Github user WangTaoTheTonic commented on the pull request:
https://github.com/apache/spark/pull/5722#issuecomment-118211126
@andrewor14 There are two motivations about this, first is mention in
https://github.com/apache/spark/pull/3314, we would like to control the retry
range when user set some port to 0, but @srowen came up this idea which is
setting each port to a range.
The other motivation is mentioned in
https://github.com/apache/spark/pull/5657. When we start a public port on a
specified setting, it better not to retry becasue once the retry happens client
will fail to connect it.
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