[HBASE-4348] Add metrics for regions in transition

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.92.0
• Fix Version/s: 0.95.0
• Component/s: metrics
• Hadoop Flags: Reviewed
• Assignee: Himanshu Vashishtha
• Reporter: Todd Lipcon
• Created: 07/Sep/11 22:38
• Updated: 05/Aug/14 20:11
• Resolved: 06/Apr/12 03:47

Description

The following metrics would be useful for monitoring the master:

• the number of regions in transition
• the number of regions in transition that have been in transition for more than a minute
• how many seconds has the oldest region-in-transition been in transition