Github user markhamstra commented on the pull request: https://github.com/apache/incubator-spark/pull/607#issuecomment-35333776 Marking them as experimental for 1.0.0 might not be a bad idea. I don't get the impression that the async actions are seeing a lot of use yet, so there may be some "I wish this were different" to be discovered as the async stuff is used more. It is important and fundamentally well-done work that can lead to some significantly different usage of Spark, so I think it is a good idea to get some form of async Java API out there to start generate more grounds for discussion -- and that discussion is also a good idea.
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