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From "Hive QA (Jira)" <>
Subject [jira] [Commented] (HIVE-20113) Shuffle avoidance: Disable 1-1 edges for sorted shuffle
Date Wed, 18 Sep 2019 09:42:00 GMT


Hive QA commented on HIVE-20113:

Here are the results of testing the latest attachment:

{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 16761 tests executed
*Failed tests:*

Test results:
Console output:
Test logs:

Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 1 tests failed

This message is automatically generated.

ATTACHMENT ID: 12980540 - PreCommit-HIVE-Build

> Shuffle avoidance: Disable 1-1 edges for sorted shuffle 
> --------------------------------------------------------
>                 Key: HIVE-20113
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Tez
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Major
>              Labels: Branch3Candidate
>         Attachments: HIVE-20113.1.patch, HIVE-20113.2.patch, HIVE-20113.3.patch, HIVE-20113.4.patch,
HIVE-20113.4.patch, HIVE-20113.5.patch, HIVE-20113.6.patch, HIVE-20113.7.patch, HIVE-20113.8.patch,
> 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).

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