Hi, today we upgrade uWSGI on our development server to 1.9.5 version. Since that, none of Ruby on Rails applications running on Ruby 2.0.0-p0 works. I create a blank Rails 3.2.13 application and it works without any problems with Ruby 1.9.3, but on 2.0.0 uWSGI can't even run a application because have some problems with `json` Gem.
There's a output from RoR app running 1.9.3: $ rvm current ruby-1.9.3-p392 $ gem list *** LOCAL GEMS *** actionmailer (3.2.13) actionpack (3.2.13) activemodel (3.2.13) activerecord (3.2.13) activeresource (3.2.13) activesupport (3.2.13) arel (3.0.2) builder (3.0.4) bundler (1.3.5) coffee-rails (3.2.2) coffee-script (2.2.0) coffee-script-source (1.6.2) erubis (2.7.0) execjs (1.4.0) hike (1.2.1) i18n (0.6.1) journey (1.0.4) jquery-rails (2.2.1) json (1.7.7) libv8 (3.11.8.17 x86_64-linux) mail (2.5.3) mime-types (1.22) multi_json (1.7.2) mysql (2.9.1) mysql2 (0.3.11) polyglot (0.3.3) rack (1.4.5) rack-cache (1.2) rack-ssl (1.3.3) rack-test (0.6.2) rails (3.2.13) railties (3.2.13) rake (10.0.4) rdoc (3.12.2) ref (1.0.4) rubygems-bundler (1.1.1) rvm (1.11.3.7) sass (3.2.7) sass-rails (3.2.6) sprockets (2.2.2) therubyracer (0.11.4) thor (0.18.1) tilt (1.3.6) treetop (1.4.12) tzinfo (0.3.37) uglifier (2.0.0) $ uwsgi --rack config.ru -s 127.0.0.1:3031 --master *** Starting uWSGI 1.9.5 (64bit) on [Sat Apr 6 17:49:43 2013] *** compiled with version: 4.6.3 on 06 April 2013 15:58:40 os: Linux-3.2.13-grsec-xxxx-grs-ipv6-64 #1 SMP Thu Mar 29 09:48:59 UTC 2012 nodename: ThePretender machine: x86_64 clock source: unix pcre jit disabled detected number of CPU cores: 4 current working directory: /srv/users/galmido/applications/main/application detected binary path: /usr/local/bin/uwsgi your processes number limit is 15841 your memory page size is 4096 bytes detected max file descriptor number: 1024 lock engine: pthread robust mutexes uwsgi socket 0 bound to TCP address 127.0.0.1:3031 fd 3 ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux] your server socket listen backlog is limited to 100 connections your mercy for graceful operations on workers is 60 seconds mapped 161744 bytes (157 KB) for 1 cores *** Operational MODE: single process *** RACK app 0 loaded in 5 seconds at 0x1750 (GC frequency: AGGRESSIVE) *** uWSGI is running in multiple interpreter mode *** spawned uWSGI master process (pid: 27160) spawned uWSGI worker 1 (pid: 27164, cores: 1) And from 2.0.0-p0: $ rvm current ruby-2.0.0-p0@main $ gem list *** LOCAL GEMS *** actionmailer (3.2.9.rc2) actionpack (3.2.9.rc2) activemodel (3.2.9.rc2) activerecord (3.2.9.rc2) activeresource (3.2.9.rc2) activesupport (3.2.9.rc2) arel (3.0.2) bcrypt-ruby (3.0.1) better_errors (0.7.2) binding_of_caller (0.7.1) bootstrap-sass (2.3.1.0) builder (3.0.4) bundler (1.3.4) cancan (1.6.9) capybara (2.0.2) childprocess (0.3.9) chunky_png (1.2.7) climate_control (0.0.3) closure_tree (3.10.1) cocaine (0.5.1) coderay (1.0.9) coffee-rails (3.2.2) coffee-script (2.2.0) coffee-script-source (1.6.2) compass (0.12.2) compass-rails (1.0.3) cucumber (1.2.3) cucumber-rails (1.3.1) database_cleaner (0.9.1) debug_inspector (0.0.2) devise (2.2.3) diff-lcs (1.2.1) erubis (2.7.0) execjs (1.4.0) ffi (1.5.0) font-awesome-sass-rails (3.0.2.2) foreigner (1.4.0) fssm (0.2.10) gherkin (2.11.6) haml (4.0.1) hike (1.2.1) i18n (0.6.4) journey (1.0.4) jquery-fileupload-rails (0.4.1) jquery-rails (2.2.1) jquery-ui-rails (4.0.2) json (1.7.7, 1.7.6) kaminari (0.14.1) libv8 (3.11.8.17 x86_64-linux, 3.3.10.4 x86_64-linux) mail (2.4.4) mail_form (1.4.1) meta_request (0.2.2) mime-types (1.22, 1.21) multi_json (1.7.2) mysql2 (0.3.11) nokogiri (1.5.9) orm_adapter (0.4.0) paperclip (3.4.1) polyamorous (0.5.0) polyglot (0.3.3) rabl (0.8.0) rack (1.4.5) rack-cache (1.2) rack-contrib (1.1.0) rack-ssl (1.3.3) rack-test (0.6.2) rails (3.2.9.rc2) railties (3.2.9.rc2) rake (10.0.4, 10.0.3) rdoc (3.12.2) redcarpet (2.2.2) ref (1.0.4) rubygems-bundler (1.1.1) rubyzip (0.9.9) rvm (1.11.3.6) sass (3.2.7) sass-rails (3.2.6) selenium-webdriver (2.31.0) sprockets (2.9.0) squeel (1.0.18) therubyracer (0.11.4, 0.10.2) thor (0.18.1, 0.17.0) tilt (1.3.6) treetop (1.4.12) tzinfo (0.3.37) uglifier (1.3.0) warden (1.2.1) websocket (1.0.7) with_advisory_lock (0.0.6) xpath (1.0.0) $ uwsgi --rack config.ru -s 127.0.0.1:3031 --master *** Starting uWSGI 1.9.5 (64bit) on [Sat Apr 6 17:53:20 2013] *** compiled with version: 4.6.3 on 06 April 2013 15:58:40 os: Linux-3.2.13-grsec-xxxx-grs-ipv6-64 #1 SMP Thu Mar 29 09:48:59 UTC 2012 nodename: ThePretender machine: x86_64 clock source: unix pcre jit disabled detected number of CPU cores: 4 current working directory: /srv/users/galmido/applications/main/application detected binary path: /usr/local/bin/uwsgi your processes number limit is 15841 your memory page size is 4096 bytes detected max file descriptor number: 1024 lock engine: pthread robust mutexes uwsgi socket 0 bound to TCP address 127.0.0.1:3031 fd 3 ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux] your server socket listen backlog is limited to 100 connections your mercy for graceful operations on workers is 60 seconds mapped 161744 bytes (157 KB) for 1 cores *** Operational MODE: single process *** /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json/common.rb:67:in `initialize': can't convert nil into Hash (TypeError) from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json/common.rb:67:in `new' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json/common.rb:67:in `generator=' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json/ext.rb:17:in `<module:Ext>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json/ext.rb:12:in `<module:JSON>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json/ext.rb:9:in `<top (required)>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json.rb:58:in `require' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json.rb:58:in `<module:JSON>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/json-1.7.7/lib/json.rb:54:in `<top (required)>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler/runtime.rb:72:in `require' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler/runtime.rb:72:in `block (2 levels) in require' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler/runtime.rb:70:in `each' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler/runtime.rb:70:in `block in require' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler/runtime.rb:59:in `each' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler/runtime.rb:59:in `require' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@global/gems/bundler-1.3.4/lib/bundler.rb:132:in `require' from /srv/users/galmido/applications/main/application/config/application.rb:7:in `<top (required)>' from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /srv/users/galmido/applications/main/application/config/environment.rb:2:in `<top (required)>' from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from config.ru:3:in `block in <main>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize' from config.ru:in `new' from config.ru:in `<main>' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval' from /home/galmido/.rvm/gems/ruby-2.0.0-p0@main/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file' I struggling with this all day long and don't have any idea what is wrong.
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