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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. If a qcs instance is freed before receiving a full HTTP request, it must be removed from the <qcc.opening_list>. Else a segfault will occur in qcc_refresh_timeout() when accessing a dangling pointer. For the moment this bug was not reproduced in production. This is because there exists only few rare cases where a qcs is freed before HTTP request parsing. However, as error detection will be improved on H3, this will occur more frequently in the near future. This must 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)