Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/4188#issuecomment-71442313
PS @andrewor14 I did run my patched version on a cluster, with and without
the offending argument, using a command like that reported in SPARK-4267, and
it succeeded both times. Reasonable evidence this is the fix. Yes I suppose you
could consider re-quoting any parsed argument that has a space. I thought it
might be less surprising and error-prone to just not modify the command string,
so that simply joining on ' ' then gives you back the original command (well,
maybe without a run of excess whitespace in between args).
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