blocks|key|267960|text|我不是一名Erlang程序员，仅从exit+(here)的文档中可以看出，exit需要一个进程id作为第一个参数，而您向它传递的是一个原子(?SERVER)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|267961|试一试|267962|exit(whereis(?SERVER),+ok).|code-block|syntax|javascript|267963|相反(参见here，whereis返回与名称相关联的进程id+)|267964|entityMap|0|LINK|mutability|MUTABLE|url|http://www.erlang.org/doc/man/erlang.html#exit-2|1|http://www.erlang.org/doc/reference_manual/processes.html^0|H|4|11|4|1Y|7|N|4|0|0|0|0|A|7|5|4|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|F|3|G|5|6|7|18|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|19|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@$9|1D|A|1E|1|1F]]|E|$]]|$1|O|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]]]

Not being an Erlang programmer and just from the documentation of <code>exit</code> (<a href="http://www.erlang.org/doc/man/erlang.html#exit-2">here</a>), I'd say, that <code>exit</code> requires a process id as first argument whereas you are passing an atom (<code>?SERVER</code>) to it.

Try

<pre><code>exit(whereis(?SERVER), ok).
</code></pre>

instead (<code>whereis</code> returns the process id associated with a name, see <a href="http://www.erlang.org/doc/reference_manual/processes.html">here</a>)

blocks|key|267984|text|正如@MartinStettner指出的那样，您需要更改对exit/2的调用。该进程停止的原因是您已经使用spawn_link启动了该进程。然后将您的进程链接到shell进程。当您调用mrtask_net:stop()时，该错误导致shell进程崩溃，然后在它们链接时导致您的进程崩溃。然后会自动启动一个新的shell进程，以便您可以继续使用该shell。您通常希望使用spawn_link启动服务器，但当您从shell测试它们时，它们“碰巧”就死了，这可能会导致混淆。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|267985|entityMap^0|T|6|1H|A|2K|H|55|A|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

You need to change the call to <code>exit/2</code> as @MartinStettner has pointed out. The reason the process stops anyway is that you have started it with <code>spawn_link</code>. Your process is then linked to the shell process. When you called <code>mrtask_net:stop()</code> the error caused the shell process to crash which then caused your process to crash as they were linked. A new shell process is then automatically started so you can keep working with the shell. You generally do want to start your servers with <code>spawn_link</code> but it can cause confusion when your are testing them from the shell and they just "happen" to die.

blocks|key|2860805|text|我建议你坚持使用OTP。它真的给你带来了很多好处(我很难想象OTP不会受益的情况)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2860806|因此，如果您想在动态口令中停止进程，您应该对gen_server执行如下操作|offset|length|style|CODE|2860807|%25+process1.erl
%25+In+case+you+get+cast+message+{stopme,+Message}
handle_cast({stopme,+Message},+State)+->
++++%25+you+will+stop
++++{stop,+normal,+State}
handle_cast(Msg,+State)+->
++++%25+do+your+stuff+here+with+msg
++++{noreply,+State}.

%25+process2.erl
%25+Here+the+code+to+stop+process1
gen_server:cast(Pid,+{stopme,+"It's+time+to+stop!"}),|code-block|syntax|javascript|2860808|有关它的更多信息，请单击此处：http://www.erlang.org/doc/man/gen_server.html|2860809|entityMap|0|LINK|mutability|MUTABLE|url|http://www.erlang.org/doc/man/gen_server.html^0|0|M|A|0|0|F|19|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|11|8|@]|9|@$D|12|E|13|1|14]]|A|$]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

I would suggest you to stick with OTP. It really gives you tons of advantages (I hardly can immagine the case where OTP doesn't benefit).

So, if you want to stop process in OTP you should do something like this for <code>gen_server</code>:

<pre><code>% process1.erl
% In case you get cast message {stopme, Message}
handle_cast({stopme, Message}, State) -&gt;
 % you will stop
 {stop, normal, State}
handle_cast(Msg, State) -&gt;
 % do your stuff here with msg
 {noreply, State}.

% process2.erl
% Here the code to stop process1
gen_server:cast(Pid, {stopme, "It's time to stop!"}),
</code></pre>

More about it you can find here: <a href="http://www.erlang.org/doc/man/gen_server.html" rel="nofollow">http://www.erlang.org/doc/man/gen_server.html</a>

Good day, i have following setup for my little service:

<pre><code>-module(mrtask_net).

-export([start/0, stop/0, listen/1]).

-define(SERVER, mrtask_net).

start() -&gt;
 Pid = spawn_link(fun() -&gt; ?MODULE:listen(4488) end),
 register(?SERVER, Pid),
 Pid.

stop() -&gt;
 exit(?SERVER, ok).

....
</code></pre>

And here is the repl excerpt:

<pre><code>(emacs@rover)83&gt; mrtask_net:start().
&lt;0.445.0&gt;
(emacs@rover)84&gt; mrtask_net:stop().
** exception error: bad argument
 in function exit/2
 called as exit(mrtask_net,ok)
 in call from mrtask_net:stop/0
(emacs@rover)85&gt; 
</code></pre>

As you see, stopping process produces error, process is stopping though.
What does this error mean and how to make thing clean ?

Erlang. Correct way to stop process

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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日安，我为我的小服务做了以下设置：-module(mrtask_net).-export([start/0, stop/0, listen/1]).-define(SERVER, mrtask_net).start() ->    Pid = spawn_link(fun() -> ?MODULE:listen(448...

问艾朗。停止进程的正确方法
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