set abort in ExecMapper when Hive's record reader got an IOException
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Key: HIVE-1543
URL: https://issues.apache.org/jira/browse/HIVE-1543
Project: Hadoop Hive
Issue Type: Improvement
Reporter: Ning Zhang
Assignee: Ning Zhang
When RecordReader got an IOException, ExecMapper does not know and will close
the operators as if there is not error. We should catch this exception and
avoid writing partial results to HDFS which will be removed later anyways.
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