[HBASE-10333] Assignments are not retained on a cluster start

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.0, 0.96.1.1
• Fix Version/s: 0.98.0, 0.96.2, 0.99.0
• Hadoop Flags: Reviewed
• Assignee: Jimmy Xiang
• Reporter: Devaraj Das
• Created: 14/Jan/14 00:32
• Updated: 21/Feb/15 23:35
• Resolved: 17/Jan/14 00:28

Description

When a cluster is fully shutdown and then started up again with hbase.master.startup.retainassign set to true, I noticed that the assignments are not retained. Upon digging, it seems like HBASE-10101 made a change due to which the server holding the META previously is added to dead-servers (in HMaster.assignMeta). Later on, this makes the AssignmentManager think that the master recovered from a failure as opposed to a fresh cluster start (the ServerManager.deadServers list is not empty in the check within
AssignmentManager.processDeadServersAndRegionsInTransition)