Gems not found with Passenger in conservative spawn mode on Mac OS X

We are using Passenger locally on Mac OS X for development.

I switched to conservative spawn mode to try to debug a problem with the MongoDB ruby driver.

However, after I did this, Passenger can no longer find my gems. I get the application failed to start page with this message:

Missing these required gems: aws-s3 >= 0.6.2 ruby-units >= 1.1.3 mongo >= 0.15.1 You're running: ruby 1.8.6.111 at /opt/local/bin/ruby rubygems 1.3.5 at /Users/look/.gem/ruby/1.8, /opt/local/lib/ruby/gems/1.8 Run rake gems:install to install the missing gems.

I definitely have these gems installed in the gem paths menti开发者_开发技巧oned, and the app works in the default spawn mode.

I found this thread with the same problem on the Passenger mailing list, but there was no resolution.

Any ideas?

In environment.rb, you have to specify the lib (I think because of the hyphen in the gem name):

config.gem "aws-s3", :lib => "aws/s3"

You may want to make sure the two modes are using the same ruby/rubygems installation. Perhaps you could print out, emit, or otherwise log your load paths, which are in the variable $: (dollar colon) at some point above the gem initialization in environment.rb

Compare the output of that in the 2 modes to make sure they both include the same paths. If not, the issue is that conservative mode is picking up a different ruby/rubygems installation on your system.