Getting NullPointerException when running Spark Code in Zeppelin 0.7.1

Question

I have installed Zeppelin 0.7.1. When I tried to execute the Example spark program(which was available with Zeppelin Tutorial notebook), I am getting t

Answer 1

Check if your NameNode have gone in safe mode.

check with below syntax:

sudo -u hdfs hdfs dfsadmin -safemode get

to leave from safe mode use below command:

sudo -u hdfs hdfs dfsadmin -safemode leave