Connection Websocket upgrade failed

[tidusIO]

Since switching to the latest master I get following repeating error when starting my application. This happens in Google Cloud and my local macOS system as well.

[info] WAITING 128 BEFORE NEXT SHARD CONNECT
[debug] Upgrading connection to websocket
[debug] Shard connection up, waiting for consumers to boot
[error] ** State machine <0.1213.0> terminating
** Last event = {info,{gun_upgrade,<0.1214.0>,
                                   #Ref<0.2030176606.2015625217.39321>,
                                   [<<"websocket">>],
                                   [{<<"date">>,
                                     <<"Wed, 18 Oct 2023 17:26:32 GMT">>},
                                    {<<"connection">>,<<"upgrade">>},
                                    {<<"sec-websocket-accept">>,
                                     <<"XTX4ZupV6bXSO3Txkhavuwd22D4=">>},
                                    {<<"upgrade">>,<<"websocket">>},
                                    {<<"cf-cache-status">>,<<"DYNAMIC">>},
                                    {<<"report-to">>,
                                     <<"{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=RQzrHe90NXM3fNbUxzSRVnVs9hWpdOGipWPR%2FBbWQL%2BA0v267FBgfcViDC85WxoAzwtevd6xku7G2UhJJYhbqBLKsfvpW%2FI53iGlAy8Ujy1LUnaEV0YPiRmiJmv9nk4IpK8n4w%3D%3D\"}],\"group\":\"cf-nel\",\"max_age\":604800}">>},
                                    {<<"nel">>,
                                     <<"{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}">>},
                                    {<<"strict-transport-security">>,
                                     <<"max-age=31536000; includeSubDomains; preload">>},
                                    {<<"x-content-type-options">>,
                                     <<"nosniff">>},
                                    {<<"server">>,<<"cloudflare">>},
                                    {<<"cf-ray">>,
                                     <<"81827ca38dca9325-ICN">>}]}}
** When server state  = {connecting_ws,
                            #{stream => #Ref<0.2030176606.2015625217.39321>,
                              seq => nil,
                              '__struct__' => 'Elixir.Nostrum.Struct.WSState',
                              session => nil,conn => <0.1214.0>,
                              gateway => <<"gateway.discord.gg">>,
                              last_heartbeat_ack => nil,
                              last_heartbeat_send => nil,
                              heartbeat_interval => nil,shard_num => 0,
                              heartbeat_ack => nil,zlib_ctx => nil,
                              resume_gateway => nil,conn_pid => <0.1213.0>,
                              total_shards => 1}}
** Reason for termination = error:{badmatch,timeout}
** Callback modules = ['Elixir.Nostrum.Shard.Session']
** Callback mode = [state_functions,state_enter]
** Stacktrace =
**  [{'Elixir.Nostrum.Shard.Session',connected,3,
                                     [{file,"lib/nostrum/shard/session.ex"},
                                      {line,239}]},
     {gen_statem,loop_state_callback,11,[{file,"gen_statem.erl"},{line,1377}]},
     {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,241}]}]
** Time-outs: {1,[{state_timeout,upgrade_timeout}]}```

[tidusIO]

Alright, I found my issue. I didn't have any consumers, because I just use HTTP Requests and don't need to listen to any events. Maybe it would be helpful if there is any check before if there are any consumers or not before running in "timeout".

[kiddoshainingu]

Alright, I found my issue. I didn't have any consumers, because I just use HTTP Requests and don't need to listen to any events. Maybe it would be helpful if there is any check before if there are any consumers or not before running in "timeout".

How did you manage to bypass the error?
I am in a similar case as you and for some reason, I am now running into that error and don't know how to solve it 😅

[jb3]

@kiddoshainingu on Nostrum latest, the error should change now into something like "No consumers were running nor did any start up in time...".

I'd advise you to just spin up a dummy consumer for this purpose, just something like ```elixir
defmodule MyBot.DummyConsumer do
use Nostrum.Consumer
end

Then as long as that gets started by a supervisor when Nostrum starts, things should be fine.

[kiddoshainingu]

@jb3 Thank you very much ! Problem solved. 🙏🏾