Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/30#issuecomment-41459274
@sryza I ended up rebuilding the jar and this time it worked!
For the failed jar, I was able to confirm that py4j/*.py were missing (even
though py4j/*.class were present). I have no idea how that is possible,
considering that I built the jars using the same maven command.
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