#99 open

thin stop times out and fails

Reported by maiken | May 17th, 2009 @ 11:19 AM | in Waiting for EM


  • Install ruby 1.9.1p129 (2009-05-12 revision 23412) and thin 1.2.1 on Ubuntu 8.04 LTS
  • Write a hello-world rackup file and save as hello_world.ru
app = proc do |env|
    'Content-Type' => 'text/html',
    'Content-Length' => '2'

run app
  • Start a cluster of thin processes: "thin start -s 3 -R hello_world.ru"
  • Now try to stop them: "thin stop -s 3"


Stopping server on ... 
Sending QUIT signal to process 31975 ... 
Stopping server on ... 
Sending QUIT signal to process 31988 ... 
Stopping server on ... 
Sending QUIT signal to process 32001 ... 

thin processes are still running.

the thin processes aren't responsive to a regular "kill ", either.
However, if I load from their respective ports, they process the quit request and exit. That is, if, while "thin stop" is trying to stop the port-3000 daemon, I do an HTTP load against port 3000, the process will exit. Without the load, the process will run forever.

Expect: thin processes are responsive to quit requests.

If you have difficulty reproducing the issue let me know how to take additional traces.

Comments and changes to this ticket

  • maiken

    maiken May 17th, 2009 @ 11:29 AM

    • Tag set to epoll, eventmachine, ruby19

    Update: passing --no-epoll when starting the cluster solves the problem. Is this a known eventmachine issue?

  • macournoyer

    macournoyer May 18th, 2009 @ 09:06 AM

    • State changed from “new” to “open”

    It do look like an old eventmachine issue, can you try updating to latest version of EM?

  • maiken

    maiken May 18th, 2009 @ 10:16 AM

    $ gem list

    eventmachine (0.12.6)

    This is the most recent version offered on RubyForge; if you are suggesting I run code more recent than this, how should I install it?

  • maiken

    maiken May 21st, 2009 @ 12:31 PM

    Any news on this? Should I be installing Eventmachine from somewhere else (please specify?)

  • macournoyer

    macournoyer May 21st, 2009 @ 02:13 PM

    • Milestone changed from Future to Waiting for EM

    There was a similar issue in previous version but under 1.8 iirc. If it works w/out epoll it probably is an EventMachine issue. You should ask eventmachine ppl about it:

    or #eventmachine on freenode

  • maiken

    maiken May 29th, 2009 @ 04:40 PM

    Just to be clear, can you confirm that thin uses eventmachine even under Ruby 1.9? One of the EM folks had the impression that it does not...

  • macournoyer

    macournoyer May 29th, 2009 @ 04:44 PM

    oh yes, Thin uses eventmachine exclusively, unless you explicitly specify a backend using the --backend option.

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