[HBASE-21082] Reimplement assign/unassign related procedure metrics

• Type: Sub-task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.3.0
• Component/s: amv2, metrics
• Hadoop Flags: Incompatible change, Reviewed

Release Note

Now we have four types of RIT procedure metrics, assign, unassign, move, reopen. The meaning of assign/unassign is changed, as we will not increase the unassign metric and then the assign metric when moving a region.
Also introduced two new procedure metrics, open and close, which are used to track the open/close region calls to region server. We may send open/close multiple times to finish a RIT since we may retry multiple times.

• Assignee: Duo Zhang
• Reporter: Duo Zhang
• Created: 21/Aug/18 07:37
• Updated: 01/Mar/19 20:15
• Resolved: 01/Mar/19 14:31

Description

As after HBASE-20881, we only have one TRSP procedure to handle all the assign/unassign/move/reopen operations, we need to reimplement(redefine?) the metrics for these procedures.

Issue Links

• relates to: HBASE-20881 Introduce a region transition procedure to handle all the state transition for a region