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From Andrew Ash <>
Subject Re: Comprehensive Port Configuration reference?
Date Fri, 23 May 2014 15:30:06 GMT
Hi everyone,

I've also been interested in better understanding what ports are used where
and the direction the network connections go.  I've observed a running
cluster and read through code, and came up with the below documentation

Scott and Jacob -- it sounds like you two have pulled together some of this
yourselves for writing firewall rules.  Would you mind taking a look at
this pull request and confirming that it matches your observations?  Wrong
documentation is worse than no documentation, so I'd like to make sure this
is right.


On Wed, May 7, 2014 at 10:19 AM, Mark Baker <> wrote:

> On Tue, May 6, 2014 at 9:09 AM, Jacob Eisinger <> wrote:
> > In a nut shell, Spark opens up a couple of well known ports.  And,then
> the workers and the shell open up dynamic ports for each job.  These
> dynamic ports make securing the Spark network difficult.
> Indeed.
> Judging by the frequency with which this topic arises, this is a
> concern for many (myself included).
> I couldn't find anything in JIRA about it, but I'm curious to know
> whether the Spark team considers this a problem in need of a fix?
> Mark.

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