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https://issues.apache.org/jira/browse/HBASE-12769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14975821#comment-14975821
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Jianwei Cui commented on HBASE-12769:
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Sorry to reply late [~tedyu], patch v5 moves the corresponding unit test into
TestHBaseFsckOneRS.java.
Thanks
> 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
> Attachments: 12769-v2.txt, 12769-v3.txt, 12769-v4.txt, 12769-v5.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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