dfs.default.uri hdfs://localhost:8020 hadoop.security.authentication kerberos dfs.nameservices gphd-cluster dfs.ha.namenodes.gphd-cluster nn1,nn2 dfs.namenode.rpc-address.gphd-cluster.nn1 smdw:8020 dfs.namenode.rpc-address.gphd-cluster.nn2 mdw:8020 dfs.namenode.http-address.gphd-cluster.nn1 smdw:50070 dfs.namenode.http-address.gphd-cluster.nn2 mdw:50070