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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