$ hdfs dfs -ls hdfs://test:8020/hbase ls: Operation category READ is not supported in state standby. Visit https://s.apache.org/sbnn-error 1. 2. 意思是namenode不可用,查看namenode状态 hdfs-site.xml <property> <name>dfs.ha.namenodes.nameservice1</name> <value>namenode223,namenode47...