[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.
Thanks! Erik On 26 May 2010 13:01, Eric Sammer <[email protected]> wrote: > On Wed, May 26, 2010 at 12:38 PM, Erik Test <[email protected]> wrote: > > I confirmed that the hostname for the machine in the /etc/hosts file > points > > to the actual address of the machine and not the local loopback. > > Excellent. > > > However, I see that the ports reported in the log file are not available > in > > the iptables. I'm new to configuring iptables (i.e. I made my first > > configuration changes yesterday) so do I configure the port on the slave > > node as an output chain going to the master node? > > It helps to think of it in terms of the direction the packets flow on > initial connect. In other words, DNs connect to the NN 8020 (or > whatever you've configured) for instance, so you'd open the INPUT > chain for 8020 on the NN. You almost always want to allow related and > established connections. Before making significant changes to iptables > (as you can lock yourself out of a box) you should absolutely become > more familiar with it. Check out http://netfilter.org/ for all of the > details and HOWTOs. > > In the interim, if your Hadoop nodes are on a trusted internal > network, you may want to make sure things work without iptables first, > then add it when you have rules that make sense. > > Regards. > -- > Eric Sammer > phone: +1-917-287-2675 > twitter: esammer > data: www.cloudera.com >
