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https://issues.apache.org/jira/browse/HIVE-10697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14700682#comment-14700682
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Swarnim Kulkarni commented on HIVE-10697:
-----------------------------------------
RB: https://reviews.apache.org/r/37563/
> ObjectInspectorConvertors#UnionConvertor does a faulty conversion
> -----------------------------------------------------------------
>
> Key: HIVE-10697
> URL: https://issues.apache.org/jira/browse/HIVE-10697
> Project: Hive
> Issue Type: Bug
> Components: Serializers/Deserializers
> Reporter: Swarnim Kulkarni
> Assignee: Swarnim Kulkarni
> Attachments: HIVE-10697.1.patch.txt
>
>
> Currently the UnionConvertor in the ObjectInspectorConvertors class has an
> issue with the convert method where it attempts to convert the
> objectinspector itself instead of converting the field.[1]. This should be
> changed to convert the field itself. This could result in a
> ClassCastException as shown below:
> {code}
> Caused by: java.lang.ClassCastException:
> org.apache.hadoop.hive.serde2.lazy.objectinspector.LazyUnionObjectInspector
> cannot be cast to org.apache.hadoop.hive.serde2.lazy.LazyString
> at
> org.apache.hadoop.hive.serde2.lazy.objectinspector.primitive.LazyStringObjectInspector.getPrimitiveWritableObject(LazyStringObjectInspector.java:51)
> at
> org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorConverter$TextConverter.convert(PrimitiveObjectInspectorConverter.java:391)
> at
> org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorConverter$TextConverter.convert(PrimitiveObjectInspectorConverter.java:338)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$UnionConverter.convert(ObjectInspectorConverters.java:456)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$StructConverter.convert(ObjectInspectorConverters.java:395)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$MapConverter.convert(ObjectInspectorConverters.java:539)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$StructConverter.convert(ObjectInspectorConverters.java:395)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.readRow(MapOperator.java:154)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.access$200(MapOperator.java:127)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:518)
> ... 9 more
> {code}
> [1]
> https://github.com/apache/hive/blob/master/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/ObjectInspectorConverters.java#L466
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