Vladislav Pernin created FLINK-6001:
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Summary: 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.
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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