[DRE-maint] Bug#812103:

[Rémi Verchère]

I confirm the bug. When downgrading to version 2.2.11debian-2, no issues.

Redmine environment:
  Redmine version                          2.2.3.stable.11436
  Ruby version                             1.8.7 (x86_64-linux)
  Rails version                            3.2.12

Here are the Apache logs:

[ pid=4904 file=ext/apache2/Hooks.cpp:684 time=2016-01-21 10:24:08.988 ]:
  The backend application (process 4996) did not send a valid HTTP response; instead, it sent nothing at all. It is possible that i
t has crashed; please check whether there are crashing bugs in this application.
*** Exception ActionController::UnknownHttpMethod in PhusionPassenger::Rack::ApplicationSpawner (, accepted HTTP methods are OPTION
S, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK, VERSION-CONTROL, REPORT, CHE
CKOUT, CHECKIN, UNCHECKOUT, MKWORKSPACE, UPDATE, LABEL, MERGE, BASELINE-CONTROL, MKACTIVITY, ORDERPATCH, ACL, SEARCH, and PATCH) (p
rocess 4996):
        from /var/lib/gems/1.8/gems/actionpack-3.2.12/lib/action_dispatch/http/request.rb:275:in `check_method'
        from /var/lib/gems/1.8/gems/actionpack-3.2.12/lib/action_dispatch/http/request.rb:68:in `request_method'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/rack/logger.rb:40:in `started_request_message'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/rack/logger.rb:31:in `call_app'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/rack/logger.rb:16:in `call'
        from /var/lib/gems/1.8/gems/activesupport-3.2.12/lib/active_support/tagged_logging.rb:22:in `tagged'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/rack/logger.rb:16:in `call'
        from /var/lib/gems/1.8/gems/actionpack-3.2.12/lib/action_dispatch/middleware/request_id.rb:22:in `call'
        from /var/lib/gems/1.8/gems/rack-1.4.5/lib/rack/methodoverride.rb:21:in `call'
        from /var/lib/gems/1.8/gems/rack-1.4.5/lib/rack/runtime.rb:17:in `call'
        from /var/lib/gems/1.8/gems/activesupport-3.2.12/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
        from /var/lib/gems/1.8/gems/rack-1.4.5/lib/rack/lock.rb:15:in `call'
        from /var/lib/gems/1.8/gems/actionpack-3.2.12/lib/action_dispatch/middleware/static.rb:62:in `call'
        from /var/lib/gems/1.8/gems/rack-cache-1.2/lib/rack/cache/context.rb:136:in `forward'
        from /var/lib/gems/1.8/gems/rack-cache-1.2/lib/rack/cache/context.rb:143:in `pass'
        from /var/lib/gems/1.8/gems/rack-cache-1.2/lib/rack/cache/context.rb:155:in `invalidate'
        from /var/lib/gems/1.8/gems/rack-cache-1.2/lib/rack/cache/context.rb:71:in `call!'
        from /var/lib/gems/1.8/gems/rack-cache-1.2/lib/rack/cache/context.rb:51:in `call'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/engine.rb:479:in `call'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/application.rb:223:in `call'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/railtie/configurable.rb:30:in `send'
        from /var/lib/gems/1.8/gems/railties-3.2.12/lib/rails/railtie/configurable.rb:30:in `method_missing'
        from /usr/lib/ruby/1.8/phusion_passenger/rack/request_handler.rb:92:in `process_request'
        from /usr/lib/ruby/1.8/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
        from /usr/lib/ruby/1.8/phusion_passenger/rack/application_spawner.rb:118:in `run'
        from /usr/lib/ruby/1.8/phusion_passenger/rack/application_spawner.rb:65:in `spawn_application'
        from /usr/lib/ruby/1.8/phusion_passenger/utils.rb:184:in `safe_fork'
        from /usr/lib/ruby/1.8/phusion_passenger/rack/application_spawner.rb:58:in `spawn_application'
        from /usr/lib/ruby/1.8/phusion_passenger/rack/application_spawner.rb:41:in `spawn_application'
        from /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:159:in `spawn_application'
        from /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application'
        from /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:352:in `__send__'
        from /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:352:in `main_loop'
        from /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
        from /usr/lib/phusion_passenger/passenger-spawn-server:61
[Thu Jan 21 10:24:58 2016] [notice] caught SIGTERM, shutting down