[HBASE-25288] Make MasterRpcServices not extends RSRpcServices and also HMaster not extends HRegionServer - ASF JIRA

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HMaster is not a sub class for HRegionServer now, and also MasterRpcServices is not a sub class for RSRpcServices.

MasterRpcServices still implements the AdminService interface, but only updateConfiguration, getRegionInfo, clearSlowLogsResponses and getLogEntries can be called, for other methods in AdminService, you will get a DoNotRetryIOException when calling against master.

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HMaster is not a sub class for HRegionServer now, and also MasterRpcServices is not a sub class for RSRpcServices. MasterRpcServices still implements the AdminService interface, but only updateConfiguration, getRegionInfo, clearSlowLogsResponses and getLogEntries can be called, for other methods in AdminService, you will get a DoNotRetryIOException when calling against master.

causes

HBASE-26951 HMaster should exit gracefully, when stopped via hbase-daemon.sh

relates to

HBASE-28136 HRegionServer should implement isStopping method

links to

GitHub Pull Request #3612