HAProxy - Load balancer
Find a file
Willy Tarreau 90b2154d93 MEDIUM: muxes: always set conn->owner to the session that owns the connection
When an idle connection is private or considered private, session_add_conn()
is called to add it to the list of connections owned by the session. But
in case of allocation failure, the session is not set, which results in
a long list of possible situations that are all corner cases which are
difficult to test (and debug).

This commit relies on the fact that it is already permitted to have
conn->owner pointing to a session even if the connection couldn't be
added to the session's list, as this was already the case in
conn_backend_get() when dealing with HOL_RISK. Also as seen in commit
3aab17bd56 added in 2.4, it is already possible to have conn->owner
set with the connection not being in a list, and only the list element
is checked for this.

This commit modifies session_add_conn() to always set conn->onwer, even
if the list element couldn't be allocated. This way it's possible to
always refer to conn->owner to find the session owning a private conn
even in case of failure to allocate an entry. This requires to change
the checks on conn->owner to a check of the list element to see if the
connection belongs to a session, the pre-assignment of sess to
conn->owner in conn_backend_get() is no longer needed, same for the
pre-assignment in http_wait_for_response(), and that's all.

The H1 mux remained unchanged because since it cannot multiplex, in
case it fails to allocate a pconn, it instantly kills the connection.
2026-04-21 08:45:46 +02:00
.github CI: github: switch to USE_PCRE2 in Fedora Rawhide build 2026-04-20 14:29:14 +02:00
addons MINOR: otel: test: unified run scripts into a single symlinked script 2026-04-17 15:28:05 +02:00
admin CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc MINOR: acme: allow IP SAN in certificate request 2026-04-20 18:10:47 +02:00
examples EXAMPLES: ssl: keylog entries are greater than 1024 2026-04-14 16:24:28 +02:00
include MINOR: acme: allow IP SAN in certificate request 2026-04-20 18:10:47 +02:00
reg-tests REGTESTS: add QUIC test for max-total streams setting 2026-04-15 15:18:37 +02:00
scripts CI: VTest build with git clone + cache 2026-04-07 18:35:23 +02:00
src MEDIUM: muxes: always set conn->owner to the session that owns the connection 2026-04-21 08:45:46 +02:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES DOC: clarify the experimental status for certain features 2025-10-17 18:41:13 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev9 2026-04-15 17:59:00 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL MINOR: version: mention that it's development again 2025-11-26 16:11:47 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile BUILD: Makefile: don't forget to also delete haterm on make clean 2026-04-14 16:48:16 +02:00
README.md CI: github: add cross-zoo.yml in README.md 2026-04-20 11:47:20 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev9 2026-04-15 17:59:00 +02:00
VERSION [RELEASE] Released version 3.4-dev9 2026-04-15 17:59:00 +02:00

HAProxy

AWS-LC Illumos NetBSD CrossCompile FreeBSD VTest

HAProxy logo

HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.

Installation

The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.

Getting help

The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.

The issue tracker is only for bug reports or feature requests.

Documentation

The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.

Please refer to the following files depending on what you're looking for:

  • INSTALL for instructions on how to build and install HAProxy
  • BRANCHES to understand the project's life cycle and what version to use
  • LICENSE for the project's license
  • CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory:

License

HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.