Wang Cheng created KYLIN-3084:
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Summary: File not found Exception when processing union-all view
in TEZ mode
Key: KYLIN-3084
URL: https://issues.apache.org/jira/browse/KYLIN-3084
Project: Kylin
Issue Type: Bug
Reporter: Wang Cheng
Priority: Minor
If hive.execution.engine=TEZ and hql contains union all, it causes exception
like: file not found when materializing the view or redistributing flat hive
table.
Here is the reason:
http://grokbase.com/t/hive/user/162r80a2g9/anyway-to-avoid-creating-subdirectories-by-insert-with-union
i.e. "The Tez execution of UNION is entirely parallel &
the task-ids overlaps - so the files created have to have unique names.
But the total counts for "Map 1" and "Map 2" are only available as the job
runs, so they write to different dirs."
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