[jira] [Created] (SPARK-1903) Document Spark's network connections

[Andrew Ash (JIRA)]

Andrew Ash created SPARK-1903:
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             Summary: Document Spark's network connections
                 Key: SPARK-1903
                 URL: https://issues.apache.org/jira/browse/SPARK-1903
             Project: Spark
          Issue Type: Documentation
          Components: Documentation
    Affects Versions: 1.0.0
            Reporter: Andrew Ash


For people who want to apply strict firewalls to the Spark cluster, knowing 
when and why what JVMs connect to what other JVMs on what ports would be super 
valuable.



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