SocketError - getaddrinfo: Name or service not known:

Is there any additional information I can supply to help?

• sinatra (0.3.3)
• thin (1.0.0)
• rack (0.4.0)
• eventmachine (0.12.2)

Any suggestions for other things to try?

I switched from RestClient to Curb (curl lib) and still have the same issue:

Curl::Err::HostResolutionError - Couldn't resolve host name:

It seems like running this Sinatra app under Thin causes some issues resolving host names when making outbound requests.

I really want to use Thin because I can then monitor it's pid file with god to make sure the app stays up.

Currently I'm unable to get my Thin server running to reproduce the error.

I filed a ticket w/Sinatra however it's tagged as 'thin error'

http://sinatra.lighthouseapp.com...

I uploaded the code to a public git repo so anyone could give it a whirl: http://github.com/mjfreshyfresh/...

Currently I'm unable to start the Thin server, it appears to be starting correctly, then it starts again with each request.

The start command I'm using is:

thin -C ./config.yml

Could you grab my code and confirm that I'm doing this correctly.

The gems I'm using are: * thin (1.0.0) * rack (0.9.1) * sinatra (0.9.0.2)

The full stack trace is:

!! Unexpected error while processing request: undefined method `run' for main:Object
undefined method `run' for main:Object
	/Users/mjfreshyfresh/projects/scg/face_mask/simple_app/config.ru:7
	/usr/local/lib/ruby/gems/1.8/gems/sinatra-0.9.0.2/lib/sinatra/base.rb:812:in `load'
	/usr/local/lib/ruby/gems/1.8/gems/sinatra-0.9.0.2/lib/sinatra/base.rb:812:in `reload!'
	/usr/local/lib/ruby/gems/1.8/gems/sinatra-0.9.0.2/lib/sinatra/base.rb:804:in `call'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/connection.rb:63:in `pre_process'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/connection.rb:54:in `process'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/connection.rb:39:in `receive_data'
	/usr/local/lib/ruby/gems/1.8/gems/eventmachine-0.12.2/lib/eventmachine.rb:231:in `run_machine'
	/usr/local/lib/ruby/gems/1.8/gems/eventmachine-0.12.2/lib/eventmachine.rb:231:in `run'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/backends/base.rb:57:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/server.rb:150:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/controllers/controller.rb:80:in `start'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/runner.rb:173:in `send'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/runner.rb:173:in `run_command'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/lib/thin/runner.rb:139:in `run!'
	/usr/local/lib/ruby/gems/1.8/gems/thin-1.0.0/bin/thin:6
	/usr/local/bin/thin:19:in `load'
	/usr/local/bin/thin:19

It seems to be a problem w/ how Sinatra reloads the config file.

It doesn't work w/ rackup either:

rackup config.ru

same error, which uses mongrel.

Problem solved need to include a line to 'disable :reload'

Thanks to atduskgreg and Blake for the support.

require 'rubygems'
require 'sinatra'
require 'rest_client'

set :run, false
disable :reload

get '/' do
  result = RestClient.get("http://google.com")
  "Chars on googles page: #{result.size}"
end

I just wanted to follow up with some recent information.

This problem resurfaced again with the exception:

/usr/lib/ruby/1.8/net/http.rb:560:in initialize': getaddrinfo: Name or service not known (SocketError)

from /usr/lib/ruby/1.8/net/http.rb:560:in `open'
from /usr/lib/ruby/1.8/net/http.rb:560:in `connect'
from /usr/lib/ruby/1.8/timeout.rb:48:in `timeout'
from /usr/lib/ruby/1.8/timeout.rb:76:in `timeout'
from /usr/lib/ruby/1.8/net/http.rb:560:in `connect'
from /usr/lib/ruby/1.8/net/http.rb:553:in `do_start'
from /usr/lib/ruby/1.8/net/http.rb:542:in `start'

Switching from a domain name to an IP address produced a different exception:

Errno::EMFILE - Too many open files - socket(2):
	 /usr/lib/ruby/1.8/net/http.rb:560:in `initialize'
	 /usr/lib/ruby/1.8/net/http.rb:560:in `open'
	 /usr/lib/ruby/1.8/net/http.rb:560:in `connect'
	 /usr/lib/ruby/1.8/timeout.rb:48:in `timeout'
	 /usr/lib/ruby/1.8/timeout.rb:76:in `timeout'
	 /usr/lib/ruby/1.8/net/http.rb:560:in `connect'
	 /usr/lib/ruby/1.8/net/http.rb:553:in `do_start'
	 /usr/lib/ruby/1.8/net/http.rb:542:in `start'

To correct this issue we raised the max_conns in the config.yml to

max_conns: 1024
max_persistent_conns: 512

And this seemed to solve the problem...

Do you really have more then 512 open file at the same time? That's a lot. Maybe your connection are not being closed properly.

You can see the open files for a process w/

lsof -p <pid>