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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12769) Replication fails to delete all corresponding zk nodes when peer is removed
Date Wed, 28 Oct 2015 05:04:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14977736#comment-14977736
] 

Hadoop QA commented on HBASE-12769:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12769179/12769-v6.txt
  against master branch at commit 210c3dd93748b5de65301f2cca2342f36e169b78.
  ATTACHMENT ID: 12769179

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

    {color:green}+1 tests included{color}.  The patch appears to include 12 new or modified
tests.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/16256//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-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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