@letsflykite If you go to Databricks Guide -> Spark -> Configuring Spark you'll see a guide on how to change some of the Spark configuration settings using init scripts. On the near term roadmap will also be the ability to do these through the UI in an easier fashion.

One word of caution - it should be fairly rare to need to change these settings. Typically it means there is something in the code that is not performing as expected and leading to the error.