[HIVE-13240] GroupByOperator: Drop the hash aggregates when closing operator

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.1, 1.3.0, 2.0.0
• Fix Version/s: 1.3.0, 2.0.1, 2.1.0
• Component/s: Query Processor
• Target Version/s: 1.3.0, 2.0.1
• Assignee: Gopal Vijayaraghavan
• Reporter: Gopal Vijayaraghavan
• Created: 09/Mar/16 02:29
• Updated: 21/Jun/16 15:43
• Resolved: 22/Apr/16 18:19

Description

GroupByOperator holds onto the Hash aggregates accumulated when the plan is cached.

Drop the hashAggregates in case of error during forwarding to the next operator.

Added for PTF, TopN and all GroupBy cases.

Issue Links

• is depended upon by: HIVE-13238 "java.lang.OutOfMemoryError: Java heap space" occurs at Hive on Tez