[replication] failover is sloppy with znodes
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Key: HBASE-3648
URL: https://issues.apache.org/jira/browse/HBASE-3648
Project: HBase
Issue Type: Bug
Affects Versions: 0.90.1
Reporter: Jean-Daniel Cryans
Assignee: Jean-Daniel Cryans
Priority: Critical
Fix For: 0.90.2
ReplicationZookeeper is a bit sloppy in how it handles the znodes during
failover:
- when creating the lock, it doesn't cleanly handle the situation where the
parent znode might already be deleted.
- when deleting the znodes after a successful move, it doesn't make sure to
delete the lock znode last.
- after deleting the lock, there's a window where another region server could
have already created another lock and deleted the znodes which would abort the
first region server (saw it on one cluster).
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