Solving HBase HMaster Failover: Connection Refused to NameNode (Port 8020)

[#1]

I have a Hbase cluster of 3 nodes.
Below are the hostnames and daemons running on that machines.

hbase2 - Hmaster,RegionServer, Datanode and Nodemanager

hbase 1 - RegionServer,Namenode,Datanode, ResourceManager, NodeManager

hbase 3 - RegionServer, Datanode and Nodemanager

The moment I enter the run start-hbase.sh script. It throws the below given error

2018-06-13 14:56:52,455 INFO [hbase2:60000.activeMasterManager] retry.RetryInvocationHandler: Exception while invoking getFileInfo of class ClientNamenodeProtocolTranslatorPB over hbase2/10.94.1.119:8020 after 11 fail over attempts. Trying to fail over after sleeping for 17938ms. java.net.ConnectException: Call From hbase2/10.94.1.119 to hbase2:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused.

Hmaster is not running. RegionServers are working fine

[#2 · Accepted solution]

@Basil Paul,

Looks like your Namenode is not running. Start the NameNode first and then try starting HBase master.

Also, it is better to give proper hostnames instead of hbase1, hbase2 etc.

.

Please "Accept" the answer If this helps you. This will be really useful for other community users

-Aditya

[#3]

@Aditya Sirna Thankyou buddy. Started Namenode and it worked fine