关机：无法启动子：在凤凰城/药剂

Question

MyApp.Endpoint在我的凤凰应用程序我有一个服务器上的这个错误，在当地当我跑步凤凰控制台：

[info] Application MyApp exited: MyApp.start(:normal, []) returned an error: shutdown: failed to start child: MyApp.Endpoint 
    ** (EXIT) already started: #PID<0.1012.0> 
{"Kernel pid terminated",application_controller,"{application_start_failure,MyApp,{{shutdown, 
{failed_to_start_child,'Elixir.MyApp.Endpoint', 
{already_started,<0.1012.0>}}},{'Elixir.MyApp',start,[normal,[]]}}}"} 

Crash dump is being written to: erl_crash.dump...done 
Kernel pid terminated (application_controller) ({application_start_failure,MyApp,{{shutdown,{failed_to_start_child,'Elixir.MyApp.Endpoint',{already_started,<0.1012.0>}}},{'Elixir.MyApp',start,[no.... 

什么是关于？如何解决它？

UPDATE：

下面是完整的混淆堆栈跟踪：

$ ./bin/my_app console  
Using /home/my_name/my_app_com_webite2/releases/0.0.2/my_app.sh 
Exec: /home/my_name/my_app_com_webite2/erts-7.3.1/bin/erlexec -boot /home/my_name/my_app_com_webite2/releases/0.0.2/my_app -mode embedded -config /home/my_name/my_app_com_webite2/running-config/sys.config -boot_var ERTS_LIB_DIR /home/my_name/my_app_com_webite2/erts-7.3.1/../lib -env ERL_LIBS /home/my_name/my_app_com_webite2/lib -pa /home/my_name/my_app_com_webite2/lib/my_app-0.0.2/consolidated -args_file /home/my_name/my_app_com_webite2/running-config/vm.args -user Elixir.IEx.CLI -extra --no-halt +iex -- console 
Root: /home/my_name/my_app_com_webite2 
/home/my_name/my_app_com_webite2 
Erlang/OTP 18 [erts-7.3.1] [source] [64-bit] [async-threads:10] [hipe] [kernel-poll:false] 

[info] Application my_app exited: my_app.start(:normal, []) returned an error: shutdown: failed to start child: my_app.Endpoint 
    ** (EXIT) already started: #PID<0.1012.0> 
{"Kernel pid terminated",application_controller,"{application_start_failure,my_app,{{shutdown,{failed_to_start_child,'Elixir.my_app.Endpoint',{already_started,<0.1012.0>}}},{'Elixir.my_app',start,[normal,[]]}}}"} 

Crash dump is being written to: erl_crash.dump...done 
Kernel pid terminated (application_controller) ({application_start_failure,my_app,{{shutdown,{failed_to_start_child,'Elixir.my_app.Endpoint',{already_started,<0.1012.0>}}},{'Elixir.my_app',start,[no 

我创造了释放它通过mix clean, compile, release。

UPDATE2：

# lib/my_app 
defmodule MyApp123 do 
    use Application 

    # See http://elixir-lang.org/docs/stable/elixir/Application.html 
    # for more information on OTP Applications 
    def start(_type, _args) do 
    import Supervisor.Spec, warn: false 

    children = [ 
     supervisor(MyApp123.Endpoint, []), 
     supervisor(MyApp123.Repo, []), 
    ] 


    # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html 
    # for other strategies and supported options 
    opts = [strategy: :one_for_one, name: MyApp123.Supervisor] 
    Supervisor.start_link(children, opts) 
    end 

    # Tell Phoenix to update the endpoint configuration 
    # whenever the application is updated. 
    def config_change(changed, _new, removed) do 
    MyApp123.Endpoint.config_change(changed, removed) 
    :ok 
    end 
end 

Answer 1

这意味着，你可能开始MyApp.Endpoint手动地方。在你的lib/my_app.ex里面应该有这样一段代码。

children = [ 
    # Start the endpoint when the application starts 
    supervisor(MyApp.Endpoint, []), 
    # Start the Ecto repository 
    supervisor(MyApp.Repo, []), 
    # Here you could define other workers and supervisors as children 
    # worker(MyApp.Worker, [arg1, arg2, arg3]), 
] 

该代码表示​​开始MyApp需要开始Endpoint。监督树对订单非常严格。他们需要监视已启动的进程，因此如果其他人启动该进程，则会返回错误。这会关闭MyApp和整个虚拟机，因为没有主应用程序就无法运行它。尝试寻找代码中的某个地方的Endpoint.start调用。