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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1021) IllegalStateException at InputGate
Date Thu, 10 Jul 2014 17:22:04 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14057697#comment-14057697

Stephan Ewen commented on FLINK-1021:

I think [~uce] ist most familiar with that part of the code.

Ufuk, can you take a look at this soon?

> IllegalStateException at InputGate
> ----------------------------------
>                 Key: FLINK-1021
>                 URL: https://issues.apache.org/jira/browse/FLINK-1021
>             Project: Flink
>          Issue Type: Bug
>          Components: Local Runtime
>    Affects Versions: 0.6-incubating
>         Environment: Linux/Windows
>            Reporter: Gyula Fora
> Until now, after every emit to the outputs we flushed them using the .flush() method
of the recordwriter. Now we removed this flush() call and we have two interesting observations:
> First of all we dont send enough records the source finishes but the output buffer never
gets flushed.
> Secondly if we generate a simple datastream from lets say the first 1500 numbers we get
an exception in the InputGates (after lets say a hundred records): java.lang.IllegalStateException:
Channel received an event before completing the current partial record.
> java.lang.IllegalStateException: Channel received an event before completing the current
partial record.
> 	at eu.stratosphere.runtime.io.channels.InputChannel.readRecord(InputChannel.java:177)
> 	at eu.stratosphere.runtime.io.gates.InputGate.readRecord(InputGate.java:173)
> 	at eu.stratosphere.streaming.api.streamcomponent.StreamRecordReader.hasNext(StreamRecordReader.java:96)
> 	at eu.stratosphere.streaming.api.streamcomponent.AbstractStreamComponent.invokeRecords(AbstractStreamComponent.java:255)
> 	at eu.stratosphere.streaming.api.streamcomponent.StreamSink.invoke(StreamSink.java:74)
> 	at eu.stratosphere.nephele.execution.RuntimeEnvironment.run(RuntimeEnvironment.java:260)
> 	at java.lang.Thread.run(Unknown Source)
> To produce the error run this test: https://github.com/stratosphere/stratosphere-streaming/blob/output-flush/stratosphere-streaming-core/src/test/java/eu/stratosphere/streaming/api/PrintTest.java
> Please note that this is the output-flush branch in Stratoshpere-streaming
> This works perfectly if we flush the outputs after the emits.

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