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From "cuijianwei (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12769) Replication fails to delete all corresponding zk nodes when peer is removed
Date Mon, 29 Dec 2014 13:23:13 GMT
cuijianwei created HBASE-12769:
----------------------------------

             Summary: 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: cuijianwei
            Priority: Minor


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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