Zeppelin [0.7.2]: NullPointerException on executing paragraph from a new Notebook

[Nikhil Utane]

Hi,

Whenever I create a new notebook and run a paragraph, I get the
NullPointerException error. If I run from an existing notebook then no
problem.

java.lang.NullPointerException
    at org.apache.zeppelin.spark.Utils.invokeMethod(Utils.java:38)
    at org.apache.zeppelin.spark.Utils.invokeMethod(Utils.java:33)
    at
org.apache.zeppelin.spark.SparkInterpreter.createSparkContext_2(SparkInterpreter.java:391)
    at
org.apache.zeppelin.spark.SparkInterpreter.createSparkContext(SparkInterpreter.java:380)
    at
org.apache.zeppelin.spark.SparkInterpreter.getSparkContext(SparkInterpreter.java:146)
    at
org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:828)

I workaround the problem by restarting the Zeppelin daemon. Saw other
instances of this error but resolution given was it is fixed in 0.7.2
version which is what I am using. Anybody else facing the same problem?
Have I missed something in configuration?

Thanks & Regards
Nikhil