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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7397) Set the default threshold for fetch task conversion to 1Gb
Date Fri, 18 Jul 2014 14:52:05 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066409#comment-14066409
] 

Hive QA commented on HIVE-7397:
-------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12656489/HIVE-7397.4.patch.txt

{color:red}ERROR:{color} -1 due to 3 failed/errored test(s), 5740 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_tez_join_hash
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_ql_rewrite_gbtoidx
org.apache.hive.jdbc.miniHS2.TestHiveServer2.testConnection
{noformat}

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-Build/854/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-Build/854/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-Build-854/

Messages:
{noformat}
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: 12656489

> Set the default threshold for fetch task conversion to 1Gb
> ----------------------------------------------------------
>
>                 Key: HIVE-7397
>                 URL: https://issues.apache.org/jira/browse/HIVE-7397
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.14.0, 0.13.1
>            Reporter: Gopal V
>            Assignee: Gopal V
>              Labels: Performance
>             Fix For: 0.14.0
>
>         Attachments: HIVE-7397.1.patch, HIVE-7397.2.patch, HIVE-7397.3.patch, HIVE-7397.4.patch.txt
>
>
> Currently, modifying the value of hive.fetch.task.conversion to "more" results in a dangerous
setting where small scale queries function, but large scale queries crash.
> This occurs because the default threshold of -1 means apply this optimization for a petabyte
table.
> I am testing a variety of queries with the setting "more" (to make it the default option
as suggested by HIVE-887) change the default threshold for this feature to a reasonable 1Gb.



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