[erlang-questions] How can i evaluate gen_server:call/cast cross nodes?

Ulf Wiger (TN/EAB) <>
Wed Apr 2 08:41:04 CEST 2008


State#state.authsrv contains {<5661.50.0>}, which is of
type {pid()}.

The gen_server:call/2 function expects the following
type of the first argument:

ServerRef = Name | {Name,Node} | {global,GlobalName} | pid()
  Node = atom()
  GlobalName = term()

(... and Name = atom(), one might add.)

BR,
Ulf W

wenew zhang skrev:
> It's  works  on erl shell:
> 
>  Pid=global:whereis_name(authserver).
> <5661.50.0>
> ( 
> <mailto:>)5> 
> Uid=list_to_binary("root").
> <<"root">>
> ( 
> <mailto:>)6> 
> Pwd=list_to_binary("12345").
> <<"12345">>
> ( 
> <mailto:>)12> 
> Result=gen_server:call(Pid,{213,Uid,Pwd}).
> 0%% the normal result
> 
> Code examples:
>             io:format("rcv:~w AuthPid~w ~n",[Data,State#state.authsrv]),
>             %global:sync(),
>             
> Result=gen_server:cast(State#state.authsrv,{?PLLOGIN,Uid,Pwd}),  %%even 
> no data send to the authsrv,
>             io:format("Result:~w~n",[Result]),
> 
> Error Mesage:________________begin_________________________________________
> rcv:<<0,4,97,115,100,102,0,5,115,97,102,115,100>> AuthPid{<5661.50.0>}   
> %% the authsrv Pid
> =ERROR REPORT==== 2-Apr-2008::08:02:35 ===
> ** State machine <0.58.0> terminating
> ** Last message in was {tcp,#Port<0.115>,
>                             <<0,6,97,97,115,97,97,97,0,5,98,98,98,98,98>>}
> ** When State == 'WAIT_FOR_DATA'
> **      Data  == {state,#Port<0.115>,{192,168,0,221},{<5661.62.0>}}
> ** Reason for termination =
> ** {{function_clause,[{gen,call,
>                            [{<5661.62.0>},
>                             '$gen_call',
>                             {213,<<"aasaaa">>,<<"bbbbb">>},
>                             5000]},
>                       {gen_server,call,2},
>                       {indexserver,'WAIT_FOR_DATA',2},
>                       {gen_fsm,handle_msg,7},
>                       {proc_lib,init_p,5}]},
>     {gen_server,call,
>                 [{<5661.62.0>},{213,<<"aasaaa">>,<<"bbbbb">>}]}}
> _______________end________________________________
> What's problem with it?
> 
> Best Regards
> 
> Wenew Zhang
> 
> 
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> 
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