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erlangdistributeddistributed-computing

Can't get two Erlang nodes to communicate

No matter what I try, I can't get two different nodes to communicate. This is probably a very simple problem to solve.

I have created the file .cookie.erlang and I've placed it into my home directory. Then I open a terminal window and type the following commands:

erl -sname user1@pc
erlang:set_cookie(node(),cookie).

In another terminal window I type:

erl -sname user2@pc
erlang:set_cookie(node(),cookie).

Now if I type the following command in the first terminal window:

net_adm:ping(user2@pc).

I always get "false" as result, meaning that the two nodes were not able to connect to each other. I don't understand what I am missing here...

Solution

  • Definitely make sure that 'pc' is the actual hostname of your machine. If it's not, make sure you're using that.

    Alternatively, since you're using sname and both hosts are on the same machine, you could get away with doing erl -sname user1 and erl -sname user2.