Github user andrewor14 commented on the pull request: https://github.com/apache/spark/pull/8504#issuecomment-136821267 @jerryshao doesn't YARN already come with a stable REST API [1] for submitting applications? The main reason why we did it for standalone mode is because the Master used to only accept registrations through Akka, which provides little compatibility guarantees. Is the motivation here to provide an additional level of convenience for the user to submit Spark applications on YARN? [1] https://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html
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