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https://issues.apache.org/jira/browse/HBASE-22410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin reassigned HBASE-22410:
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Assignee: Sergey Shelukhin
> add the notion of the expected # of servers and report a metric as an
> alternative to dead server metric for non-fixed server sets
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-22410
> URL: https://issues.apache.org/jira/browse/HBASE-22410
> Project: HBase
> Issue Type: Improvement
> Components: Operability
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Minor
>
> dead servers appear to only be cleaned up when a server comes up on the same
> host and port; however, if HBase is running on smth like YARN with many more
> hosts than RSes, RS may come up on a different server and the dead one will
> never be cleaned.
> The metric should be improved to account for that... it will potentially
> require configuring master with expected number of region servers, so that
> the metric could be output based on that.
> Dead server list should also be expired based on timestamp in such cases.
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