Ahmad Alhour created HBASE-28342:
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Summary: Decommissioned hosts should be rejected by the HMaster
Key: HBASE-28342
URL: https://issues.apache.org/jira/browse/HBASE-28342
Project: HBase
Issue Type: Bug
Reporter: Ahmad Alhour
We had an issue with a cluster, internally at HubSpot, where a decommissioned
RegionServer was still being picked up by the HMaster. The host the
RegionServer was living on was impaired, and we couldn't correctly kill the
RegionServer, so the HMaster would periodically hear back from the host and
remove it from its dead host's list.
We would like to implement a fix so that this doesn't happen. We're thinking of
adding a boolean flag to the Decommission RegionServer Admin API that signifies
ignoring the startcode of the servername, when the boolean is True the host
will be rejected every time it comes back even if it had a different startcode.
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