[HIVE-9529] "alter table .. concatenate" under Tez mode should create TezTask

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 1.1.0, 1.2.0
• Fix Version/s: 1.2.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 31/Jan/15 01:58
• Updated: 18/May/15 19:49
• Resolved: 03/Feb/15 18:14

Description

"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.