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qcs instances for bidirectional streams are inserted in <qcc.opening_list>. It is removed from the list once a full HTTP request has been parsed. This is required to implement http-request timeout. In case a stream is deleted before receiving full HTTP request, it also must be removed from <qcc.opening_list>. This was not the case on first implementation but has been fixed by the following patch : 641a65ff3cccd394eed49378c6ccdb8ba0a101a7 BUG/MINOR: mux-quic: remove qcs from opening-list on free This means that now a stream can be deleted from the list in two different functions. Sadly, as LIST_DELETE was used in both cases, nothing prevented a double-deletion from the list, even though LIST_INLIST was used. Both calls are replaced with LIST_DEL_INIT which is idempotent. This bug causes memory corruption which results in most cases in a segfault, most of times outside of mux-quic code itself. It has been found first by gabrieltz who reported it on the github issue #1903. Big thanks to him for his testing. This bug also causes failures on several 'M' transfer testcase of QUIC interop-runner. The s2n-quic client is particularly useful in this case as segfaults triggers were most of the times on the LIST_DELETE operation itself. This is probably due to its encapsulating of HEADERS frame with fin bit delayed in a following empty STREAM frame. This must be backported wherever the above patch is, 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)