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https://issues.apache.org/jira/browse/HIVE-21841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16866625#comment-16866625
 ] 

Hive QA commented on HIVE-21841:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m 
55s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
20s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
50s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
34s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  2m 
36s{color} | {color:blue} standalone-metastore/metastore-common in master has 
31 extant Findbugs warnings. {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  1m 
12s{color} | {color:blue} standalone-metastore/metastore-server in master has 
184 extant Findbugs warnings. {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  4m 
11s{color} | {color:blue} ql in master has 2255 extant Findbugs warnings. 
{color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m 
42s{color} | {color:blue} itests/hive-unit in master has 2 extant Findbugs 
warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
47s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
28s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  3m 
30s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
55s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  2m 
55s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
18s{color} | {color:red} itests/hive-unit: The patch generated 1 new + 0 
unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  9m 
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
47s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
15s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 47m 22s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  findbugs  checkstyle  compile  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 
3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-17628/dev-support/hive-personality.sh
 |
| git revision | master / 2d3a8f8 |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-17628/yetus/diff-checkstyle-itests_hive-unit.txt
 |
| modules | C: standalone-metastore/metastore-common 
standalone-metastore/metastore-server ql itests/hive-unit U: . |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-17628/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> 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, 
> HIVE-21841.04.patch, HIVE-21841.05.patch, HIVE-21841.06.patch
>
>          Time Spent: 3.5h
>  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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