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When MUX performs a graceful shutdown, quic_conn error code is set to a "no error" code which depends on the application layer used. However, this may overwrite a previous error code if quic_conn layer has detected an error on its side. In practice, this behavior has not been seen on production. In fact, it may have undesirable effect only if this error code modification happens between the quic_conn error detection and the emission of the CONNECTION_CLOSE, so it should be pretty rare. However, there is still a tiny possibility it may happen. To prevent this, first check that quic_conn error code is not set before setting it. Ideally, transport layer API should be adjusted to be able to set this without fiddling with the quic_conn directly. This should be backported up to 2.6.
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 - 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 : - 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)