Github user sryza commented on the pull request:
https://github.com/apache/spark/pull/5478#issuecomment-93778753
Regarding the performance issue, this can be solved with the YARN
distributed cache in the same way it works for the Spark assembly jar. If the
file is placed on HDFS in a public location, it will be cached on the nodes as
a public YARN local resource so it doesn't need to be downloaded each time an
app is submitted.
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