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RSH connection problem while running MPI program

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Top Forums Shell Programming and Scripting RSH connection problem while running MPI program
# 1  
Old 08-19-2011
RSH connection problem while running MPI program
I'm trying to run MPI programs on 8 machines, but I get the error

Code:
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
Code:
lagrid03: No route to host

where lagrid03 is the neighbouring node connected to master node.

How should I rectify this ?
# 2  
Old 08-19-2011
What OS are you trying to run these MPI programs on? paste output from

Code:
uname -spr

# 3  
Old 08-19-2011
Using Centos 5
uname -spr gives
Linux 2.6.18-238.12.1.el5xen x86_64
# 4  
Old 08-19-2011
Try this URL and see if it helps you

Code:
http://www.open-mpi.org/faq/?category=rsh


Plus, can you try this on the shell:

Code:
telnet localhost 544

also post output from

Code:
netstat -apn|grep -w 544|grep LISTEN

Post output from

Code:
iptables -L

Last edited by dude2cool; 08-19-2011 at 05:32 PM..
# 5  
Old 08-19-2011
Code:
telnet localhost 544
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain 
ACCEPT     udp  --  anywhere             anywhere            udp dpt:bootps 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:bootps 
RH-Firewall-1-INPUT  all  --  anywhere             anywhere            

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             192.168.122.0/24    state RELATED,ESTABLISHED 
ACCEPT     all  --  192.168.122.0/24     anywhere            
ACCEPT     all  --  anywhere             anywhere            
REJECT     all  --  anywhere             anywhere            reject-with icmp-port-unreachable 
REJECT     all  --  anywhere             anywhere            reject-with icmp-port-unreachable 
RH-Firewall-1-INPUT  all  --  anywhere             anywhere            

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain RH-Firewall-1-INPUT (2 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     icmp --  anywhere             anywhere            icmp any 
ACCEPT     esp  --  anywhere             anywhere            
ACCEPT     ah   --  anywhere             anywhere            
ACCEPT     udp  --  anywhere             224.0.0.251         udp dpt:mdns 
ACCEPT     udp  --  anywhere             anywhere            udp dpt:ipp 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ipp 
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            state NEW tcp dpt:ssh 
REJECT     all  --  anywhere             anywhere            reject-with icmp-host-prohibited

# 6  
Old 08-19-2011
Do you need iptables? if not just disabling it will be the simplest solution.

chkconfig disable iptables

And

service iptables stop

Try telnet to port 544 after disabling iptables.
# 7  
Old 08-19-2011
I used iptables because I had to connect the machine in the internal network to the internet through a gateway.
Is there any round about method which might not require me to disable iptables ?
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