Hi. Shouldn't you be testing connecting _from_ the datanode? The error you > posted is while this DN is trying connect to another DN.
You might be into something here indeed: 1) Telnet to 192.168.253.20 8020 / 192.168.253.20 50010 works 2) Telnet to localhost 8020 / localhost 50010 doesn't work 3) Telnet to 127.0.0.1 8020 / 127.0.0.1 50010 doesn't work In the 2 last cases I get: Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Connection refused telnet: Unable to connect to remote host: Connection refused Could it be related? Regards.