[SPARK-2.0][SQL] UDF containing non-serializable object does not work as expected

I am playing with spark 2.0 What I tried to test is: Create a UDF in which there is a non serializable object. What I expected is when this UDF is called during materializing the dataFrame where the UDF is used in "select", an task non serializable exception should be thrown. It depends also which

Kafka Support new topic subscriptions without requiring restart of the streaming context

How to add new topic to kafka without requiring restart of the streaming context? r7raul1...@163.com