get “ERROR: Can't get master address from ZooKeeper; znode data == null” when using Hbase shell

Question

I installed Hadoop2.2.0 and Hbase0.98.0 and here is what I do :

$ ./bin/start-hbase.sh 

$ ./bin/hbase shell

2.0.0-p353 :001 > list

the

Answer 1

I had the exact same error. The Linux firewall was blocking connectivity. One can test ports via telnet. A quick fix is to turn off the firewall and see if it fixes it:

Completely disable the firewall on all of your nodes. Note: this command will not survive a reboot of your machines.

systemctl stop firewalld

Long term fix is that you must configure the firewall to allow the hbase ports.

Note, your version of hbase may use different ports: https://issues.apache.org/jira/browse/HBASE-10123