Github user aarondav commented on the pull request:
https://github.com/apache/spark/pull/237#issuecomment-39654566
Alright, I changed up the solution by having Maven also download the
datanucleus jars into lib_managed/jars/ (unlike SBT, Maven will only download
these jars, and only when building Spark with Hive). Now we will include
datanucleus on the classpath if they're present in lib_managed and the Spark
assembly includes Hive (by looking up with the "jar" command).
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