Sean,

On Mon, Jan 26, 2015 at 10:28 AM, Sean Owen <sowen@cloudera.com> wrote:
Note that RDDs don't really guarantee anything about ordering though,
so this only makes sense if you've already sorted some upstream RDD by
a timestamp or sequence number.

Speaking of order, is there some reading on guarantees and non-guarantees about order in RDDs? For example, when reading a file and doing zipWithIndex, can I assume that the lines are numbered in order? Does this hold for receiving data from Kafka, too?

Tobias