[erlang-questions] gen_server noproc when trying to stop

[Serge Aleynikov]

Since you use global registration, you have to address the server in 
this way:

     gen_server:call({global, ?SERVER}, Request).

In order to use the gen_server:call(?SERVER, Request) convention, use 
locally registered servers:

     gen_server:start_link({local, ?SERVER}, ?SERVER, [],[]).


db wrote:
> Can someone tell me why can't stop the gen_server?
> 
> 9> myclnt:start().
> {ok,<0.90.0>}
> 10> myclnt:stop().
> ** exception exit: {noproc,{gen_server,call,[mysrvr,stop]}}
>      in function  gen_server:call/2
> 
> 
> -module(myclnt).
> 
> -export([
>          start/0,
>          stop/0
>         ]).
> 
> -define(SERVER, mysrvr).
> 
> start()->
>     gen_server:start_link({global, ?SERVER}, ?SERVER, [],[]).
> 
> stop()->
>     gen_server:call(?SERVER, stop).
> 
> 
> 
> 
> -module(mysrvr).
> 
> -behaviour(gen_server).
> 
> -export([start_link/0]).
> 
> 
> -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
>          terminate/2, code_change/3]).
> 
> -define(SERVER, ?MODULE).
> 
> start_link() ->
>     gen_server:start_link({global, ?SERVER}, ?MODULE, [], []).
> 
> init([]) ->
>     {ok,some}.
> 
> handle_call({lookup}, _From, State) ->
>     Reply = ok,
>     io:format("_From: ~p State: ~p ~n",[_From, State]),
>     {reply, Reply, State};
> 
> handle_call(stop, _From, State)->
>     io:format("_From: ~p State: ~p ~n",[_From, State]),
>     {stop, normal, stopped, State}.
> 
> handle_cast(_Msg, State) ->
>     {noreply, State}.
> 
> handle_info(_Info, State) ->
>     {noreply, State}.
> 
> terminate(_Reason, _State) ->
>     ok.
> 
> code_change(_OldVsn, State, _Extra) ->
>     {ok, State}.
> 
> Thank you,