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Phusion Passenger 4.0.8 released

By Hongli Lai on July 9th, 2013

Phusion Passenger is a fast and robust web server and application server for Ruby, Python and Node.js. It works by integrating into Apache and Nginx and turning them into a fully-featured application server. It has high-profile users such as New York Times, AirBnB, Symantec, Pixar, etc, and comes with many features that make your life easier and your application perform better.

Phusion Passenger is under constant maintenance and development. Version 4.0.8 is a bugfix releases.

Phusion Passenger also has an Enterprise version which comes with a wide array of additional features. By buying Phusion Passenger Enterprise you will directly sponsor the development of the open source version.

Recent changes

  • Fixed a problem with graceful web server restarts. When you gracefully
    restart the web server, it would cause Phusion Passenger internal sockets
    to be deleted, thus causing Phusion Passenger to go down. This problem
    was introduced in 4.0.6 during the attempt to fix issue #910.
  • The PassengerRestartDir/passenger_restart_dir now accepts relative
    filenames again, just like in Phusion Passenger 3.x. Patch
    contributed by Ryan Schwartz.
  • Documentation updates contributed by Gokulnath Manakkattil.
  • [Enterprise] Fixed a license key checking issue on some operating systems,
    such as CentOS 6.

Installing 4.0.8

Quick install/upgrade

Phusion Passenger Enterprise users can download the Enterprise version of 4.0.8 from the Customer Area.

Open source users can install the open source version of 4.0.8 with the following commands:

gem install passenger

You can also download the tarball at the Release Archive page. We strongly encourage you to cryptographically verify files after downloading them.

In-depth instructions

In-depth installation and upgrade instructions can be found in the Installation section of the documentation. The documentation covers:

  • Detailed tarball installation instructions.
  • Detailed upgrade instructions.
  • Installation troubleshooting.
  • Installation through APT and YUM.

You can view the documentation online here:


Phusion Passenger’s core is open source. Please fork or watch us on Github. 🙂

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