One of the nifty feature in any code development is the ability to debug your application using break points. Submitting a Spark job while waiting for it to complete will waste a lot of time debugging. Spark jobs can be debugging with `break points` and `step over` and `step into` and `step out` commands...
Jobs failed! Screamed an automatic failure alert in email inbox. Existing python scripts were failing in the server which fetched data from Oracle database. I wondered if the credentials had changed...