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https://issues.apache.org/jira/browse/HIVE-12743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070563#comment-15070563
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Prasanth Jayachandran commented on HIVE-12743:
----------------------------------------------
The cleaner solution is to add auto-registration support in kryo. But that's
more involved. Mostly kryo will work even without registration using FQCN but
sometimes exceptions like these happen. Not sure why.
> RCFileInputFormat needs to be registered with kryo
> --------------------------------------------------
>
> Key: HIVE-12743
> URL: https://issues.apache.org/jira/browse/HIVE-12743
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Attachments: HIVE-12743.1.patch
>
>
> Ran into an issue with union distinct query that uses RCFile table with the
> following exception
> {code}
> Caused by: java.lang.IllegalArgumentException: Unable to create serializer
> "org.apache.hive.com.esotericsoftware.kryo.serializers.FieldSerializer" for
> class: org.apache.hadoop.hive.ql.io.RCFileInputFormat
> at
> org.apache.hive.com.esotericsoftware.kryo.factories.ReflectionSerializerFactory.makeSerializer(ReflectionSerializerFactory.java:67)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hive.com.esotericsoftware.kryo.factories.ReflectionSerializerFactory.makeSerializer(ReflectionSerializerFactory.java:45)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hive.com.esotericsoftware.kryo.Kryo.newDefaultSerializer(Kryo.java:380)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hive.com.esotericsoftware.kryo.Kryo.getDefaultSerializer(Kryo.java:364)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> at
> org.apache.hive.com.esotericsoftware.kryo.util.DefaultClassResolver.registerImplicit(DefaultClassResolver.java:74)
> ~[hive-exec-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
> {code}
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