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PORails and MySQL - ActiveRecord::ConnectionNotEstablished in production environment
 

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  1. PORails and MySQL - ActiveRecord::ConnectionNotEstablished in production environment
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    <p>I'll try to be short:<br /> Using <i>Rails 3.2.1</i> and <i>mysql2</i> for databases; running on Ubuntu 11.10<br /> In <i>development</i> environment everything works just fine<br /> When I start my server <i>(WEBrick)</i> in <i>production</i>, it boots up fine, but after loading any page, it raises the following error:<br /></p> <pre><code>ActiveRecord::ConnectionNotEstablished (ActiveRecord::ConnectionNotEstablished): activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in retrieve_connection' activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_specification.rb:168:in `retrieve_connection' activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_specification.rb:142:in `connection' ... /home/metjush/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' /home/metjush/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' /home/metjush/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread' </code></pre> <p>After trying to find any possible source of error, and consulting like a billion different websites and similar reports, I am still not able to find what's wrong. My <i> database.yml</i> (running on localhost right now, and have my settings in production environment the same as for development, which works) is fine, my <i>Gemfile</i> is alright (gem 'mysql2' included, don't worry), the production database is created and rake db:migrate had no problems migrating it... Any other possible source of error I did not think of or did not find on the internet?<br /></p> <p><b>I stress, this only happens in production</b></p> <p>Thanks for your help</p> <hr> <p><b>EDIT</b> Posting my Gemfile:<br /></p> <pre><code>source 'https://rubygems.org' gem 'rails', '3.2.1' gem 'mysql2' # Gems used only for assets and not required # in production environments by default. group :assets do gem 'sass-rails', '~&gt; 3.2.3' gem 'coffee-rails', '~&gt; 3.2.1' gem 'uglifier', '&gt;= 1.0.3' end gem 'jquery-rails' gem 'bcrypt-ruby', :require =&gt; 'bcrypt' gem 'rufus-scheduler' gem 'gmaps4rails' </code></pre> <p>Hope this helps - although I don't really see anything wrong with it.</p> <p><strong>EDIT TWO</strong><br /> Oddly enough, I have no problems when I start the rails console in the production environment - MySQL queries work, model instances can be saved without problems. I only get the aforementioned error when I try to access the database from the browser.</p>
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    1. COIf you copy `\config\environment\development.rb` into `\config\environment\production.rb`, does it work ?
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    2. COdo you have `username` and `password` setup correctly on your localhost?? It happens only when rails is not able to connect to the db server or to the database.
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    3. COCopying `development.rb` into `production.rb` did not change anything, still the same error.
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