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

    [ https://issues.apache.org/jira/browse/HIVE-20113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932248#comment-16932248
] 

Hive QA commented on HIVE-20113:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12980540/HIVE-20113.9.patch

{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:*
{noformat}
org.apache.hadoop.hive.cli.TestMiniSparkOnYarnCliDriver.testCliDriver[spark_dynamic_partition_pruning]
(batchId=193)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/18632/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/18632/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-18632/

Messages:
{noformat}
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
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12980540 - PreCommit-HIVE-Build

> 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
>            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,
HIVE-20113.9.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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