So this means still you need to check the config of your External metastore.

If you run below - whats the output -

%scala

val metastoreURL = spark.sparkContext.hadoopConfiguration.get(“javax.jdo.option.ConnectionURL”)

 val metastoreUser = spark.sparkContext.hadoopConfiguration.get(“javax.jdo.option.ConnectionUserName”)

 val metastorePassword = spark.sparkContext.hadoopConfiguration.get(“javax.jdo.option.ConnectionPassword”) print(metastoreURL)

 print(metastoreUser)

also, it's worth try to recheck the configuration .