[erlang-questions] Ranch + SSL = crash during init:stop/0

[silver.buddy@REDACTED]

Hello,

Look at this https://github.com/ninenines/ranch/issues/90

On 25/01/15 20:28, e@REDACTED wrote:
> Hello.
> I have a well localized problem with Ranch that raises several basic
> questions about OTP, which i need to understand in order to solve the
> problem.
>
> i have got the following applications running on a single isolated node:
>
> 1> application:which_applications().
>
> [{online37,"My Application","0.1.0"},
>   {cowboy,"Small, fast, modular HTTP server.","1.0.0"},
>   {ssl,"Erlang/OTP SSL application","5.3.6"},
>   {public_key,"Public key infrastructure","0.22.1"},
>   {cowlib,"Support library for manipulating Web protocols.",
>           "1.0.0"},
>   {mnesia,"MNESIA  CXC 138 12","4.12.3"},
>   {crypto,"CRYPTO","3.4.1"},
>   {asn1,"The Erlang ASN1 compiler version 3.0.2","3.0.2"},
>   {ranch,"Socket acceptor pool for TCP protocols.","1.0.0"},
>   {stdlib,"ERTS  CXC 138 10","2.2"},
>   {kernel,"ERTS  CXC 138 10","3.0.3"}]
>
>
> Q1: does this list represent the starting order of these applications
> listed?
>
> Q2: may i deduce from this list that 'ssl' will be stopped before
> 'ranch'? (should be called init:stop/0)
>
>
> the main problem is that during init:stop/0
> 'ranch' *DELIBERATELY* crashes with the reason: "socket closed"
> (in src/ranch_acceptor.erl:28)
> (which in my opinion most probably is caused by preliminary shut down of
> 'ssl')
>
>
> Q3: am i right in respect of 'ranch' that 'ssl' shall not be stopped
> before 'ranch'?
>
>
> my .app.src file (which corresponds to the applications listing above) is:
>
> {application, online37, [
>      {description, "My Application"},
>      {vsn, "0.1.0"},
>      {modules, []},
>      {registered, []},
>      {applications, [
>          kernel,
>          stdlib,
>          ssl,
>          mnesia,
>          cowboy
>      ]},
>      {mod, {online37_app, []}},
>      {env, []}
> ]}.
>
>
> Q4: how could i affect the starting order of the applications? (provided
> i am using erlang.mk + relx)