[HBASE-16636] Regions in Transition counts wrong (zero) in HMaster /jmx, prevents detecting Regions Stuck in Transition

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.2
• Component/s: UI

Environment

HDP 2.3.2

• Assignee: Unassigned
• Reporter: Hari Sekhon
• Created: 15/Sep/16 09:03
• Updated: 15/Jun/22 00:49
• Resolved: 15/Jun/22 00:49

Description

I've discovered that the Region in Transition counts are wrong in the HMaster UI /jmx page.

The /master-status page clearly shows 3 regions stuck in transition but the /jmx page I was monitoring reported 0 for ritCountOverThreshold.

}, {
    "name" : "Hadoop:service=HBase,name=Master,sub=AssignmentManger",
    "modelerType" : "Master,sub=AssignmentManger",
    "tag.Context" : "master",
    ...
    "ritOldestAge" : 0,
    "ritCountOverThreshold" : 0,
    ...
    "ritCount" : 0,

I have a nagios plugin I wrote which was checking this which I've since had to rewrite to parse the /master-status page instead (the code is in check_hbase_regions_stuck_in_transition.py at https://github.com/harisekhon/nagios-plugins).

I'm attaching screenshots of both /master-status and /jmx to show the difference in the 2 pages on the HMaster.

Issue Links

• relates to: HBASE-14644 Region in transition metric is broken