getaddrinfo nodename nor servname provided or not known

Question

I have a Ruby on Rails application that I am deploying on a computer running Mac OS X 10 6  The code where the problem arises is run by a delayed job  The problem only occurs when it is run through delayed job  If I run it within a console  rails console production  or call the API directly through cURL  it works without any problems  Also  the entire process works without issue in my development environment   Basically  the code works in one place  but for some reason  fails where it has to work  I ve searched and found a few resources  but none of the suggestions apply or make any difference  When I log into the server and run the commands  everything works  But for some reason when they are run started by Capistrano  it doesn t work   Any help is greatly appreciated   Important notes    Ruby version  1 9 2-p0 Rails version  3 0 1 delayed job version  latest  from collectiveidea delayed job  rest-client version  1 6 1   Code   class CallApi  lt  Struct new  num    def perform     log  Entering perform      apinum   num    5     log  ApiNum     apinum       results   attempt 2 10  do       ActiveSupport  JSON decode RestClient get API URL    params   gt    apinum   gt  apinum         end     log  Results retrieved   count    results count      end    def log message      Delayed  Worker logger info   CallApi    Time now  -   message     end end   Environment Config  note  the url is fake  but of the same form as the real one    API URL    http   api example org api endpoint    Originally  I had  http     before the beginning  but found a   post mentioning that Net  Http start didn t like that    So I tried it both ways    The same error occurs regardless of if the  http     is there    Call where the error happens   RestClient get API URL    params   gt    apinum   gt  apinum      Error   getaddrinfo  nodename nor servname provided  or not known  Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 net http rb 644 in  initialize   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 net http rb 644 in  open   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 net http rb 644 in  block in connect   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 timeout rb 44 in  timeout   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 timeout rb 87 in  timeout   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 net http rb 644 in  connect   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 net http rb 637 in  do start   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 net http rb 626 in  start   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems rest-client-1 6 1 lib restclient request rb 166 in  transmit   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems rest-client-1 6 1 lib restclient request rb 60 in  execute   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems rest-client-1 6 1 lib restclient request rb 31 in  execute   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems rest-client-1 6 1 lib restclient rb 68 in  get   private var www project-gemset releases 20101109002137 lib call api rb 7 in  block in perform   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems attempt-0 2 0 lib attempt rb 70 in  attempt   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems attempt-0 2 0 lib attempt rb 114 in  attempt   private var www project-gemset releases 20101109002137 lib call api rb 6 in  perform   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed backend base rb 77 in  invoke job   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 118 in  block  2 levels  in run   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 timeout rb 57 in  timeout   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 118 in  block in run   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 benchmark rb 309 in  realtime   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 117 in  run   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 176 in  reserve and run one job   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 102 in  block in work off   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 101 in  times   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 101 in  work off   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 76 in  block  2 levels  in start   Users api  rvm rubies ruby-1 9 2-p0 lib ruby 1 9 1 benchmark rb 309 in  realtime   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 75 in  block in start   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 72 in  loop   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed worker rb 72 in  start   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed command rb 100 in  run   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed command rb 79 in  block in run process   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application rb 250 in  call   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application rb 250 in  block in start proc   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons daemonize rb 199 in  call   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons daemonize rb 199 in  call as daemon   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application rb 254 in  start proc   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application rb 294 in  start   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application group rb 159 in  block  2 levels  in start all   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application group rb 158 in  fork   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application group rb 158 in  block in start all   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application group rb 157 in  each   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons application group rb 157 in  start all   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons controller rb 80 in  run   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons rb 193 in  block in run proc   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons cmdline rb 112 in  call   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons cmdline rb 112 in  catch exceptions   Users api  rvm gems ruby-1 9 2-p0 project-gemset gems daemons-1 1 0 lib daemons rb 192 in  run proc   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed command rb 78 in  run process   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed command rb 72 in  block in daemonize   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed command rb 70 in  times   Users api  rvm gems ruby-1 9 2-p0 project-gemset bundler gems delayed job-aba9905764c2 lib delayed command rb 70 in  daemonize  script delayed job 5 in

User · Answer

I restarted my computer  Mac Mountain Lion  and the problem fixed itself  Something having to do with the shell thinking it was disconnected from the internet I think   Restarting your shell in some definite way may solve this problem as well  Simply opening up a new session window however did not work

User · Answer

I got the same error when I check the localhost is set in hosts file it is somehow not set  Setting localhost to 127 0 0 1 solved it   sudo vi  etc hosts  gt  gt   127 0 0 1       localhost

User · Answer

I ran into a similar situation today - deploying an app to a mac os x server  and receiving the  getaddrinfo  message when I tried to access an external api  It turns out that the error occurs when the ssh session that originally launched the app is no longer active  That s why everything works perfectly if you ssh into your server and run commands manually  or launch the server manually  - as long as you keep your ssh session alive  this error won t occur   Whether this is a bug or a quirk in OS X  I m not sure  Here s the page that led me to the solution - http   lists apple com archives unix-porting 2010 Jul msg00001 html  All I had to do was update my capistrano task to launch the app using  nohup   So changing  run  cd   current path   amp  amp  RAILS ENV production unicorn rails -c config unicorn rb -D    to  run  cd   current path   amp  amp  RAILS ENV production nohup unicorn rails -c config unicorn rb -D    did the trick for me   Hope this helps somebody - it was quite a pain to figure out

User · Answer

To avoid this problem  we can bind to 127 0 0 1 instead of localhost   bin rails server -b 127 0 0 1

User · Answer

If all of the above fails  try to convert to UNIX Line Endings  or do   brew install dos2unix sudo dos2unix -c mac  private etc hosts   Maybe the hosts encoding is wrong   hope this helps

User · Answer

In my config application yml I have changed this  redis      url   redis   redis 6379 0    to this  redis      url   redis   localhost 6379 0    and it works for me

User · Answer

I fixed this problem simply by closing and reopening the Terminal

User · Answer

For me  I had to change a line of code in my local env yml to get the rspec tests to run   I had originally had   REDIS HOST   redis   and changed it to   REDIS HOST   localhost   and the test ran fine

User · Answer

I was seeing this error unrelated to rails  It turned out my test was trying to use a port that was too high  greater than 65535    This code will produce the error in question  require  socket  Socket getaddrinfo  127 0 0 1    65536

User · Answer

The error occurs when the DNS resolution fails  Check if you can wget  or curl  the api url from the command line  Changing the DNS server and testing it might help

User · Answer

rest-client s RestClient needs the http  scheme when resolving the URL  It calls Net  HTTP for you  which doesn t want the http  part  but rest-client takes care of that   Is the URL the actual one you are attempting to reach  example org is a valid domain used for testing and documentation and is reachable  I d expect the  api  and  api endpoint  parts to fail and see that when I try to reach them   require  socket   IPSocket getaddress  example org       gt   2620 0 2d0 200  10  IPSocket getaddress  api example org       gt       gt  - 7 in  getaddress   getaddrinfo  nodename nor servname provided  or not known  SocketError      gt     from - 7 in   lt main gt     Here s what I get using Curl   greg-mbp-wireless   greg  curl api example org api endpoint curl   6  Couldn t resolve host  api example org  greg-mbp-wireless   greg  curl example org api endpoint  lt  DOCTYPE HTML PUBLIC  -  IETF  DTD HTML 2 0  EN  gt   lt html gt  lt head gt   lt title gt 404 Not Found lt  title gt   lt  head gt  lt body gt   lt h1 gt Not Found lt  h1 gt   lt p gt The requested URL  api endpoint was not found on this server  lt  p gt   lt hr gt   lt address gt Apache Server at example org Port 80 lt  address gt   lt  body gt  lt  html gt  greg-mbp-wireless   greg  curl example org  lt  DOCTYPE HTML PUBLIC  -  W3C  DTD HTML 4 01 Transitional  EN  gt   lt HTML gt   lt HEAD gt     lt META http-equiv  Content-Type  content  text html  charset utf-8  gt     lt TITLE gt Example Web Page lt  TITLE gt   lt  HEAD gt    lt body gt     lt p gt You have reached this web page by typing  amp quot example com amp quot    amp quot example net amp quot   amp quot example org amp quot   or  amp quot example edu amp quot  into your web browser  lt  p gt   lt p gt These domain names are reserved for use in documentation and are not available    for registration  See  lt a href  http   www rfc-editor org rfc rfc2606 txt  gt RFC    2606 lt  a gt   Section 3  lt  p gt   lt  BODY gt   lt  HTML gt

User · Answer

I had this problem running rake db create  This page clued me into the DNS issue  I checked my VPN connection and found it was disconnected for some reason  I reconnected and now rake worked without a hitch

User · Answer

I got the error while trying to develop while disconnected to the Internet  However  the website I was working on needs to be able to talk to some other websites  so it choked when it couldn t do so  Connecting to the internet fixed the error

[ruby-on-rails] getaddrinfo: nodename nor servname provided, or not known

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