Child processes hang and won't die under Ruby 1.9

[rtomayko]

Running under Ruby 1.9 w/ webrick, the child processes are hanging pretty much immediately after fork. I think the issue may be that the child processes still have the parent process's accept socket open and so children are getting requests. Needs more research.

[speedmax]

confirmed,
ruby 1.9
Shotgun 0.6

works
ruby config.ru

doesn't work, it's just hangs there forever
shotgun config.ru

[ghost]

I'm not sure if this is related, but I've found that whenever I start my Sinatra app using Shotgun, the first request hangs indefinitely. After I hit refresh everything works fine, but when I try to kill webrick it hangs at "going to shutdown ..." until I open up Activity Monitor and manually kill the Ruby process(es). This doesn't happen when I use rackup, so I assume the problem is with Shotgun. (Ruby 1.9.1p376, Shotgun 0.6)

[noonat]

This seems to be due to Marshal causing a deadlock. Like grant said, it's just that first request that deadlocks... if I kill that request, the server shuts down normally. Also, the forked parent PID is the main parent PID for subsequent requests, so I don't think the child is accepting connections.

[noonat]

I think this is the issue causing it for me:
http://redmine.ruby-lang.org/issues/show/1525

[ryansobol]

Maybe the simplest solution is to add some logic to prevent shotgun from firing up Webrick when it detects Ruby 1.9?

[wilkerlucio]

here with Shotgun 0.8 and Ruby 1.9 the application dont works, results on load error (cant find the file of my app)

[martinisoft]

+1 it cannot load my app file when using Webrick or Thin on Ruby 1.9.2-p0 with Shotgun 0.8 and Sinatra 1.1.0.

Backtrace:

internal:lib/rubygems/custom_require:29:in require' <internal:lib/rubygems/custom_require>:29:inrequire'
/usr/local/Cellar/gems/1.9/gems/shotgun-0.8/lib/shotgun/loader.rb:114:in inner_app' /usr/local/Cellar/gems/1.9/gems/shotgun-0.8/lib/shotgun/loader.rb:102:inassemble_app'
/usr/local/Cellar/gems/1.9/gems/shotgun-0.8/lib/shotgun/loader.rb:86:in proceed_as_child' /usr/local/Cellar/gems/1.9/gems/shotgun-0.8/lib/shotgun/loader.rb:31:incall!'
/usr/local/Cellar/gems/1.9/gems/shotgun-0.8/lib/shotgun/loader.rb:18:in call' /usr/local/Cellar/gems/1.9/gems/shotgun-0.8/lib/shotgun/favicon.rb:12:incall'
/usr/local/Cellar/gems/1.9/gems/rack-1.2.1/lib/rack/builder.rb:77:in call' /usr/local/Cellar/gems/1.9/gems/rack-1.2.1/lib/rack/content_length.rb:13:incall'
/usr/local/Cellar/gems/1.9/gems/rack-1.2.1/lib/rack/chunked.rb:15:in call' /usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/connection.rb:76:inblock in pre_process'
/usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/connection.rb:74:in catch' /usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/connection.rb:74:inpre_process'
/usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/connection.rb:57:in process' /usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/connection.rb:42:inreceive_data'
/usr/local/Cellar/gems/1.9/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in run_machine' /usr/local/Cellar/gems/1.9/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:inrun'
/usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/backends/base.rb:57:in start' /usr/local/Cellar/gems/1.9/gems/thin-1.2.7/lib/thin/server.rb:156:instart'
/usr/local/Cellar/gems/1.9/gems/rack-1.2.1/lib/rack/handler/thin.rb:14:in run' /usr/local/Cellar/gems/1.9/gems/shotgun-0.8/bin/shotgun:156:in<top (required)>'
/usr/local/bin/shotgun:19:in load' /usr/local/bin/shotgun:19:in

'


[martinisoft]

Aha, correction, this has been fixed in issue http://github.com/rtomayko/shotgun/issues/closed#issue/22 and this is a duplicate, at least for my problem. Installing the gem via git worked like a charm :)

[rtomayko]

The LoadError related issues should be fixed. Could those of you that were having issues on the first request give 0.9 a try and see if that fixes anything for you?

[djanowski]

We assume this is no longer an issue. Please file a new issue if it is. Thanks.