Sockets gen_tcp:recv/2返回错误,einval
我有一个客户端,它创建N个进程,所有进程都连接到服务器,如下所示:Sockets gen_tcp:recv/2返回错误,einval,sockets,tcp,erlang,otp,gen-tcp,Sockets,Tcp,Erlang,Otp,Gen Tcp,我有一个客户端,它创建N个进程,所有进程都连接到服务器,如下所示: send(State = #state{low = Low, high = Low}) -> NewState = receive_sockets(0, Low, State), NewState; send(State = #state{low = Low}) -> N = Low rem 10, Dest = lists:nth(N + 1, State#state.dest), spa
send(State = #state{low = Low, high = Low}) ->
NewState = receive_sockets(0, Low, State),
NewState;
send(State = #state{low = Low}) ->
N = Low rem 10,
Dest = lists:nth(N + 1, State#state.dest),
spawn(?MODULE, loop, [self(), Dest, Low]),
NewState = State#state{low = Low + 1},
send(NewState).
loop(From, {IP, Port}, Low) ->
case gen_tcp:connect(IP, Port, [binary]) of
{ok, Socket} ->
gen_tcp:send(Socket, integer_to_binary(Low)),
From ! {Low, Socket},
loop1(Socket);
%%timer:sleep(infinity);
_Else ->
io:format("The connection failed ~n"),
loop(From, {IP, Port}, Low)
end.
loop1(Socket) ->
case gen_tcp:recv(Socket, 0) of
{ok, Data} ->
io:format("Received ~n ~p", [Data]),
loop1(Socket);
{error, einval} ->
io:format("error ~n")
end.
我正在创建许多客户端连接。稍后,服务器可能会向我发送一些数据,因此我正在使用gen_tcp:recv/2等待这些数据,但我得到{error,einval}
此外,我在使用插座时是否存在任何问题,因为我观察到插座一经接受就会关闭
有没有关于原因的信息
感谢默认gen_tcp:connect使用活动模式,除非在套接字的选项列表中指定了{active,false},在这种情况下,通过调用recv/2检索数据包。如果您确实希望使用gen_tcp:recv来处理数据,请使用{active,false}。请仔细检查“gen_tcp”手册页,尤其是活动模式相关手册页