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From Doug Cutting <cutt...@apache.org>
Subject Re: Executing hadoop binded on localhost
Date Mon, 11 Sep 2006 16:44:36 GMT
Sylvain Wallez wrote:
> I don't know Hadoop's internals well, but it seems to me that an
> additional configuration could do the trick, e.g.
>     String itfAddr = conf.getString("ipc.server.listen.address")
>     address = (itfAddr == null) ? new InetSocketAddress(port) : new
> InetSocketAddress(itfAddr, port);
> How does that sound?

I'm not sure why you'd want this.  The previously mentioned patch 
addresses the datanode and tasktracker, which must provide an address 
for peers to contact.  The namenode and jobtracker's public address is 
already determined by a config setting.  So, while it is true that these 
daemons listen on all interfaces, they're only contacted on the single 
interface specified in the configuration.

The only reason I can see for the change you suggest (restricting 
daemons to only listen on a single interface) is security: you'd like 
these daemons to not be visible over the private address.  Is that 
indeed your concern?  If so, can this instead be managed with a firewall?


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