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https://issues.apache.org/jira/browse/FLINK-1662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gyula Fora updated FLINK-1662:
------------------------------
Assignee: Péter Szabó
> NullFieldException is thrown when testing IterativeDataStream with tuples,
> windowing and maxBy
> ----------------------------------------------------------------------------------------------
>
> Key: FLINK-1662
> URL: https://issues.apache.org/jira/browse/FLINK-1662
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Péter Szabó
> Assignee: Péter Szabó
>
> NullFieldException is thrown when testing IterativeDataStream with tuples,
> windowing and maxBy.
> Stack Trace:
> 17:02:56,332 ERROR org.apache.flink.streaming.api.collector.StreamOutput
> - Emit failed due to: org.apache.flink.types.NullFieldException: Field 0
> is null, but expected to hold a value.
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:118)
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:30)
> at
> org.apache.flink.streaming.api.streamrecord.StreamRecordSerializer.serialize(StreamRecordSerializer.java:92)
> at
> org.apache.flink.streaming.api.streamrecord.StreamRecordSerializer.serialize(StreamRecordSerializer.java:29)
> at
> org.apache.flink.runtime.plugable.SerializationDelegate.write(SerializationDelegate.java:51)
> at
> org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer.addRecord(SpanningRecordSerializer.java:76)
> at
> org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:86)
> at
> org.apache.flink.streaming.api.collector.StreamOutput.collect(StreamOutput.java:65)
> at
> org.apache.flink.streaming.api.collector.DirectedCollectorWrapper.collect(DirectedCollectorWrapper.java:95)
> at
> org.apache.flink.streaming.api.invokable.operator.windowing.StreamDiscretizer.emitWindow(StreamDiscretizer.java:142)
> at
> org.apache.flink.streaming.api.invokable.operator.windowing.StreamDiscretizer.triggerOnFakeElement(StreamDiscretizer.java:129)
> at
> org.apache.flink.streaming.api.invokable.operator.windowing.StreamDiscretizer.processRealElement(StreamDiscretizer.java:101)
> at
> org.apache.flink.streaming.api.invokable.operator.windowing.StreamDiscretizer.invoke(StreamDiscretizer.java:75)
> at
> org.apache.flink.streaming.api.streamvertex.StreamVertex.invokeUserFunction(StreamVertex.java:85)
> at
> org.apache.flink.streaming.api.streamvertex.OutputHandler.invokeUserFunction(OutputHandler.java:229)
> at
> org.apache.flink.streaming.api.streamvertex.StreamVertex.invoke(StreamVertex.java:121)
> at
> org.apache.flink.runtime.execution.RuntimeEnvironment.run(RuntimeEnvironment.java:205)
> at java.lang.Thread.run(Thread.java:745)
> Examples can be found in commit
> https://github.com/mbalassi/flink/commit/42c7889777a0a6d558d58feeb5acb3c06b6fb7df.
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