[erlang-questions] Registered processes:
Sun Mar 25 15:27:51 CEST 2007
On 25 Mar 2007, at 13:27, Fredrik Hoback wrote:
> Hi, I'm new to erlang but I have some questions regarding process
> I have these 2 modules that I want to send messages between with Pid !
> Msg for example. As I start my first module a gen_server (alpha) from
> the shell which spawns away with spawn(?MODULE,start,). It sits
> around waiting for incoming messages. Then also from the same shell I
> start my other module (beta) which begins with register(?MODULE,
> self()). Now when the gen_server receives a message that I want to
> forward to my second module (beta). But I don't get any message, it
> seems that it gets lost on the way. Is there a problem that the beta
> module does a registration after the fact that alpha has already
> started, because I use "beta ! Msg" to send the message from alpha to
One thing to check is that the processes are still running. Using
spawn to start the process doesn't give any indication that a process
A nice way to debug this is first to make sure sasl is running -
Then if you start the gen_servers using the gen_server:start.. API
you will see if the server has died.
And, to answer your specific question, it does not matter when a
process is registered. Once it is registered all other processes in
the same node get access to the name mapping.
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