Prasanth Jayachandran created HIVE-9529:
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Summary: "alter table .. concatenate" under Tez mode should create
TezTask
Key: HIVE-9529
URL: https://issues.apache.org/jira/browse/HIVE-9529
Project: Hive
Issue Type: Bug
Affects Versions: 1.0.0, 1.2.0, 1.1.0
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
"alter table .. concatenate" DDL command creates MR task by default. When hive
cli is launched with execution engine as tez, the scheduling of the MR task for
file merging could be delayed until tez session expiration. This happens
because YARN will not have capacity to launch another AppMaster for MR task. We
should create tez task to overcome this. When the execution engine is tez
TezTask will be created else MRTask will be created.
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