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From Allen Wittenauer <awittena...@linkedin.com>
Subject Re: TaskTracker and DataNodes cannot connect to master node (NoRouteToHostException)
Date Wed, 26 May 2010 19:27:23 GMT

On May 26, 2010, at 10:12 AM, Erik Test wrote:

> [PROBLEM SOLVED]
> 
> I'm running on an internal network so I shutdown the iptables on two
> internal nodes. I was able to run a node as a slave and another as a master.
> 

Hadoop has a very bad tendency towards opening up random ephemeral ports and expecting to
serve content off of them.  Your best bet is to allow all connections between Hadoop nodes
and likely any clients.
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