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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-21841) Leader election in HMS to run housekeeping tasks.
Date Fri, 14 Jun 2019 02:35:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-21841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16863633#comment-16863633
] 

Hive QA commented on HIVE-21841:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12971690/HIVE-21841.02.patch

{color:green}SUCCESS:{color} +1 due to 9 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 16069 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.llap.cache.TestBuddyAllocator.testMTT[2] (batchId=349)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/17564/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/17564/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-17564/

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: 12971690 - PreCommit-HIVE-Build

> Leader election in HMS to run housekeeping tasks.
> -------------------------------------------------
>
>                 Key: HIVE-21841
>                 URL: https://issues.apache.org/jira/browse/HIVE-21841
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 4.0.0
>            Reporter: Ashutosh Bapat
>            Assignee: Ashutosh Bapat
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>         Attachments: HIVE-21841.01.patch, HIVE-21841.02.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> HMS performs housekeeping tasks. When there are multiple HMSes we need to have a leader
HMS elected which will carry out those housekeeping tasks. 
> These tasks include execution of compaction tasks, auto-discovering partitions for external
tables, generation of compaction tasks, repl thread etc.
> Note that, though the code for compaction tasks, auto-discovery of partitions etc. is
in Hive, the actual tasks are initiated by an HMS configured to do so. So, leader election
is required only for HMS and not for HS2.



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