How to set and get static variables from spark?

Question

I have a class as this:

public class Test {
    private static String name;

    public static String getName() {
        return name;
    }

    public stati         


        

Answer 1

The copy of your class in your driver process isn't the copy in your executors. They aren't in the same ClassLoader, or even the same JVM, or even on the same machine. Setting a static variable on the driver does nothing to the other copies, hence you find it null remotely.