[HBASE-3648] [replication] failover is sloppy with znodes

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.90.1
• Fix Version/s: 0.90.2
• Hadoop Flags: Reviewed
• Assignee: Jean-Daniel Cryans
• Reporter: Jean-Daniel Cryans
• Created: 15/Mar/11 18:34
• Updated: 20/Nov/15 12:42
• Resolved: 15/Mar/11 21:52

Description

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).