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https://issues.apache.org/jira/browse/HIVE-21841?focusedWorklogId=261144&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-261144
 ]

ASF GitHub Bot logged work on HIVE-21841:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 17/Jun/19 05:16
            Start Date: 17/Jun/19 05:16
    Worklog Time Spent: 10m 
      Work Description: maheshk114 commented on pull request #668: HIVE-21841 : 
Add configuration to specify the hostname of HMS leader …to run housekeeping 
tasks in.
URL: https://github.com/apache/hive/pull/668#discussion_r294128926
 
 

 ##########
 File path: 
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/conf/MetastoreConf.java
 ##########
 @@ -386,6 +386,12 @@ public static ConfVars getMetaConf(String name) {
         new RangeValidator(1, 20), "Number of consecutive compaction failures 
(per table/partition) " +
         "after which automatic compactions will not be scheduled any more.  
Note that this must be less " +
         "than hive.compactor.history.retention.failed."),
+    
METASTORE_HOUSEKEEPING_LEADER_HOSTNAME("metastore.housekeeping.leader.hostname",
+            "hive.metastore.housekeeping.leader.hostname", "",
+"If there are multiple Thrift metastore services running, the hostname of 
Thrift metastore " +
 
 Review comment:
   is the line properly indented ?
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 261144)
    Time Spent: 20m  (was: 10m)

> 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: 20m
>  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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