how to debug java.lang.IllegalArgumentException: object is not an instance of declaring class

Hi Any idea how I can debug this problem. I suspect the problem has to do with how I am converting a JavaRDD> to a DataFrame. Is it boxing problem? I tried to use long and double instead of Long and Double when ever possible. Thanks in advance, Happy Holidays. Andy

Re: how to debug java.lang.IllegalArgumentException: object is not an instance of declaring class

Problem must be with how I am converting JavaRDD> to a DataFrame. Any suggestions? Most of my work has been done using pySpark. Tuples are a lot harder to work with in Java. JavaRDD> predictions = idLabeledPoingRDD.map((Tuple2 t2)