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  1. Hive
  2. HIVE-10697

ObjectInspectorConvertors#UnionConvertor does a faulty conversion

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    Description

      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:

      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
      

      [1] https://github.com/apache/hive/blob/master/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/ObjectInspectorConverters.java#L466

      Attachments

        1. HIVE-10697.1.patch.txt
          8 kB
          Swarnim Kulkarni
        2. HIVE-10697.2.patch.txt
          10 kB
          Swarnim Kulkarni

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            swarnim Swarnim Kulkarni Assign to me
            swarnim Swarnim Kulkarni
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