[IMPALA-2731] Hbase scan node uses 2-4x memory after upgrade to impala 2.2.8

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.3.0, Impala 2.2.8
• Fix Version/s: Impala 2.5.0, Impala 2.3.2, Impala 2.2.9
• Target Version: Impala 2.5.0, Impala 2.3.2, Impala 2.2.9
• Assignee: Martin Grund
• Reporter: Juan Yu
• Created: 02/Dec/15 16:57
• Updated: 27/Mar/16 00:28
• Resolved: 05/Dec/15 00:14

Description

After upgrading to Impala 2.2.8, the same query that access HBase table consume 2-4x memory than before.
This seems a regression caused by IMPALA-2284: Disallow long (1<<30) strings in group_concat()