Gopal V created HIVE-14246:
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Summary: Tez: disable auto-reducer parallelism when CUSTOM_EDGE is
in place
Key: HIVE-14246
URL: https://issues.apache.org/jira/browse/HIVE-14246
Project: Hive
Issue Type: Bug
Components: Tez
Affects Versions: 2.2.0
Reporter: Gopal V
Assignee: Gopal V
Fix For: 2.2.0
The CUSTOM_SIMPLE_EDGE impl has differences between the size constraints of
either edge which cannot be represented by the ShuffleVertexManager presently.
Reducing the width based on the hashtable build side vs the streaming probe
side have different consequences since there is no order of runtime between
them.
Until the two parent vertices of the shuffle hash-join are related, this
feature causes massive inconsistency of performance across runs.
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