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https://issues.apache.org/jira/browse/HBASE-22408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-22408.
---------------------------
Resolution: Fixed
Re-resolving. Only goes back to branch-2.2. Couldn't bring it further back.
> add a metric for regions OPEN on non-live servers
> -------------------------------------------------
>
> Key: HBASE-22408
> URL: https://issues.apache.org/jira/browse/HBASE-22408
> Project: HBase
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Major
> Fix For: 3.0.0, 2.3.0, 2.2.1
>
>
> This serves 2 purposes for monitoring:
> 1) Catching when regions are on dead servers due to long WAL splitting or
> other delays in SCP. At that time, the regions are not listed as RITs; we'd
> like to be able to have alerts in such cases.
> 2) Catching various bugs in assignment and procWAL corruption, etc. that
> leave region "OPEN" on a server that no longer exists, again to alert the
> administrator via a metric.
> Later, it might be possible to add more logic to distinguish 1 and 2, and to
> mitigate 2 automatically and also set some metric to alert the administrator
> to investigate later.
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