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HBASE-27183 Support regionserver to connect to HMaster proxy port #4606
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Regionservers get active master address from Zookeeper/Master registry and tries to make RPC calls to master.
For security concerns, regionservers might require making connection to a different proxy port of master rather than it's original port retrieved from Zookeeper.
Configs:
hbase.master.expose.proxy.port: Master can use this config (int) to expose new proxy port on active and backup master znodes.hbase.client.consume.master.proxy.port: Clients/Regionservers can use this config (boolean) to determine whether to connect to active master on new proxy port that master has exposed or continue using original port of master for connection.