https://community.cloudera.com/t5/Support-Questions/How-to-check-if-my-Secondary-Name-Node-is-synced-up-with-the/m-p/195318#M157377 <P>Hi all,</P><P>This question is in continuation to: <A href="https://community.hortonworks.com/questions/138257/how-to-sync-a-new-secondary-namenode-to-the-cluste.html" target="_blank">https://community.hortonworks.com/questions/138257/how-to-sync-a-new-secondary-namenode-to-the-cluste.html</A></P><P>Scenario: I have a 12 node cluster (machines 01-12) with 8 data nodes. 06, 07 are the NN and SNN respectively. 01 and 12 run the Hive related services. This cluster was upgraded to 12 node from 4 node where 01 was the namenode and 02-05 were the data nodes.</P><P>So I used the "Move Namenode" and "Move Snamenode" wizards on Ambari to move the nn and snn from 01 to 06 and 07 respectively. I verified all the services running on nn are running on snn as well. Now I want to check if my snn is working properly. So I shut down all the services on nn and tried to connect to Hive from one of the hosts (02) and it failed with the error:</P><PRE>Call From &lt;machine_02/ip_address_of_02&gt; to &lt;machine_06:8020&gt; failed on connection exception: java.net.ConnectException: Connection refused; For more details see: <A href="http://wiki.apache.org/hadoop/ConnectionRefused" target="_blank">http://wiki.apache.org/hadoop/ConnectionRefused</A></PRE><P>I don't know why it is trying to connect to nn (06) and not snn (07). Can someone point what I am missing here?</P> Fri, 29 Sep 2017 22:55:37 GMT sree_kuppa 2017-09-29T22:55:37Z