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https://issues.apache.org/jira/browse/HBASE-12769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14979403#comment-14979403
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Hadoop QA commented on HBASE-12769:
-----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12769359/12769-branch-1-v5.txt
  against branch-1 branch at commit 4b018d2a3988a70d98e2388d0013e63857c5e193.
  ATTACHMENT ID: 12769359

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 9 new 
or modified tests.

    {color:green}+1 hadoop versions{color}. The patch compiles with all 
supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.7.0 
2.7.1)

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 protoc{color}.  The applied patch does not increase the 
total number of protoc compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any 
warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the 
total number of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new 
Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines 
longer than 100

  {color:green}+1 site{color}.  The mvn post-site goal succeeds with this patch.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/16267//testReport/
Release Findbugs (version 2.0.3)        warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/16267//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: 
https://builds.apache.org/job/PreCommit-HBASE-Build/16267//artifact/patchprocess/checkstyle-aggregate.html

  Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/16267//console

This message is automatically generated.

> Replication fails to delete all corresponding zk nodes when peer is removed
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-12769
>                 URL: https://issues.apache.org/jira/browse/HBASE-12769
>             Project: HBase
>          Issue Type: Improvement
>          Components: Replication
>    Affects Versions: 0.99.2
>            Reporter: Jianwei Cui
>            Assignee: Jianwei Cui
>            Priority: Minor
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: 12769-branch-1-v5.txt, 12769-v2.txt, 12769-v3.txt, 
> 12769-v4.txt, 12769-v5.txt, 12769-v6.txt, HBASE-12769-trunk-v0.patch, 
> HBASE-12769-trunk-v1.patch
>
>
> When removing a peer, the client side will delete peerId under peersZNode 
> node; then alive region servers will be notified and delete corresponding 
> hlog queues under its rsZNode of replication. However, if there are failed 
> servers whose hlog queues have not been transferred by alive servers(this 
> likely happens if setting a big value to "replication.sleep.before.failover" 
> and lots of region servers restarted), these hlog queues won't be deleted 
> after the peer is removed. I think remove_peer should guarantee all 
> corresponding zk nodes have been removed after it completes; otherwise, if we 
> create a new peer with the same peerId with the removed one, there might be 
> unexpected data to be replicated.



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