Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14104#discussion_r70222276
--- Diff: docs/programming-guide.md ---
@@ -1099,6 +1099,9 @@ for details.
</tr>
</table>
+Spark provide asynchronous actions to execute two or more actions
concurrently, these actions are execute asynchronously without blocking calling
thread. Refer to the RDD API doc for asynchronous actions
([Scala](api/scala/index.html#org.apache.spark.rdd.AsyncRDDActions),[Java](api/java/org/apache/spark/rdd/AsyncRDDActions.html))
--- End diff --
I still don't think this is accurate. Spark can execute actions
concurrently without this API. This merely makes the call non-blocking for the
caller. It really adds very little beyond calling the normal API and wrapping
in a Future (though it's more useful for the Java API where that's harder).
Hence why I thought it was unofficially deprecated.
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