Github user srowen commented on the issue:
https://github.com/apache/spark/pull/14104
Although I don't think it's essential to mention this API (it's in the API
doc) it wouldn't hurt to point to it here. The mention should be accurate
though. I think it's correct to say that the Spark RDD API also exposes
asynchronous versions of some actions like foreach, which return a handle
immediately to the caller which can be used to wait for its completion.
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