[HBASE-24164] Retain the ReadRequests and WriteRequests of region on web UI after alter table

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.3.0, 2.2.5
• Component/s: metrics
• Hadoop Flags: Reviewed
• Assignee: Zheng Wang
• Reporter: Zheng Wang
• Created: 10/Apr/20 08:21
• Updated: 21/May/20 01:11
• Resolved: 18/May/20 19:57

Description

When we alter a table, all regions of it will do a rs self move, then the ReadRequests and WriteRequests will be cleared, but they are very useful metrics, my propose is keep them in RegionServerAccounting on close if it is a rs self move, and recover them on open.

Issue Links

• links to: GitHub Pull Request #1500
• links to: GitHub Pull Request #1712