The Apache HTTP Server Project is proud to announce the fifth public release of Apache 2.0. This is primarily a bug-fix release, including updates to the experimental caching module, the removal of several memory leaks, and fixes for several segfaults, one of which could have been used as a denial-of-service against mod_dav. A complete list of the changes since 2.0.40 is available at http://www.apache.org/dist/httpd/CHANGES_2.0.42.
Apache 2.0 offers numerous enhancements, improvements, and performance boosts over the 1.3 codebase. The most visible and noteworthy addition is the ability to run Apache in a hybrid thread/process mode on any platform that supports both threads and processes. This has been shown to improve the scalability of the Apache HTTP Server significantly in our testing. Apache 2.0 also includes support for filtered I/O. This allows modules to modify the output of other modules before it is sent to the client. We have also included support for IPv6 on any platform that supports IPv6. This version of Apache is known to work on many versions of Unix, BeOS, OS/2, Windows, and Netware. Because of the many advances in Apache 2.0, it is expected to perform equally well on all supported platforms. Apache 2.0 has been running on the apache.org website since December of 2000 and has proven to be very reliable. Apache has been the most popular web server on the Internet since April of 1996. The August 2002 Web Server Survey by Netcraft (see http://www.netcraft.com/survey/) found that more web servers were using Apache than any other software; Apache runs on more than 63% of the web servers on the Internet. We consider this release to be the best version of Apache available and encourage users of all prior versions to upgrade. When doing so, please keep in mind the following: This release is not binary-compatible with previous releases, so all modules need to be recompiled in order to work with this version. For example, a module compiled to work with 2.0.40 will not work with 2.0.42. If you intend to use Apache with one of the threaded MPMs, you must ensure that the modules (and the libraries they depend on) that you will be using are thread-safe. Please contact the vendors of these modules to obtain this information. For more information and to download the release tarballs, please visit http://httpd.apache.org/