have you included the JDBC driver for your particular database on the spark classpath?

example for postgres:

./bin/spark-shell --driver-class-path postgresql-9.4.1207.jar --jars postgresql-9.4.1207.jar

https://spark.apache.org/docs/latest/sql-data-sources-jdbc.html

PS. I just noticed you want to read from Databricks SQL, not some kind of database.

Can you try with using another JDBC URL (2.6.22 or earlier)?

Also not sure if the driver you use is the correct one. Local I use com.simba.spark.jdbc.Driver

Or download the JDBC driver and add it to the spark classpath.