[HBASE-4377] [hbck] Offline rebuild .META. from fs data only.

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.92.0
• Fix Version/s: 0.90.5
• Hadoop Flags: Reviewed
• Assignee: Jonathan Hsieh
• Reporter: Jonathan Hsieh
• Created: 12/Sep/11 23:35
• Updated: 20/Nov/15 11:52
• Resolved: 22/Nov/11 03:02

Description

In a worst case situation, it may be helpful to have an offline .META. rebuilder that just looks at the file system's .regioninfos and rebuilds meta from scratch. Users could move bad regions out until there is a clean rebuild.

It would likely fill in region split holes. Follow on work could given options to merge or select regions that overlap, or do online rebuilds.

Issue Links

• is blocked by: HBASE-4515 User.getCurrent() can fail to initialize the current user
• is blocked by: HBASE-4506 [hbck] Allow HBaseFsck to be instantiated without connecting
• is blocked by: HBASE-4509 [hbck] Improve region map output
• is depended upon by: HBASE-4632 Offline meta rebuild should check if hbase is online before acting.
• is related to: HBASE-4335 Splits can create temporary holes in .META. that confuse clients and regionservers
• relates to: HBASE-4508 Backport HBASE-3777 to 0.90 branch
• relates to: HBASE-4058 Extend TestHBaseFsck with a complete .META. recovery scenario