Problem
When you try to access an already created mount point or create a new mount point, it fails with the error:
WASB: Fails with java.lang.NullPointerException
Cause
This error can occur when the root mount path (such as /mnt/) is also mounted to blob storage. Run the following command to check if the root path is also mounted:
%python dbutils.fs.mounts()
Check if /mnt appears in the list.
Solution
Unmount the /mnt/ mount point using the command:
%python dbutils.fs.unmount("/mnt")
Now you should be able to access your existing mount points and create new ones.