@Michael Nitschinger​ Could you let us know your cluster DBR versions?

If you can add spark configuration: spark.driver.extraJavaOptions verbose:class to your cluster and run your use case again, this will print out the class org.apache.spark.sql.catalyst.json.CreateJacksonParser is loading from which jar in the driver stdout logs.

With those two info, I can decompile the jar and find out the root cause of the issue.