Github user kanzhang commented on the pull request:
https://github.com/apache/spark/pull/318#issuecomment-39521708
actually 0.0.0.0 was misleading. the old implementation of
JettyUtils.startJettyServer("0.0.0.0", port, handlers) ignores ip address and
simply uses port number to invoke
val server = new Server(currentPort). when host is not set, Jetty binds to
all interfaces.
This patch reverts back to old behavior, including how logging messages are
handled (they say Jetty is started at host, not 0.0.0.0).
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