question Re: both namenodes are standby! how can I active one of them? in Support Questions https://community.cloudera.com/t5/Support-Questions/both-namenodes-are-standby-how-can-I-active-one-of-them/m-p/146349#M108916 <P>the JNs are running.</P><P>here is the ZKFC log</P><P>Refused 2016-10-24 15:10:43,506 INFO ipc.Client (Client.java:handleConnectionFailure(874)) - Retrying connect to server: hdpmaster1/192.168.1.161:8020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=1, sleepTime=1000 MILLISECONDS) 2016-10-24 15:10:43,506 WARN ha.HealthMonitor (HealthMonitor.java:doHealthChecks(211)) - Transport-level exception trying to monitor health of NameNode at hdpmaster1/192.168.1.161:8020: java.net.ConnectException: Connection refused Call From hdpmaster1/192.168.1.161 to hdpmaster1:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: <A href="http://wiki.apache.org/hadoop/ConnectionRefused">http://wiki.apache.org/hadoop/ConnectionRefused</A></P> Mon, 24 Oct 2016 21:16:37 GMT hassenseoud 2016-10-24T21:16:37Z