Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/4676#issuecomment-75155705
@zhzhan I apologize for the extra round trip on this simple change, but it
occurs to me that we should quote `"$pid"`. We should probably do it elsewhere
in this an other scripts as @nchammas reminds us, but I imagine it's especially
important as the argument to `rm`. Just in case there's... I don't know, a
`/opt/very/important/Project` file and for some reason the PID path is
`/opt/very/important/Project Data/pid`!
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