It's no different than any other operation on an RDD. A transformation doesn't actually do anything by itself, so does not block. An action triggers computation and blocks until the action completes. You can wait for it with a Future, sure.
On Fri, Jul 8, 2016 at 10:43 AM, Mikael Ståldal <mikael.stal...@magine.com> wrote: > In a Spark Streaming job, is the operation inside foreachRDD supposed to > synchronous / blocking? > > What if you do some asynchronous operation which returns a Future? Are you > then supposed to do Await on that Future? > -- > [image: MagineTV] > > *Mikael Ståldal* > Senior software developer > > *Magine TV* > mikael.stal...@magine.com > Grev Turegatan 3 | 114 46 Stockholm, Sweden | www.magine.com > > Privileged and/or Confidential Information may be contained in this > message. If you are not the addressee indicated in this message > (or responsible for delivery of the message to such a person), you may not > copy or deliver this message to anyone. In such case, > you should destroy this message and kindly notify the sender by reply > email. >
