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From "Feng Honghua (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8357) current region server failover mechanism for replication can lead to stale region server whose left hlogs can't be replicated by other region server
Date Wed, 17 Apr 2013 02:24:13 GMT
Feng Honghua created HBASE-8357:
-----------------------------------

             Summary: current region server failover mechanism for replication can lead to
stale region server whose left hlogs can't be replicated by other region server
                 Key: HBASE-8357
                 URL: https://issues.apache.org/jira/browse/HBASE-8357
             Project: HBase
          Issue Type: Bug
          Components: Replication
    Affects Versions: 0.94.3
            Reporter: Feng Honghua


consider this scenario: rs A/B/C, A dies, B and C race to lock A to help replicate A's left
unreplicated hlogs, B wins and successfully creates lock under A's znode, but before B copies
A's hlog queues to its own znode, B also dies, and C successfully creates lock under B's znode
and helps replicate B's own left hlogs. But A's left hlogs can't be replicated by any other
rs since B left back a lock under A's znode and B didn't transfer A's hlog queues to its own
znode before B dies.

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