Github user nchammas commented on the pull request:
https://github.com/apache/spark/pull/4196#issuecomment-71857404
Hey @grzegorz-dubicki, could you edit the title of this PR and [the
matching JIRA issue](https://issues.apache.org/jira/browse/SPARK-5403) to
something more descriptive? Perhaps something like "Ignore UserKnownHostsFile
in SSH calls".
There are several possible causes behind `spark-ec2` hanging on launch, so
it would be good to specify what exactly we're fixing here. The PR and JIRA
titles become part of the commit history and release notes, respectively.
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