Starting a container in Async block fails #44
Description
Hi, @ioquatix.
Starting a container from Async block fails after container instance block completion or on first async code encounter.
app % irb
3.3.6 :001 > require 'async'
=> true
3.3.6 :002 > require 'async/container'
=> true
3.3.6 :003 > class Controller < Async::Container::Controller
3.3.6 :004 > def create_container
3.3.6 :005 > Async::Container::Forked.new
3.3.6 :006 > # or Async::Container::Threaded.new
3.3.6 :007 > # or Async::Container::Hybrid.new
3.3.6 :008 > end
3.3.6 :009 >
3.3.6 :010 > def setup(container)
3.3.6 :011 > container.run count: 1, restart: false do |instance|
3.3.6 :012 > p 'ohai'
3.3.6 :013 > end
3.3.6 :014 > end
3.3.6 :015 > end
=> :setup
3.3.6 :016 > Controller.new.start
0.0s info: Controller [oid=0xb644] [ec=0xb658] [pid=94561] [2025-09-18 10:19:38 +0300]
| Controller starting...
"ohai"
0.12s info: Async::Container::Notify::Console [oid=0xb6a8] [ec=0xb658] [pid=94561] [2025-09-18 10:19:38 +0300]
| {:ready=>true, :size=>0}
0.12s info: Controller [oid=0xb644] [ec=0xb658] [pid=94561] [2025-09-18 10:19:38 +0300]
| Controller started...
=> nil
3.3.6 :017 > Async { Controller.new.start }
10.07s info: Controller [oid=0xe9e8] [ec=0xe9fc] [pid=94561] [2025-09-18 10:19:48 +0300]
| Controller starting...
"ohai"
/Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:212:in `raise': Task was stopped (Async::Stop)
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:212:in `raise'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/task.rb:318:in `stop'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/node.rb:272:in `terminate'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:140:in `block in terminate'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/list.rb:298:in `each'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/list.rb:311:in `each'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/list.rb:180:in `each'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:139:in `terminate'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:150:in `block in close'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:528:in `block in run_loop'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:525:in `handle_interrupt'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:525:in `run_loop'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:149:in `close'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/reactor.rb:29:in `scheduler_close'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:102:in `fork'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:102:in `block in fork'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:146:in `initialize'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:101:in `new'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:101:in `fork'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:268:in `start'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/generic.rb:176:in `block in spawn'
10.18s error: Async::Container::Forked [oid=0xea38] [ec=0xea4c] [pid=94561] [2025-09-18 10:19:48 +0300]
| {
| "status": "pid 94569 exit 1"
| }
10.18s error: Async::Container::Notify::Console [oid=0xb6a8] [ec=0xe9fc] [pid=94561] [2025-09-18 10:19:48 +0300]
| {:status=>"Container failed to start!"}
10.18s info: Async::Container::Group [oid=0xea60] [ec=0xe9fc] [pid=94561] [2025-09-18 10:19:48 +0300]
| Sending terminate to 0 running processes...
10.18s info: Async::Container::Group [oid=0xea60] [ec=0xe9fc] [pid=94561] [2025-09-18 10:19:48 +0300]
| Sending terminate to 0 running processes...
10.18s warn: Async::Task [oid=0xea74] [ec=0xe9fc] [pid=94561] [2025-09-18 10:19:48 +0300]
| Task may have ended with unhandled exception.
| Async::Container::SetupError: Could not create container!
| → /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/controller.rb:139 in `restart'
| /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/controller.rb:95 in `start'
| (irb):17 in `block in <top (required)>'
| /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/task.rb:207 in `block in run'
| /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/task.rb:452 in `block in schedule'
3.3.6 :018 > class Controller < Async::Container::Controller
3.3.6 :019 > def create_container
3.3.6 :020 > Async::Container::Forked.new
3.3.6 :021 > # or Async::Container::Threaded.new
3.3.6 :022 > # or Async::Container::Hybrid.new
3.3.6 :023 > end
3.3.6 :024 >
3.3.6 :025 > def setup(container)
3.3.6 :026 > container.run count: 1, restart: false do |instance|
3.3.6 :027 > Async { |task| task.sleep 1; p 'end' }
3.3.6 :028 > end
3.3.6 :029 > end
3.3.6 :030 > end
=> :setup
3.3.6 :031 > Async { Controller.new.start }
22m info: Controller [oid=0x55b18] [ec=0x55b2c] [pid=94561] [2025-09-18 10:42:16 +0300]
| Controller starting...
/Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:212:in `raise': Task was stopped (Async::Stop)
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:212:in `raise'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/task.rb:318:in `stop'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/node.rb:272:in `terminate'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:140:in `block in terminate'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/list.rb:298:in `each'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/list.rb:311:in `each'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/list.rb:180:in `each'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:139:in `terminate'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:150:in `block in close'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:528:in `block in run_loop'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:525:in `handle_interrupt'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:525:in `run_loop'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/scheduler.rb:149:in `close'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/reactor.rb:29:in `scheduler_close'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:102:in `fork'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:102:in `block in fork'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:146:in `initialize'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:101:in `new'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:101:in `fork'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/forked.rb:268:in `start'
from /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/generic.rb:176:in `block in spawn'
22m error: Async::Container::Forked [oid=0x55b68] [ec=0x55b7c] [pid=94561] [2025-09-18 10:42:17 +0300]
| {
| "status": "pid 95167 exit 1"
| }
22m error: Async::Container::Notify::Console [oid=0xb6a8] [ec=0x55b2c] [pid=94561] [2025-09-18 10:42:17 +0300]
| {:status=>"Container failed to start!"}
22m info: Async::Container::Group [oid=0x55b90] [ec=0x55b2c] [pid=94561] [2025-09-18 10:42:17 +0300]
| Sending terminate to 0 running processes...
22m info: Async::Container::Group [oid=0x55b90] [ec=0x55b2c] [pid=94561] [2025-09-18 10:42:17 +0300]
| Sending terminate to 0 running processes...
22m warn: Async::Task [oid=0x55ba4] [ec=0x55b2c] [pid=94561] [2025-09-18 10:42:17 +0300]
| Task may have ended with unhandled exception.
| Async::Container::SetupError: Could not create container!
| → /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/controller.rb:139 in `restart'
| /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-container-0.27.0/lib/async/container/controller.rb:95 in `start'
| (irb):31 in `block in <top (required)>'
| /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/task.rb:207 in `block in run'
| /Users/slowpilot/.rvm/gems/ruby-3.3.6/gems/async-2.32.0/lib/async/task.rb:452 in `block in schedule'
The same approach worked with a previous version of the async-controller, but unfortunately, I'm unable to specify which exact version it was.