Gopal V created HIVE-20113: ------------------------------ Summary: Shuffle avoidance: Disable 1-1 edges for sorted shuffle Key: HIVE-20113 URL: https://issues.apache.org/jira/browse/HIVE-20113 Project: Hive Issue Type: Bug Components: Tez Reporter: Gopal V
The sorted shuffle avoidance can have some issues when the shuffle data gets broken up into multiple chunks on disk. The 1-1 edge cannot skip the tez final merge - there's no reason for 1-1 to have a final merge at all, it should open a single compressed file and write a single index entry. Until the shuffle issue is resolved & a lot more testing, it is prudent to disable the optimization for sorted shuffle edges and stop rewriting the RS(sorted) = = = RS(sorted) into RS(sorted) = = = RS(FORWARD). -- This message was sent by Atlassian JIRA (v7.6.3#76005)