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Acknowledgements ranges are used to build ACK frames. To avoid allocating too much such objects, a limit was set to 32(QUIC_MAX_ACK_RANGES) by this commit: MINOR: quic: Do not allocate too much ack ranges But there is an inversion when removing the oldest range from its tree. eb64_first() must be used in place of eb64_last(). Note that this patch only does this modification in addition to rename <last> variable to <first>. This bug leads such a h2load command to block when a request ends up not being acknowledged by haproxy even if correctly served: /opt/nghttp2/build/bin/h2load --alpn-list h3 -t 1 -c 1 -m 1 -n 100 \ https://127.0.0.1/?s=5m There is a remaining question to be answered. In such a case, haproxy refuses to reopen the stream, this is a good thing but should not haproxy ackownledge the request (because correctly parsed again). Note that to be easily reproduced, this setting had to be applied to the client network interface: tc qdisc add dev eth1 root netem delay 100ms 1s loss random Must be backported as far as 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)