Probably as it’s only generating the web part. This might be worth adding an issue about, so the mix task can tell people that they need to add pubsub.
LostKobrakai
blset
josefrichter
I would like to add this here for future reference:
I ran into this problem while going thru Programming Phoenix 1.4 book, Chapter 11, section Extracting Rumbl and RumblWeb, page 238 very bottom.
The error encountered is this (adding to be google-able):
** (Mix) Could not start application rumbl_web: RumblWeb.Application.start(:normal, []) returned an error: shutdown: failed to start child: RumblWeb.Presence
** (EXIT) shutdown: failed to start child: Phoenix.Presence.Tracker
** (EXIT) shutdown: failed to start child: RumblWeb.Presence_shard0
** (EXIT) an exception was raised:
** (ArgumentError) unknown registry: RumblWeb.PubSub
...
The exact solution based on this thread seems to be editing /rumbl_umbrella/apps/rumbl/lib/rumbl/application.ex so that the children there are:
children = [
Rumbl.Repo,
{Phoenix.PubSub, name: Rumbl.PubSub}, # added missing piece
]
The file /rumbl_umbrella/config/config.exs says that the pub_sub server for rumbl_web is this
config :rumbl_web, RumblWeb.Endpoint,
...
pubsub_server: Rumbl.PubSub,
...
so then I also changed /rumbl_umbrella/apps/rumbl_web/lib/rumbl_web/channels/presence.ex so that it starts with
use Phoenix.Presence,
otp_app: :rumbl_web,
pubsub_server: Rumbl.PubSub
Upon all these changes it seems to work (despite having some “connection refused” messages in console). Long story short, seems like one needs Rumbl.PubSub consistently everywhere.
Hope this helps somebody.
11
Thomas-Sciaroni
In addition to what Jose mentioned, I also needed to update the children in
./rumbl_umbrella/apps/rumbl_web/lib/rumbl_web/application.ex
by adding
children = [
...
RumbWeb.Presence
]
otherwise I was getting the error:
[error] GenServer #PID<{PID}> terminating
** (ArgumentError) argument error
(stdlib 3.13) :ets.lookup(RumblWeb.Presence, :pool_size)
(phoenix_pubsub 2.0.0) lib/phoenix/tracker.ex:311: Phoenix.Tracker.pool_size/1
(phoenix_pubsub 2.0.0) lib/phoenix/tracker.ex:240: Phoenix.Tracker.list/2
(phoenix 1.5.6) lib/phoenix/presence.ex:401: Phoenix.Presence.list/2
(rumbl_web 0.1.0) lib/rumbl_web/channels/video_channel.ex:40: RumblWeb.VideoChannel.handle_info/2
(phoenix 1.5.6) lib/phoenix/channel/server.ex:344: Phoenix.Channel.Server.handle_info/2
(stdlib 3.13) gen_server.erl:680: :gen_server.try_dispatch/4
(stdlib 3.13) gen_server.erl:756: :gen_server.handle_msg/6
(stdlib 3.13) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: :after_join
State: %Phoenix.Socket{assigns: %{user_id: ...
...}
1
januarvs
This is exactly what I need.
Note: I didn’t encounter “connection refused” message in the console.
1
josefrichter