@hassenseoud  Triggering log roll on remote NameNode hdpmaste r2/192.168.1.162:8020 2016-10-24 11:25:52,108 WARN ha.EditLogTailer (EditLogTailer.java:triggerActiveLogRoll(276)) - Unable to trigger a roll of the active NN org.apache.hadoop.ipc.RemoteException (org.apache.hadoop.ipc.StandbyException): Operation category JOURNAL is not supported in state standby Check the active NN $ hdfs haadmin -getServiceState <serviceId> : dfs.ha.namenodes.mycluster in hdfs-site.xm $ hdfs haadmin -getServiceState namenode2 active Example $ hdfs haadmin -getServiceState namenode1 standby Action 2 Shutdown whichever of the above was/is the standby from Ambari ensure its stopped. Action 3 From Ambari do a rolling restart of the zk forum, wait untill all 3 or x are restarted Action 4 Execute sequentially  the below cmd's $ hdfs dfsadmin -safemode enter $ hdfs dfsadmin -saveNamespace $ hdfs dfsadmin -safemode leave Restart the JN and the above NN service when all is green then  you can safely start the standby ... View more