Rui Li created HIVE-17976:
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Summary: HoS: don't set output collector if there's no data to
process
Key: HIVE-17976
URL: https://issues.apache.org/jira/browse/HIVE-17976
Project: Hive
Issue Type: Bug
Components: Spark
Reporter: Rui Li
Assignee: Rui Li
Priority: Minor
MR doesn't set an output collector if no row is processed, i.e.
{{ExecMapper::map}} is never called. Let's investigate whether Spark should do
the same.
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