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From "Johannes (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1531) Custom Kryo Serializer fails in itertation scenario
Date Thu, 12 Feb 2015 19:07:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14318779#comment-14318779
] 

Johannes commented on FLINK-1531:
---------------------------------

Thanks for the quick turnaround
Tried it locally and it works now - thanks

But as a general though, isn't using exceptions to signal EOF much to costly?

Quick informative write up on stack overflow:

http://stackoverflow.com/questions/299068/how-slow-are-java-exceptions

> Custom Kryo Serializer fails in itertation scenario
> ---------------------------------------------------
>
>                 Key: FLINK-1531
>                 URL: https://issues.apache.org/jira/browse/FLINK-1531
>             Project: Flink
>          Issue Type: Bug
>          Components: Iterations
>    Affects Versions: 0.9
>            Reporter: Johannes
>            Priority: Minor
>             Fix For: 0.9, 0.8.1
>
>         Attachments: TestKryoIterationSerializer.java
>
>
> When using iterations with a custom serializer for a domain object, the iteration will
fail.
> {code:java}
> org.apache.flink.runtime.client.JobExecutionException: com.esotericsoftware.kryo.KryoException:
Buffer underflow
> 	at org.apache.flink.api.java.typeutils.runtime.NoFetchingInput.require(NoFetchingInput.java:76)
> 	at com.esotericsoftware.kryo.io.Input.readVarInt(Input.java:355)
> 	at com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:109)
> 	at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:641)
> 	at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:752)
> 	at org.apache.flink.api.java.typeutils.runtime.KryoSerializer.deserialize(KryoSerializer.java:198)
> 	at org.apache.flink.api.java.typeutils.runtime.KryoSerializer.deserialize(KryoSerializer.java:203)
> 	at org.apache.flink.runtime.io.disk.InputViewIterator.next(InputViewIterator.java:43)
> 	at org.apache.flink.runtime.iterative.task.IterationHeadPactTask.streamOutFinalOutputBulk(IterationHeadPactTask.java:404)
> 	at org.apache.flink.runtime.iterative.task.IterationHeadPactTask.run(IterationHeadPactTask.java:377)
> 	at org.apache.flink.runtime.operators.RegularPactTask.invoke(RegularPactTask.java:360)
> 	at org.apache.flink.runtime.execution.RuntimeEnvironment.run(RuntimeEnvironment.java:204)
> 	at java.lang.Thread.run(Thread.java:745)
> {code}



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