Github user marsishandsome commented on the pull request:
https://github.com/apache/spark/pull/5095#issuecomment-85533219
@tgravescs Yes, DNS in our network is not properly configured.
The yarn-node cannot connect to the client by the hostname of the client
machine.
My idea is to let the yarn-node use the client's ip address to connect to
the client machine.
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