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Asked: 2026-05-10T15:36:29+00:00

Why do I get following error when trying to start a ruby on rails

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Why do I get following error when trying to start a ruby on rails application with 

mongrel_rails start

?

  C:\RailsTest\cookbook2>mongrel_rails start ** WARNING: Win32 does not support daemon mode. ** Daemonized, any open files are closed.  Look at log/mongrel.pid and log/mongr el.log for info. ** Starting Mongrel listening at 0.0.0.0:3000 c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/t cphack.rb:12:in `initialize_without_backlog': Only one usage of each socket addr ess (protocol/network address/port) is normally permitted. - bind(2) (Errno::EAD DRINUSE)         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel/tcphack.rb:12:in `initialize'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel.rb:93:in `new'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel.rb:93:in `initialize'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel/configurator.rb:139:in `new'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel/configurator.rb:139:in `listener'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mon grel_rails:99:in `cloaker_'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel/configurator.rb:50:in `call'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel/configurator.rb:50:in `initialize'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mon grel_rails:84:in `new'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mon grel_rails:84:in `run'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../ lib/mongrel/command.rb:212:in `run'         from c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mon grel_rails:281         from c:/ruby/bin/mongrel_rails:19:in `load'         from c:/ruby/bin/mongrel_rails:19
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1 Answer

  1. You already have a process listening on port 3000 (the default port for mongrel).

    Try:

    mongrel_rails start -p 3001

    and see whether you get a similar error.

    If you’re trying to install more than one Rails app, you need to assign each mongrel to a separate port and edit you apache conf accordingly.

    If you not trying to do that, the most direct way of killing all mongrels is to open windows task manager and kill all the ‘ruby’ processes.

    Note that if you have mongrel installed as a service that starts automatically

    mongrel_rails install::service ...

    …the ruby process will regenerate automatically. In that case, you’ll have to edit the process properties through the windows services panel. Let me know if you need more info.

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