Thank you for your quick reply!

we have been able to get the master running, and able to log in to the web
ui and start a slave on the same machine as the master. We also see the
slave appear on the master ui if the slave is running on the same computer.
However when we start a slave on a different machine and try connecting to
the master's spark://<host>:7077 url, it does not show up. log.txt
<http://apache-spark-user-list.1001560.n3.nabble.com/file/n26311/log.txt>  
So we tried setting SPARK_MASTER_IP to the ip address of the master, which
gave use a new master url.

My teammates also sent me the attached logfile. Looking at it myself, the
hostname looks suspicious. It looks like this is a url that references a
locally running master, not one that can be accessed over the web. I might
have to try this out myself and get back to you. Is there a setting that can
dictate whether or not the cluster is run locally? My teammates say no, but,
again, I find this logfile to be sort of suspicious. 



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