Spark - Error “A master URL must be set in your configuration” when submitting an app

Question

I have an Spark app which runs with no problem in local mode,but have some problems when submitting to the Spark cluster.

The error msg are as follows:

Answer 1

just add .setMaster("local") to your code as shown below:

val conf = new SparkConf().setAppName("Second").setMaster("local") 

It worked for me ! Happy coding !