[GitHub] spark pull request: [SPARK-4799] Use IP address instead of local h...

[nikonyrh <gi...@git.apache.org>]

Github user nikonyrh commented on the pull request:

    https://github.com/apache/spark/pull/3645#issuecomment-142319031
  
    Hi, I would like to understand why slaves use SPARK_LOCAL_IP instead of SPARK_PUBLIC_DNS when talking to other slaves? It is also shown on "Address" column of Workers table on Spark Master UI.
    
    Earlier I thought that I could have SPARK_LOCAL_IP be the docker container's ip and SPARK_PUBLIC_DNS match host's ip, and with port forwarding other nodes and the driver are able to talk to slaves run inside containers. In this context the internal address isn't accessible except from the container's host OS.


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