[jira] [Commented] (HBASE-20830) Document that region replica does not work well with AMv2

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-20830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16529572#comment-16529572 ] 

Hadoop QA commented on HBASE-20830:
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 28s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {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:green}+1{color} | {color:green} mvninstall {color} | {color:green}  8m 26s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} refguide {color} | {color:blue}  5m 55s{color} | {color:blue} branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect. {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:blue}0{color} | {color:blue} refguide {color} | {color:blue}  5m 12s{color} | {color:blue} patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect. {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 14s{color} | {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 20m 31s{color} | {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:b002b0b |
| JIRA Issue | HBASE-20830 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12929918/HBASE-20830.patch |
| Optional Tests |  asflicense  refguide  |
| uname | Linux 8c49cd273f57 3.13.0-139-generic #188-Ubuntu SMP Tue Jan 9 14:43:09 UTC 2018 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh |
| git revision | master / d822ee3a7c |
| maven | version: Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T18:33:14Z) |
| refguide | https://builds.apache.org/job/PreCommit-HBASE-Build/13466/artifact/patchprocess/branch-site/book.html |
| refguide | https://builds.apache.org/job/PreCommit-HBASE-Build/13466/artifact/patchprocess/patch-site/book.html |
| Max. process+thread count | 83 (vs. ulimit of 10000) |
| modules | C: . U: . |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/13466/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Document that region replica does not work well with AMv2
> ---------------------------------------------------------
>
>                 Key: HBASE-20830
>                 URL: https://issues.apache.org/jira/browse/HBASE-20830
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: HBASE-20830.patch
>
>
> As we can see lots of TODOs for region replica feature in the AssignmentManager' code. And also, now we rely on the openSeqNum to determine whether a region has been successfully reopened, but the openSeqNum for a non-default replica region seems unstable...
> It is too late for the 2.1.0 release so let's just add a note in ref guide to say that region replica does not work well with AMv2 first, and then start to make it stable in follow on minor or major release lines.



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