[HBASE-9207] An Offline SplitParent Region can be assigned breaking split references

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.0, 0.95.1, 0.94.10
• Fix Version/s: 0.94.12
• Component/s: Region Assignment
• Hadoop Flags: Reviewed
• Assignee: Jimmy Xiang
• Reporter: Matteo Bertozzi
• Created: 13/Aug/13 20:20
• Updated: 24/Sep/13 20:32
• Resolved: 15/Aug/13 20:11

Description

An offline split parent region can be assigned by using 'assign' from shell.

This may trigger a compaction on the split parent region that should be offline, breaking the references of the two daughters.

The easy way to test this is:

• disable compactions
• create a table and insert some row
• split
• shutdown the master (otherwise there's a state checked inside the AssignmentManager)
• start the master
• assign the region marked as OFFLINE => true, SPLIT => true (the compaction on region startup will probably break the reference of the two daughters)

Issue Links

• is a clone of: HBASE-9204 An Offline SplitParent Region can be assigned breaking split references
• is depended upon by: HBASE-8760 possible loss of data in snapshot taken after region split