Github user marmbrus commented on the pull request: https://github.com/apache/spark/pull/448#issuecomment-42224442 @kanzhang, Good point about the public APIs. I talked with @pwendell and we are a little concerned that this.type will make binary computability hard long term, mostly because we don't understand the bytecode being produced. Could you possibly run `javap` on some of the RDD classes and let us know what the function signatures look like for the changed methods?
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