Marc Heiler wrote in post #1038497: > You need to somehow isolate the problem as much as possible. > > Ideally into one simple .rb file that reproduces this problem. > > Try to narrow it down as much as possible. Hi, I made all the isolation in the code base, and I have a good coverage of test , that help a lot. Yesterday, I did a great debug in the all stack of the framework, line by line, and the error just appeared when the rack handle the assets, as follow: /usr/lib/ruby/1.8/webrick/httpserver.rb:50 while timeout > 0 (rdb:2) n [2011-12-28 16:22:52] ERROR #<Class:0xb6614868>: execution expired /usr/lib/ruby/1.8/timeout.rb:64:in `timeout' /usr/lib/ruby/1.8/timeout.rb:101:in `timeout' /usr/lib/ruby/1.8/webrick/httprequest.rb:326:in `_read_data' /usr/lib/ruby/1.8/webrick/httprequest.rb:337:in `read_line' /usr/lib/ruby/1.8/webrick/httprequest.rb:240:in `read_header' /usr/lib/ruby/1.8/webrick/httprequest.rb:88:in `parse' /usr/lib/ruby/1.8/webrick/httpserver.rb:56:in `run' /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:162:in `start' /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:95:in `start' /usr/lib/ruby/1.8/webrick/server.rb:92:in `each' /usr/lib/ruby/1.8/webrick/server.rb:92:in `start' /usr/lib/ruby/1.8/webrick/server.rb:23:in `start' /usr/lib/ruby/1.8/webrick/server.rb:82:in `start' /usr/lib/ruby/gems/1.8/gems/rack-1.3.5/lib/rack/handler/webrick.rb:13:in `run' /usr/lib/ruby/gems/1.8/gems/rack-1.3.5/lib/rack/server.rb:265:in `start' /usr/lib/ruby/gems/1.8/gems/railties-3.1.3/lib/rails/commands/server.rb:70:in `start' /usr/lib/ruby/gems/1.8/gems/railties-3.1.3/lib/rails/commands.rb:54 /usr/lib/ruby/gems/1.8/gems/railties-3.1.3/lib/rails/commands.rb:49:in `tap' /usr/lib/ruby/gems/1.8/gems/railties-3.1.3/lib/rails/commands.rb:49 script/rails:6:in `require' script/rails:6 /usr/lib/ruby/1.8/webrick/httpserver.rb:51 break if IO.select([sock], nil, nil, 0.5) I believe there is some incompatibility with the ruby 1.8.7, and the new way of asset of rails 3.1. At this moment I disabled the asset pipeline, coffeescript and sass. And I didn't got more the error. All my features of cucumber and spec are in green Thanks a lot -- Posted via http://www.ruby-forum.com/.