tue, 14 Mar 2017 17:23:42 GMT

    [ https://issues.apache.org/jira/browse/FLINK-6001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924615#comment-15924615
] 

Vladislav Pernin commented on FLINK-6001:
-----------------------------------------

Maybe related to FLINK-5713 ? I have to test.

> NPE on TumblingEventTimeWindows with ContinuousEventTimeTrigger and allowedLateness
> -----------------------------------------------------------------------------------
>
>                 Key: FLINK-6001
>                 URL: https://issues.apache.org/jira/browse/FLINK-6001
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API, Streaming
>    Affects Versions: 1.2.0
>            Reporter: Vladislav Pernin
>            Priority: Critical
>
> I try to isolate the problem in a small and simple reproducer by extracting the data
from my real setup.
> I fails with NPE at :
> {noformat}
> java.lang.NullPointerException: null
> 	at org.apache.flink.streaming.api.windowing.triggers.ContinuousEventTimeTrigger.onEventTime(ContinuousEventTimeTrigger.java:81)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:721)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.onEventTime(WindowOperator.java:425)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.api.operators.HeapInternalTimerService.advanceWatermark(HeapInternalTimerService.java:276)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:858)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:168)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272) ~[flink-streaming-java_2.11-1.2.0.jar:1.2.0]
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655) ~[flink-runtime_2.11-1.2.0.jar:1.2.0]
> 	at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_121]
> {noformat}
> It fails only with the Thread.sleep. If you uncomment it, it won't fail.
> So, you may have to increase the sleep time depending of your environment.
> I know this is not a very rigourous test, but this is the only way I've found to reproduce
it.
> You can find the reproducer here :
> https://github.com/vpernin/flink-window-npe



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