Github user sryza commented on the pull request: https://github.com/apache/spark/pull/102#issuecomment-37374693 Unfortunately, the alpha/stable distinction doesn't fully capture the differences here because the APIs are different between the 0.23 Hadoop line and the 2.0 line, both of which fall under yarn-alpha. The comment above getMapReduceApplicationClasspath explains the differences between 0.23, 2.0, and 2.2.
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