英文:
Process.exit(pid, :not_kill_reason) doesn't call handle_info({:EXIT, pid, reason},state)
问题
抱歉，你的内容已经被翻译如下：
EDIT：我完全错了。这个GenServer示例没有意义，因为真正的代码有点复杂（一个启动GenServer并运行任务的GenServer等等），原来我退出了错误的进程，弄乱了日志。抱歉。
我有一个带有退出陷阱的GenServer。如果我调用 Process.exit(pid, :kill)，回调 handle_info 会被调用，但如果是其他原因，回调 不会被调用。
简化的GenServer
defmodule Example do
use GenServer
def start(args, opts \\ []) do
GenServer.start(__MODULE__, args, opts)
end
def init({task, meta}) do
Process.flag(:trap_exit, true)
end
def kill do
Process.exit(self, :not_kill_reason)
end
def handle_info({:EXIT, pid, reason}, state) do
IO.puts("handle_info，原因: #{reason}")
{:stop, :normal, nil}
end
end
我认为我漏掉了一些东西，根据文档：
https://hexdocs.pm/elixir/1.12/Process.html#exit/2
如果pid正在捕获退出，退出信号将转换为消息 {:EXIT, from, reason} 并传递给pid的消息队列。
如果原因是原子 :kill，也就是如果调用 Process.exit(pid, :kill)，则会向pid发送不可捕获的退出信号，pid将无条件退出，原因是 :killed。
所以，不知何故，我成功地使其在相反的情况下工作，:exit 触发 handle_info 但 :not_kill_reason 不触发:/
英文:
EDIT: I was totally wrong.. this GenServer Example doesn't make sense since the real code is a little bit more complex (a GenServer that starts GenServers that runs tasks etc..), It turns out i was exiting the wrong process and messed it up with the logs. Sorry.
I have a GenServer with an exit trap.. If I call Process.exit(pid, :kill) the callback handle_info is called, but if it is another reason the callback is never called
Simplified GenServer
defmodule Example do
use GenServer
def start(args, opts \\ []) do
GenServer.start(__MODULE__, args, opts)
end
def init({task, meta}) do
Process.flag(:trap_exit, true)
end
def kill do
Process.exit(self, :not_kill_reason)
end
def handle_info({:EXIT, pid, reason}, state) do
IO.puts("handle_info, reason: #{reason}")
{:stop, :normal, nil}
end
end
I think I'm missing something, following the docs:
https://hexdocs.pm/elixir/1.12/Process.html#exit/2
If pid is trapping exits, the exit signal is transformed into a message {:EXIT, from, reason} and delivered to the message queue of pid.
If reason is the atom :kill, that is if Process.exit(pid, :kill) is called, an untrappable exit signal is sent to pid which will unconditionally exit with reason :killed.
So.. somehow I managed to make it work in reverse, :exit triggers handle_info but :not_kill_reason doesn´t :/
答案1
得分: 2
请努力提供一个可行的示例。
当您调用 Example.kill/0 时，它会终止调用它的进程，而不是您的 GenServer。
英文:
Please make an effort to provide a working example.
When you call Example.kill/0, it is killing the calling process, not your GenServer.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论