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https://issues.apache.org/jira/browse/HIVE-16462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971915#comment-15971915
 ] 

Hive QA commented on HIVE-16462:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12863702/HIVE-16462.1.patch

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

{color:red}ERROR:{color} -1 due to 3 failed/errored test(s), 10580 tests 
executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[ppd_windowing2] 
(batchId=10)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[vector_order_null] 
(batchId=28)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[vector_if_expr]
 (batchId=143)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/4715/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/4715/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-4715/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 3 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12863702 - PreCommit-HIVE-Build

> Vectorization: Enabling hybrid grace disables specialization of all reduce 
> side joins
> -------------------------------------------------------------------------------------
>
>                 Key: HIVE-16462
>                 URL: https://issues.apache.org/jira/browse/HIVE-16462
>             Project: Hive
>          Issue Type: Bug
>          Components: Vectorization
>            Reporter: Jason Dere
>            Assignee: Jason Dere
>         Attachments: HIVE-16462.1.patch
>
>
> Observed by [~gopalv].
> Having grace hash join enabled prevents the specialized vector hash joins 
> during the vectorizer stage of query planning. However 
> hive.llap.enable.grace.join.in.llap will later disable grace hash join 
> (LlapDecider runs after Vectorizer). If we can disable the grace hash join 
> before vectorization kicks in then we can still benefit from the specialized 
> vector hash joins.
> This can be special cased for the llap.execution.mode=only case.



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