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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18946) Stochastic load balancer assigns replica regions to the same RS
Date Mon, 27 Nov 2017 12:52:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266747#comment-16266747
] 

Hadoop QA commented on HBASE-18946:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 10s{color} | {color:blue}
Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  0s{color} | {color:blue}
Findbugs executables are not available. {color} |
| {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green}  0m  0s{color}
| {color:green} Patch does not have any anti-patterns. {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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m  0s{color}
| {color:green} The patch appears to include 1 new or modified test files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 24s{color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 42s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  9s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 33s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  6m 33s{color}
| {color:green} branch has no errors when building our shaded downstream artifacts. {color}
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 49s{color} |
{color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 13s{color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 51s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  7s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m  7s{color} | {color:green}
the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  1m  5s{color} | {color:red}
hbase-server: The patch generated 4 new + 31 unchanged - 0 fixed = 35 total (was 31) {color}
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| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  0s{color} | {color:red}
The patch has 1 line(s) that end in whitespace. Use git apply --whitespace=fix <<patch_file>>.
Refer https://git-scm.com/docs/git-apply {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  5m  0s{color}
| {color:green} patch has no errors when building our shaded downstream artifacts. {color}
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| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 54m  7s{color}
| {color:green} Patch does not cause any errors with Hadoop 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5
2.7.1 2.7.2 2.7.3 2.7.4 or 3.0.0-alpha4. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 49s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 40s{color} | {color:green}
hbase-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}100m 12s{color} | {color:red}
hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 34s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}180m 11s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:eee3b01 |
| JIRA Issue | HBASE-18946 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12899364/HBASE-18946_simple_8.patch
|
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  shadedjars  hadoopcheck  hbaseanti
 checkstyle  compile  |
| uname | Linux aa6b75705164 3.13.0-129-generic #178-Ubuntu SMP Fri Aug 11 12:48:20 UTC 2017
x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh
|
| git revision | master / f521000d78 |
| maven | version: Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z)
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| Default Java | 1.8.0_151 |
| checkstyle | https://builds.apache.org/job/PreCommit-HBASE-Build/10030/artifact/patchprocess/diff-checkstyle-hbase-server.txt
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| whitespace | https://builds.apache.org/job/PreCommit-HBASE-Build/10030/artifact/patchprocess/whitespace-eol.txt
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| unit | https://builds.apache.org/job/PreCommit-HBASE-Build/10030/artifact/patchprocess/patch-unit-hbase-server.txt
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|  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/10030/testReport/ |
| modules | C: hbase-client hbase-server U: . |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/10030/console |
| Powered by | Apache Yetus 0.6.0   http://yetus.apache.org |


This message was automatically generated.



> Stochastic load balancer assigns replica regions to the same RS
> ---------------------------------------------------------------
>
>                 Key: HBASE-18946
>                 URL: https://issues.apache.org/jira/browse/HBASE-18946
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha-3
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-18946.patch, HBASE-18946.patch, HBASE-18946_2.patch, HBASE-18946_2.patch,
HBASE-18946_simple_7.patch, HBASE-18946_simple_8.patch, TestRegionReplicasWithRestartScenarios.java
>
>
> Trying out region replica and its assignment I can see that some times the default LB
Stocahstic load balancer assigns replica regions to the same RS. This happens when we have
3 RS checked in and we have a table with 3 replicas. When a RS goes down then the replicas
being assigned to same RS is acceptable but the case when we have enough RS to assign this
behaviour is undesirable and does not solve the purpose of replicas. 
> [~huaxiang] and [~enis]. 



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