[HBASE-5179] Concurrent processing of processFaileOver and ServerShutdownHandler may cause region to be assigned before log splitting is completed, causing data loss

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.90.2
• Fix Version/s: 0.92.3
• Component/s: master
• Hadoop Flags: Reviewed
• Assignee: Chunhui Shen
• Reporter: Chunhui Shen
• Created: 11/Jan/12 06:53
• Updated: 12/Jun/22 20:07
• Resolved: 25/Oct/12 16:46

Description

If master's processing its failover and ServerShutdownHandler's processing happen concurrently, it may appear following case.
1.master completed splitLogAfterStartup()
2.RegionserverA restarts, and ServerShutdownHandler is processing.
3.master starts to rebuildUserRegions, and RegionserverA is considered as dead server.
4.master starts to assign regions of RegionserverA because it is a dead server by step3.

However, when doing step4(assigning region), ServerShutdownHandler may be doing split log, Therefore, it may cause data loss.

Issue Links

• incorporates: HBASE-4748 Race between creating recovered edits for META and master assigning ROOT and META.
• is related to: HBASE-5270 Handle potential data loss due to concurrent processing of processFaileOver and ServerShutdownHandler
• is related to: HBASE-5202 NPE during Master failover in master.AssignmentManager.regionOnline()

Sub-Tasks

• Handle potential data loss due to concurrent processing of processFaileOver and ServerShutdownHandler: Closed