[jira] [Resolved] (FLINK-1391) Kryo fails to properly serialize avro collection types

["Robert Metzger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-1391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Metzger resolved FLINK-1391.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 0.9

Resolved for 0.9 into master with http://git-wip-us.apache.org/repos/asf/flink/commit/7e39bc67

> Kryo fails to properly serialize avro collection types
> ------------------------------------------------------
>
>                 Key: FLINK-1391
>                 URL: https://issues.apache.org/jira/browse/FLINK-1391
>             Project: Flink
>          Issue Type: Sub-task
>    Affects Versions: 0.8, 0.9
>            Reporter: Robert Metzger
>            Assignee: Robert Metzger
>             Fix For: 0.9, 0.8.1
>
>
> Before FLINK-610, Avro was the default generic serializer.
> Now, special types coming from Avro are handled by Kryo .. which seems to cause errors like:
> {code}
> Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.lang.NullPointerException
> 	at org.apache.avro.generic.GenericData$Array.add(GenericData.java:200)
> 	at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:116)
> 	at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:22)
> 	at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
> 	at org.apache.flink.api.java.typeutils.runtime.KryoSerializer.deserialize(KryoSerializer.java:143)
> 	at org.apache.flink.api.java.typeutils.runtime.KryoSerializer.deserialize(KryoSerializer.java:148)
> 	at org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:244)
> 	at org.apache.flink.runtime.plugable.DeserializationDelegate.read(DeserializationDelegate.java:56)
> 	at org.apache.flink.runtime.io.network.serialization.AdaptiveSpanningRecordDeserializer.getNextRecord(AdaptiveSpanningRecordDeserializer.java:71)
> 	at org.apache.flink.runtime.io.network.channels.InputChannel.readRecord(InputChannel.java:189)
> 	at org.apache.flink.runtime.io.network.gates.InputGate.readRecord(InputGate.java:176)
> 	at org.apache.flink.runtime.io.network.api.MutableRecordReader.next(MutableRecordReader.java:51)
> 	at org.apache.flink.runtime.operators.util.ReaderIterator.next(ReaderIterator.java:53)
> 	at org.apache.flink.runtime.operators.DataSinkTask.invoke(DataSinkTask.java:170)
> 	at org.apache.flink.runtime.execution.RuntimeEnvironment.run(RuntimeEnvironment.java:257)
> 	at java.lang.Thread.run(Thread.java:744)
> {code}



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