Github user avulanov commented on the issue:
https://github.com/apache/spark/pull/12695
@vanzin This PR partly addresses a broader problem that path construction
is not consistent throughout Spark sources. Indeed, this is a potential source
of bugs. Here is an example
https://github.com/apache/spark/pull/13868#issuecomment-228932793. However,
author addresses the problem with regex, which does not seem to be optimal as
@srowen mentioned. I believe we should have a separate JIRA for making all path
references and construction error-prone and consistent, and check everything
including shell scripts. For example,
https://github.com/apache/spark/blob/master/build/mvn#L161 contains a reference
to `${MVN_BIN} -someParameters` which will fail if maven path contains a space.
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