Spark doesn't know how to turn a Seq[Any] back into a row.  You would need to create a case class or something where we can figure out the schema.  What are you trying to do?

If you don't care about specifics fields and you just want to serialize the type you can use kryo:

implicit val anyEncoder = Encoders.kryo[Seq[Any]]

On Wed, Nov 2, 2016 at 9:57 AM, Daniel Haviv <> wrote:
I have the following scenario:

scala> val df = spark.sql("select * from danieltest3")
df: org.apache.spark.sql.DataFrame = [iid: string, activity: string ... 34 more fields]

Now I'm trying to map through the rows I'm getting:
<console>:32: error: Unable to find encoder for type stored in a Dataset.  Primitive types (Int, String, etc) and Product types (case classes) are supported by importing spark.implicits._  Support for serializing other types will be added in future releases.>r.toSeq)

What am I missing here ?

Thank you,