[erlang-questions] The node (with release using ssl) does not shut down after calling init:stop/0 in Erlang 17.3

[Ingela Andin]

Hi!

If you apply the following patch to 17.3 it might help. The
SNI-contribution that we included in this release had missed the detail,
that the server may optionally send a
SNI-extension that must be empty.

diff --git a/lib/ssl/src/ssl_handshake.
erl b/lib/ssl/src/ssl_handshake.erl
index 22673e4..eee33ef 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -1732,6 +1732,9 @@
dec_hello_extensions(<<?UINT16(?EC_POINT_FORMATS_EXT), ?UINT16(Len),
                             #ec_point_formats{ec_point_format_list =
                                           ECPointFormats}});

+dec_hello_extensions(<<?UINT16(?SNI_EXT), ?UINT16(Len), Rest/binary>>,
Acc) when Len == 0 ->
+    dec_hello_extensions(Rest, Acc#hello_extensions{sni = ""}); %% Server
may send an empy SNI
+
 dec_hello_extensions(<<?UINT16(?SNI_EXT), ?UINT16(Len),
                 ExtData:Len/binary, Rest/binary>>, Acc) ->
     <<?UINT16(_), NameList/binary>> = ExtData,


2014-09-30 16:10 GMT+02:00 a a <tauceti100@REDACTED>:

> Hello,
>
> I use Erlang 17.3 downloaded from
> https://www.erlang-solutions.com/downloads/download-erlang-otp
>
> When I am trying to stop the ssl_hello_world example from cowboy I have
> encountered a strange behaviour.
>
> $ git clone https://github.com/ninenines/cowboy
> $ cd cowboy
> $ git checkout 1.0.0
> $ cd examples/ssl_hello_world
> $ make
> $ ./_rel/ssl_hello_world_example/bin/ssl_hello_world_example console
>
> Erlang/OTP 17 [erts-6.2] [source-5c974be] [64-bit] [smp:4:4]
> [async-threads:10] [hipe] [kernel-poll:false]
>
> Eshell V6.2  (abort with ^G)
> (ssl_hello_world_example@REDACTED)1> application:which_applications().
> [{ssl_hello_world,"Cowboy Hello World example with SSL.",
>                             "1"},
>  {ssl,"Erlang/OTP SSL application","5.3.6"},
>  {cowboy,"Small, fast, modular HTTP server.","1.0.0"},
>  {cowlib,"Support library for manipulating Web protocols.",
>              "1.0.0"},
>  {public_key,"Public key infrastructure","0.22.1"},
>  {crypto,"CRYPTO","3.4.1"},
>  {ranch,"Socket acceptor pool for TCP protocols.","1.0.0"},
>  {asn1,"The Erlang ASN1 compiler version 3.0.2","3.0.2"},
>  {stdlib,"ERTS  CXC 138 10","2.2"},
>  {kernel,"ERTS  CXC 138 10","3.0.3"}]
> (ssl_hello_world_example@REDACTED)2> init:stop().
> ok
> (ssl_hello_world_example@REDACTED)3>
> =ERROR REPORT==== 29-Sep-2014::16:49:15 ===
> Error in process <0.69.0> on node 'ssl_hello_world_example@REDACTED'
> with exit value:
> {{case_clause,{error,closed}},[{ranch_acceptor,loop,3,[{file,"src/ranch_acceptor.erl"},{line,28}]}]}
> ...
> =ERROR REPORT==== 29-Sep-2014::16:49:15 ===
> Error in process <0.164.0> on node 'ssl_hello_world_example@REDACTED'
> with exit value:
> {{case_clause,{error,closed}},[{ranch_acceptor,loop,3,[{file,"src/ranch_acceptor.erl"},{line,28}]}]}
>
> The listener socket has been closed.
> It seems the node is still running, but:
>
> (ssl_hello_world_example@REDACTED)3> application:which_applications().
> ** exception exit: {timeout,{gen_server,call,
>
> [application_controller,which_applications]}}
>         in function  gen_server:call/2 (gen_server.erl, line 182)
>
> If I change this line
> https://github.com/ninenines/ranch/blob/1.0.0/src/ranch_acceptor.erl#L40
> to
>      {error, _Reason} -> ok
> the acceptor processes do not crash after calling init:stop/0, and the
> node shuts down correctly.
>
> This behavour appears only in Erlang 17.3 (I have tried it in Debian 7.6,
> Ubuntu 12.04.5, OS X 10.9.5). In Erlang R16B03 everything seems to work
> correctly.
>
> What else can I do to reveal the cause of this issue?
>
> _______________________________________________
> erlang-questions mailing list
> erlang-questions@REDACTED
> http://erlang.org/mailman/listinfo/erlang-questions
>
>
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