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I'm trying to run MPI programs on 8 machines, but I get the error

connect to address 127.0.0.1 port 544: Connection refused
Trying krb4 rsh...
connect to address 127.0.0.1 port 544: Connection refused
trying normal rsh (/usr/bin/rsh)
lagrid02: Connection refused

When I run it with a machinefile option, I get the error lagrid03: No route to host where lagrid03 is the neighbouring node connected to master node.

How should I rectify this ?

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1 Answer 1

connect to address 127.0.0.1 port 544: Connection refused

Are you running RSH? (Why aren't you using MPI with SSH?)

No route to host where lagrid03

Do you have a route to it? Can you ping lagrid03 and get replies?

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Thanks for the reply.. yes I can ping lagrid03 and get a reply. I re-installed MPICH configured to run with ssh . also ran lagrid02: env RSHCOMMAND=ssh mpirun -np 4 a.out and I got lagrid02 connection refused p0_14201: p4_error: Child process exited while making connection to remote process on lagrid02: 0 FYI, lagrid02 is the Master node –  kashyapa Aug 19 '11 at 21:02

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