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Since the commit1d2b586cd("MAJOR: htx: Enable the HTX mode by default for all proxies"), the HTX is enabled by default for all proxies, HTTP and TCP, but also CLI and HEALTH proxies. But when the best mux is retrieved, only HTTP and TCP modes are checked. If the TCP mode is not explicitly set, it is considered as an HTTP proxy. It is an hidden bug introduced when the option "http-use-htx" was added. It has no effect until the commit1d2b586cd. But now, when a stats socket is created for the master process, the mux h1 is installed on all incoming connections to the CLI proxy, leading to segfaults because HTX operations are performed on raw buffers. So to fix the buf, when a mux is installed, all proxies are considered as TCP proxies, except HTTP ones. This way, CLI and HEALTH proxies will be handled as TCP proxies. This patch must be backported to 1.9 although it has no effect. It is safer to not keep hidden bugs.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - 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 : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)