This release fixes a regression that appeared in 2.2.10 which only affects Apache. When under high load, Apache might freeze and stop responding to requests. The regression was caused by an attempt in 2.2.10 to fix various file descriptor passing problems. The fix introduced a race condition in one of the Phusion Passenger components, and since the problem only occurs under certain high-concurrency workloads it escaped our last release testing.
This problem does not affect Nginx; you only have to upgrade if you’re using Apache.
More information about the problem can be found at the following discussion thread: http://groups.google.com/group/phusion-passenger/t/d5bb2f17c8446ea0
How do I upgrade to 2.2.11?
Via a gem
Please install it with the following command:
gem install passenger
Next, run:
passenger-install-apache2-module
Or, if you’re an Nginx user:
passenger-install-nginx-module
Please don’t forget to copy & paste the Apache/Nginx config snippet that the installer gives you.
Via a native Linux package
John Leach from Brightbox has kindly provided an Ubuntu 8.04 package for Phusion Passenger. The package is available from the Brightbox repository which you can find at:
http://apt.brightbox.net
Add the following line to the Third Party Software Sources:
deb http://apt.brightbox.net hardy main
(The simplest way to do that is to create a file in /etc/apt/sources.list.d/ containing the deb instruction, and then run ‘apt-get update’).
Once you’ve done this then you can install Phusion Passenger by running:
sudo apt-get install libapache2-mod-passenger
-or-
sudo apt-get install nginx-brightbox
(Note that John is currently packaging 2.2.11, so it might take a while before this release shows up in the apt repository.)
Final
Phusion Passenger is provided to the community for free. If you like Phusion Passenger, please consider sending us a donation. Thank you!
http://blog.phusion.nl/2010/03/05/phusion-passenger-2-2-11-released/
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