https://community.cloudera.com/t5/Support-Questions/both-namenodes-are-standby-how-can-I-active-one-of-them/m-p/146350#M108917 <P>Ok this is due to NN not being active.</P><P>Did you start your NameNode as user HDFS? What are the permissions on the journal node directories?</P><P>AccessControlException: Access denied for user root. Superuser privilege is required 2016-10-24 11:26:12,138 WARN namenode.FSEditLog (JournalSet.java:selectInputStreams(280)) - Unable to determine input streams from QJM to [192 .168.1.161:8485, 192.168.1.162:8485, 192.168.1.163:8485].</P><P>Can you make sure your journalnodes are runnign as hdfs and also your namenodes? </P> Mon, 24 Oct 2016 22:03:33 GMT dgoodhand 2016-10-24T22:03:33Z