Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/3645#issuecomment-68933786
@smola hey - currently `Utils.localHostName` should respect SPARK_LOCAL_IP
if it is set (it will try to find the associated interface). It will do a
reverse lookup and find the associated hostname. Could you describe the network
set-up on your machines?
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