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From Tobias Pfeiffer <>
Subject Re: type issue: found RDD[T] expected RDD[A]
Date Wed, 20 Aug 2014 01:43:01 GMT

On Tue, Aug 19, 2014 at 7:01 PM, Patrick McGloin <>
> I think the type of the data contained in your RDD needs to be a known
> case class and not abstract for createSchemaRDD.  This makes sense when
> you think it needs to know about the fields in the object to create the
> schema.

Exactly this. The actual message pointing to that is:

    "inferred type arguments [T] do not conform to method createSchemaRDD's
type parameter bounds [A <: Product]"

All case classes are automatically subclasses of Product, but otherwise you
will have to extend Product and add the required methods yourself.


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