Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/2836#issuecomment-59580682
> Could you please give me an example if you see some option where possibly
might be the problem.
If you look at the documentation of the `ssh`, function, it says "Run a
command on a host through SSH, retrying up to five times _and then throwing an
exception if ssh continues to fail_". If a library can't be installed, I think
that the current code will cause `spark-ec2` to exit rather than continuing in
a best-effort manner.
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