RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby
两个namenode都是standby
在一台主机上执行:
hdfs haadmin -transitionToActive --forcemanual nn1
再访问,一台active 一台standy
Operation category READ is not supported in state standby
原文：http://ictedu.blog.51cto.com/12825266/1919052