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https://issues.apache.org/jira/browse/PIG-5134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15942974#comment-15942974
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Nandor Kollar commented on PIG-5134:
------------------------------------
Actually this issue came up before, Kryo was downgraded on spark branch to 2.21
(but to support Hive UDFs and ORC we need 2.22): PIG-4693
> Fix TestAvroStorage unit test in Spark mode
> -------------------------------------------
>
> Key: PIG-5134
> URL: https://issues.apache.org/jira/browse/PIG-5134
> Project: Pig
> Issue Type: Bug
> Components: spark
> Reporter: liyunzhang_intel
> Assignee: Nandor Kollar
> Fix For: spark-branch
>
> Attachments: PIG-5134_2.patch, PIG-5134.patch
>
>
> It seems that test fails, because Avro GenericData#Record doesn't implement
> Serializable interface:
> {code}
> 2017-02-23 09:14:41,887 ERROR [main] spark.JobGraphBuilder
> (JobGraphBuilder.java:sparkOperToRDD(183)) - throw exception in
> sparkOperToRDD:
> org.apache.spark.SparkException: Job aborted due to stage failure: Task 0.0
> in stage 9.0 (TID 9) had a not serializable result:
> org.apache.avro.generic.GenericData$Record
> Serialization stack:
> - object not serializable (class:
> org.apache.avro.generic.GenericData$Record, value: {"key": "stuff in closet",
> "value1": {"thing": "hat", "count": 7}, "value2": {"thing": "coat", "count":
> 2}})
> - field (class: org.apache.pig.impl.util.avro.AvroTupleWrapper, name:
> avroObject, type: interface org.apache.avro.generic.IndexedRecord)
> - object (class org.apache.pig.impl.util.avro.AvroTupleWrapper,
> org.apache.pig.impl.util.avro.AvroTupleWrapper@3d3a58c1)
> at
> org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1431)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1419)
> {code}
> The failing tests is a new test introduced with merging trunk to spark
> branch, that's why we didn't see this error before.
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