I am currently trying to set up a Hadoop distributed compute cluster on my network. Currently. my cluster nodes are encountering a problem communicating with my master server.
Right now I am working on two computers, CLIENT and SERVER.
$ nmap SERVER -p 9000 Starting Nmap 5.21 ( http://nmap.org ) at 2012-05-29 13:16 PDT Nmap scan report for ncoiasi1 (127.0.0.1) Host is up (0.000032s latency). Hostname ncoiasi1 resolves to 2 IPs. Only scanned 127.0.0.1 rDNS record for 127.0.0.1: localhost PORT STATE SERVICE 9000/tcp open cslistener
$ nmap SERVER -p 9000 Starting Nmap 5.21 ( http://nmap.org ) at 2012-05-29 13:16 PDT Nmap scan report for ncoiasi1 (10.23.95.197) Host is up (0.00020s latency). rDNS record for 10.23.95.197: NCOIASI1 PORT STATE SERVICE 9000/tcp closed cslistener
I have done the following things:
- Made sure both machines have an entry in /etc/hosts, and put ALL:ALL in the /etc/hosts.allow on both machines
- Disabled the firewall on both machines (safe to do since I am behind a stringent corporate firewall)
lsofto verify that the correct process is listening on 9000.
Any help would be appreciated; I know it's just some configuration I've forgotten somewhere, but I can't find where.