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3.3. Broker Application Response Failure

The broker host service is a Rails application that runs inside the Passenger service. There can be cases when the broker host service appears to be running, but in reality is not. If the Passenger service fails to start for some reason, the broker host service will not start, even if the httpd service is running. So even though the service openshift-broker start command reports success, the service may not actually be running.
Failures and problems with the Passenger service are logged in the /var/www/openshift/broker/httpd/logs/error_log file on the broker host, as shown in the following screen output: 
[Wed Oct 17 23:48:04 2012] [error] *** Passenger could not be initialized because of this error: Unable to start the Phusion Passenger watchdog (/usr/lib64/gems/exts/passenger-3.0.17/agents/PassengerWatchdog): Permission denied (13)
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This shows that the Passenger service has failed to start. This can be caused by dependency issues with the RubyGems package, which often occurs when Bundler attempts to regenerate the /var/www/openshift/broker/Gemfile.lock file.
Run the following commands to verify whether this problem exists: 
# cd /var/www/openshift/broker/
# bundle --local
 Could not find rack-1.3.0 in any of the sources
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This shows that the specified dependency was not found. Updating all Ruby gems, and restarting the openshift-broker service could resolve this issue.

3.3.1. Missing Gems with Validation Scripts
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When running validation scripts, you could also experience problems relating to Bundler and RubyGems dependencies. This is because the validation scripts, such as oo-admin-chk, use the broker Rails configuration and also depend on the /var/www/openshift/broker/Gemfile.lock file, as shown in the following sample output: 
# oo-admin-chk
 Could not find rack-1.3.0 in any of the sources
 Run `bundle install` to install missing gems.
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Restarting the openshift-broker service will regenerate the Gemfile.lock file, and could solve this issue. Be sure to run the yum update command before restarting the openshift-broker service.

Warning

Do not run the bundle install command as the output asks you to do. Running this command will download and install unsupported and untested software packages, resulting in problems with your OpenShift Enterprise installation.
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