Having nodes talk to each other.

Louis van der Stam Louis.van.der.Stam@REDACTED
Fri Dec 20 15:10:26 CET 2002

Hello Chandrashekhar,

I ran epmd -debug and on the Tru64 I do not see the "got PORT2_REQ" when I
execute the net_adm:ping('n2@REDACTED'). from the n1 shell.

Any further ideas?

Thanx so far,


-----Original Message-----
From: Chandrashekhar Mullaparthi
Sent: 20 December 2002 14:29
To: 'Louis van der Stam'; erlang-questions@REDACTED
Subject: RE: Having nodes talk to each other.

Check the cookie the nodes are actually using to be really sure.

(abcd@REDACTED)2> erlang:get_cookie().

Make sure they are both the same. You can run epmd in debug mode. Shutdown
your erlang nodes, kill epmd, and start it up again using 

epmd -debug

Then start your erlang shells and see what is happening. 


-----Original Message-----
From: Louis van der Stam [mailto:Louis.van.der.Stam@REDACTED]
Sent: 20 December 2002 13:13
To: erlang-questions@REDACTED
Subject: Having nodes talk to each other.


I have seen messages here concerning the problem I'm having, from the
responses I have read, I conclude my problem is different or is it .....

I'm having difficulty getting two Erlang nodes on the same machine
communicate with each other. net_adm:ping('n1@REDACTED'). fails from n2 and vise
versa. I'm starting the two erlang nodes with '> erl -sname n1' and '> erl
-sname n2' respectively. Before starting I had edited the .erlang.cookie
file in my HOME directory to contain mycookie without quotes. In my
experience this in enough to get two nodes communicating.

The installation where this fails is a Tru64 running R9 (it compiled without
problems). Both nodes create a listen port in the TCP stack, but I never see
a connection being established.

Am I overlooking some simple configuration item or ....?

Is there a switch, ... that instructs erl to write some debuging/traceing
information concerning connections and/or connection attempts and failure


Louis van der Stam

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