I just started to fiddle with Spark a week ago. I am trying to understand take function more. I have a JavaRDD<T> variable, letís say dataSet which is initialized by getSequenceFileAsRDD, when I try dataSet.take(1), it throughs an error as follows:
java.lang.IllegalStateException: Must not use direct buffers with
But when I add add the following lines before the take call:
Then take() works. I am confused here by how RDD's take method. Can anybody help me explain why this happens?
Thanks a lot,