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From "Robert Metzger (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-1391) Kryo fails to properly serialize avro collection types
Date Mon, 12 Jan 2015 17:39:34 GMT
Robert Metzger created FLINK-1391:
-------------------------------------

             Summary: Kryo fails to properly serialize avro collection types
                 Key: FLINK-1391
                 URL: https://issues.apache.org/jira/browse/FLINK-1391
             Project: Flink
          Issue Type: Improvement
    Affects Versions: 0.8, 0.9
            Reporter: Robert Metzger


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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