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Release 2.2.12
* Improved Bundler support.
Previous versions might not be able to correctly load gems bundled
by Bundler. We've also documented how our Bundler support works and
how to override our support if you need special behavior.
Please refer to the Phusion Passenger Users Guide, section
"Bundler support".
* Worked around some user account handling bugs in Ruby. Issue #192.
* Fixed some Ruby 1.9 tempfile.rb compatibility problems.
* Fixed some compilation problems on some ARM Linux platforms.
* [Apache] Suppress bogus mod_xsendfile-related error messages.
When mod_xsendfile is being used, Phusion Passenger might print
bogus error messages like "EPIPE" or "Apache stopped forwarding
the backend's response" to the log file. These messages are
normal, are harmless and can be safely ignored, but they pollute
the log file. So in this release we've added code to suppress
these messages when mod_xsendfile is being used. Issue #474.
* [Nginx] Fixed "passenger_user_switching off" permission problems
If Nginx is running as root and passenger_user_switching is turned
off, then Phusion Passenger would fail to initialize because of
a permission problem. This has been fixed. Issue #458.
Release 2.2.11
* 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. It is caused by a race conditions which is
why it escaped our last release testing.
This problem does not affect Nginx; you only have to upgrade if
you're using Apache.
Release 2.2.10
* Fixed some Bundler compatibility problems.
* Fixed some file descriptor passing problems, which previously
could lead to mysterious crashes.
* Fixed some compilation problems on newer GCC versions. Issue #430.
* Support #size method in rack.input.
Release 2.2.9
* Fixed compatibility with Rails 3.
Actually, previous Phusion Passenger releases were already compatible
with Rails 3, depending on the spawn method that would be invoked. Here's
the story:
Since Phusion Passenger 2.2.8, when the file exists, Phusion
Passenger will treat the app as a Rack app, not as a Rails app. This is
in contrast to earlier versions which gave Rails detection more priority
than Rack detection. Phusion Passenger loads Rack apps and Rails apps in
different ways. The Rails loader was not compatible with Rails 3, which
is what we've fixed in this release.
That said, a Rails 3 app would have worked out-of-the-box on Phusion
Passenger 2.2.8 as well because Rails 3 apps include a file
by default, causing Phusion Passenger 2.2.8 to use the Rack loader.
Earlier versions of Phusion Passenger would just completely bail out
because they'd use the Rails loader.
That said, with 2.2.9 there are still some caveats:
- Smart spawning (the mechanism with which REE's 33% memory reduction
is implemented) is *not* supported for Rack apps. This means that if
you want to utilize smart spawning with Rails 3, then you should
remove your file.
- Rails 3 depends on Rack 1.1.0. You must have Rack 1.1.0 installed as
a gem, even if you've bundled it with the gem bundler. This is because
Phusion Passenger itself depends on Rack.
Both of these caveats are temporary. We have plans to solve both of these
properly in the future.
* What's up with the Gem Bundler?
There has been some reports that Phusion Passenger is not compatible with
Yehuda Katz's gem bundler ( This might
have been true for an earlier version of the gem bundler, but the latest
version seems to work fine. Please note that you need to insert the
following snippet in config/preinitializer.rb, as instructed by the gem
bundler's README:
require "#{RAILS_ROOT}/vendor/gems/environment"
The Rails::Boot monkey patching code as posted at
does not seem to be required anymore.
* Fixed support for ActiveRecord subclasses that connect to another database.
ActiveRecord subclasses that connect to a database other than the default
one did not have their connection correctly cleared after forking.
This can result in weird errors along the lines of "Lost connection to
MySQL server during query". Issue #429.
* [Nginx] Fixed PCRE URL.
passenger-install-nginx-module downloads PCRE 7.8 if PCRE is not already
installed. However PCRE 7.8 has been removed from their FTP server,
so we've updated the URL to point to the latest version, 8.0.
Release 2.2.8
* [Nginx] Fixed some signal handling problems.
Restarting Nginx on OS X with SIGHUP can sometimes take a long time or
even fail completely. This is because of some signal handling problems,
which have now been fixed.
* [Nginx] Added OpenSSL as dependency.
OpenSSL is required in order to install Nginx, but this was not checked
by passenger-install-nginx-module. As a result,
passenger-install-nginx-module fails on e.g. out-of-the-box Ubuntu
installations until the user manually installs OpenSSL. Issue #422.
* [Nginx] Fixed support for internal redirects and subrequests.
It is now possible to, for example, point X-Accel-Redirects to Phusion
Passenger-served URLs. Patch contributed by W. Andrew Loe III: issue #433.
* [Apache] Fixed a GnuTLS compatibility issue.
mod_gnutls can cause Phusion Passenger to crash because of an unchecked
NULL pointer. This problem has now been fixed: issue #391.
* Fixed thread creation issue on Intel Itanium platforms.
This fixes issue #427.
* Fixed compilation problems on Linux running on the Renesas SH4 CPU.
Patch contributed by iwamatsu: issue #428.
* The Rack library has been unvendored.
The original reason for vendoring was to work around broken Rails
applications that explicitly specify Rack as a gem dependency. We've
found a better workaround that does not require vendoring Rack.
This also fixes a compatibility problem with Rails 3, because Rails
3 depends on a newer Rack version than the one we had vendored.
Issue #432.
* Fixed compatibility with Ruby 1.9.1 patchlevel >= 152
Ruby 1.9.1 patchlevel >= 152 has a bug in its tempfile library. If you've
seen an error message along the lines of
*** Exception IOError in Passenger RequestHandler (closed stream)
then this is a Ruby bug at work. This bug has been fixed in Ruby 1.9.2,
but Ruby 1.9.1 still contains this bug. We've added a workaround so that
the bug is not triggered with this Ruby version. Issue #432.
Release 2.2.7
* Removed forgotten debugging code in passenger-install-apache2-module,
which caused it not to compile anything.
Release 2.2.6
* Some /tmp cleaner programs such as tmpwatch try to remove subdirectories
in /tmp/ after a while because they think those
subdirectories are unused. This could cause Phusion Passenger to
malfunction, requiring a web server restart. Measures have now been
taken to prevent those tmp cleaner programs from removing anything
in /tmp/ Issue #365.
* When autodetecting the application type, Rack is now given more priority
than Rails. This allows one to drop a file in a Rails directory
and have it detected as a Rack application instead of a Rails application.
Patch contributed by Sam Pohlenz: issue #338.
* The default socket backlog has been increased from 'SOMAXCONN' (which
is 128 on most platforms) to 1024. This should fix most
'helper_server.sock failed: Resource temporarily unavailable'
* Fixed compilation problems on Solaris. Issue #369 and issue #379.
* Fixed crashes on PowerPC.
* Some Ruby 1.9 compatibility fixes. Issue #398.
* The installer now displays correct dependency installation instructions
for Mandriva Linux.
* [Apache] The location of the 'apxs' and 'apr-config' commands can now
also be passed to the installer through the --apxs-path and
--apr-config-path parameters, in addition to the $APXS2 and $APR_CONFIG
environment variables. Issue #3.
* [Nginx] Various problems that only occur on 64-bit platforms have been fixed.
* [Nginx] The installer now installs Nginx 0.7.64 by default.
Release 2.2.5
* [Apache] Small file uploads are now buffered; fixes potential DoS attack
Phusion Passenger buffers large file uploads to temp files so that it
doesn't block applications while an upload is in progress, but it sent
small uploads directly to the application without buffering it. This could
result in a potential DoS attack: the client can send many small, incomplete
file uploads to the server, and this would block all application processes
until a timeout occurs. In order to solve this problem, Phusion Passenger
now buffers small file uploads in memory. Bug #356.
* [Apache] Fixed support for mod_rewrite passthrough rules
Mod_rewrite passthrough rules were not properly supported because of a bug
fix for supporting encoded slashes (%2f) in URLs. Unfortunately, due to
bugs/limitations in Apache, we can support either encoded slashes or
mod_rewrite passthrough rules, but not both; supporting one will break the
Support for mod_rewrite passthrough rules is now enabled by default; that
is, support for encoded slashes is disabled by default. A new configuration
option, "PassengerAllowEncodedSlashes", has been added. Turning this option
on will enable support for encoded slashes and disable support for
mod_rewrite passthrough rules.
Issue #113 and issue #230.
* [Apache] Added a configuration option for resolving symlinks in the document root path
Phusion Passenger 2.2.0 and higher no longer resolves symlinks in
the document root path in order to properly support Capistrano-style
directory structures. The exact behavior is documented in the Users Guide,
section "How Phusion Passenger detects whether a virtual host is a web
However, some people relied on the old behavior. A new configuration option,
PassengerResolveSymlinksInDocumentRoot, has been added to allow reverting
back to the old behavior.
Patch contributed by Locaweb (
* [Apache] mod_env variables are now also passed through CGI environment headers
Prior to version 2.2.3, environment variables set by mod_env are passed to
the application as CGI environment headers, not through Ruby's ENV variable.
In the last release we introduced support for setting ENV environment
variables with mod_env, and got rid of the code for setting CGI environment
headers. It turns out that some people relied on the old behavior, we so now
environment variables set with mod_env are set in both ENV and in the CGI
Fixes bug #335.
* [Apache] Fixed compilation problems on some Linux systems with older versions of Apache
If you used to see compilation errors like this:
ext/apache2/Configuration.cpp:554: error: expected primary-expression before '.' token
then this version should compile properly.
* [Apache] Fixed I/O timeouts for communication with backend processes
Got rid of the code for enforcing I/O timeouts when reading from or writing to
a backend process. This caused more problems than it solved.
* [Nginx] Support for streaming responses (e.g. Comet or HTTP push)
Buffering of backend responses is now disabled. This fixes support for
streaming responses, something which the Apache version has supported
for a while now. One can generate streaming responses in Ruby on Rails
like this:
render :text => lambda { |response, output|
10_000.times do |i|
output.write("hello #{i}!\n")
* [Nginx] Installer now installs Nginx 0.7.61 by default
Previously it installed 0.6.37 by default.
* [Nginx] Fixed the installer's --extra-configure-flags flag when combined with --auto-download
Arguments passed to --extra-configure-flags were not being passed to the
Nginx configure script when --auto-download is given. This has been
fixed: bug #349.
* [Nginx] Fixed unnecessary download of PCRE
The installer now checks whether PCRE is installed in /opt/local (e.g.
MacPorts) as well before concluding that it isn't installed and going ahead
with downloading PCRE.
* Fixed STDERR capturing
While spawning an application, Phusion Passenger captures any output written
to STDERR so that it can show them later if the application failed to start.
This turns out to be much more difficult than expected, with all kinds of
corner cases that can mess up this feature.
For example, if the Rails log file is not writable, then this can cause
Rails to crash with a bizarre and unhelpful error message whenever it tries
to write to STDERR:
/!\ FAILSAFE /!\ Thu Aug 20 14:58:39 +1000 2009
Status: 500 Internal Server Error
undefined method `[]' for nil:NilClass
Some applications reopen STDERR to a log file. This didn't work.
Of all of these problems have been fixed now. (Bug #332)
* Fixed some bugs in application sources preloading
Rails >= 2.2 already preloads the application sources, in which case Phusion
Passenger wasn't supposed to perform it's own preloading, but the Rails
>= 2.2 detection code was bugged. This has been fixed.
Rails < 2.2 doesn't preload the application sources by itself, but there
should be a certain order with which the sources are preloaded, otherwise
preloading could fail in some applications. We now enforce a specific load
order: first models, then controllers, then helpers.
Bug #359.
* Fixed a few bugs in WSGI compliance
PATH_INFO is supposed to be set to the request URI, but without the query
string and without the base URI. This has been fixed: bug #360.
* Fixed some Ruby 1.9-specific crashes caused by encoding issues. Bug #354.
* Fixed loading of config/environment.rb on Ruby 1.9.2, because Ruby 1.9.2
no longer has "." in the default load path. Patch by metaljastix, issue #368.
* The Users Guide for Apache now mentions something about correct permissions
for application directories.
* Fixed compilation problems on IA-64 (bug #118). We also reduced the stack
sizes for the threads by half, so Phusion Passenger should use even less
virtual memory now.
* Fixed compilation problems on Linux systems with ARM CPU.
* Fixed a few compatibility problems with 64-bit OpenBSD.
* Fixed a few typos and minor bugs.
Older releases
Please consult the blog posts on for the information about older releases.