Ruby Gems Passenger Error

Did you set the variable "Set Env" for ruby in your VirtualHost configuration?  It might looks like this.

<VirtualHost *:80>
    DocumentRoot /home/user/repos/rails_project/public
    ServerName rails.local
    ServerAlias *.rails.local
    RailsEnv development
    RailsAllowModRewrite off
    SetEnv GEM_HOME /home/user/rvm/gems/rub/
......................
.....................

Also make sure the path to ruby exists and executable.

Have tried this - now this is the error in the error log:
[ pid=6643 thr=47356637109696 file=ext/apache2/Hooks.cpp:860 time=2011-12-19 13:28:44.897 ]: Unexpected error in mod_passenger: Cannot spawn application '/home/oci/rails_apps/ocho': The spawn server has exited unexpectedly.

Could you check if sqlite3-ruby is installed? If no, please install it.

One more suggestion: Remove the /tmp/passenger.* directories and see the results.

sqlite3 is installed and I've removed the /tmp/passenger.* directory - still the same result:  pid=9953 thr=47411489164736 file=ext/apache2/Hooks.cpp:860 time=2011-12-19 17:51:06.320 ]: Unexpected error in mod_passenger: Cannot spawn application '/home/oci/rails_apps/ocho': The spawn server has exited unexpectedly.

Ok. Could you try to change the working directory from /tmp to some other directory (/var or something) ?

I don't understand - change the working directory where exactly?

You can change the /tmp/passenger location by adding the following line in virtual host entry.

PassengerUploadBufferDir /var/tmp/passenger

If its not working just remove the above line. Its just a trial and error method.

That line does not exist. Tried adding it and am getting the following when I try to restart Apache:

from /usr/lib/ruby/gems/1.8/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
      from /usr/lib/ruby/gems/1.8/gems/passenger-3.0.11/helper-scripts/passenger-spawn-server:99
[ pid=12296 thr=47411489164736 file=ext/apache2/Hooks.cpp:860 time=2011-12-20 08:34:44.240 ]: Unexpected error in mod_passenger: Cannot spawn application '/home/oci/rails_apps/ocho': The spawn server has exited unexpectedly.
  Backtrace:
     in 'virtual Passenger::SessionPtr Passenger::ApplicationPool::Client::get(const Passenger::PoolOptions&)' (Client.h:742)
     in 'Passenger::SessionPtr Hooks::getSession(const Passenger::PoolOptions&)' (Hooks.cpp:292)
     in 'int Hooks::handleRequest(request_rec*)' (Hooks.cpp:561)

[Tue Dec 20 07:05:11 2011] [notice] Graceful restart requested, doing restart
WARNING: The 'RailsAllowModRewrite' option is obsolete: Phusion Passenger now fully supports mod_rewrite. Please remove this option from your configuration file.[Tue Dec 20 07:05:11 2011] [notice] Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Phusion_Passenger/3.0.11 configured -- resuming normal operations
[Tue Dec 20 07:09:06 2011] [notice] caught SIGTERM, shutting down

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