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Phusion Passenger 4.0.44 released

By Hongli Lai on May 29th, 2014

Phusion Passenger is a fast and robust web server and application server for Ruby, Python, Node.js and Meteor. Passenger takes a lot of complexity out of deploying web apps, and adds powerful enterprise-grade features that are useful in production. High-profile companies such as Apple, New York Times, AirBnB, Juniper, American Express, etc are already using it, as well as over 350.000 websites.

Phusion Passenger is under constant maintenance and development. Version 4.0.44 is a bugfix release.

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

Version 4.0.43 has been skipped because a compilation problem on OS X Mountain Lion was found soon after the gem was pushed. The changes in 4.0.34 and 4.0.44 combined are as follows.

  • The issue tracker has now been moved from Google Code to Github. Before version 4.0.44 (May 29 2014, commit 3dd0964c9f4), all issue numbers referred to Google Code. From now on, all issue numbers will refer to Github Issues.
  • On Ruby, fixed nil being frozen on accident in some cases. See issue #1192.
  • Introduced a new command passenger-config list-instances, which prints all running Phusion Passenger instances.
  • Introduced a new command `passenger-config system-metrics, which displays metrics about the system such as the total CPU and memory usage.
  • Fixed some compilation problems caused by the compiler capability autodetector.
  • If you are a Union Station customer, then system metrics such as total CPU usage and memory usage, are now collected as well. This is in preparation for future features.

Installing or upgrading to 4.0.44

OS X OS X Debian Debian Ubuntu Ubuntu
Heroku Heroku Ruby gem Ruby gem Tarball Tarball


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

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