[jira] [Created] (HBASE-22107) make dead server metric work for HBase in a compute fabric (e.g. YARN) use case

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

Sergey Shelukhin created HBASE-22107:
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             Summary: make dead server metric work for HBase in a compute fabric (e.g. YARN) use case
                 Key: HBASE-22107
                 URL: https://issues.apache.org/jira/browse/HBASE-22107
             Project: HBase
          Issue Type: Bug
            Reporter: Sergey Shelukhin


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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