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If we cannot splice incoming data using rcv_pipe() due to remaining data in the buffer, we must not subscribe to the mux but instead tag the stream-int as blocked on missing Rx room. Otherwise when data are flushed, calling si_chk_rcv() will have no effect because the WAIT_EP flag remains present, and we'll end in an rx timeout. This case is very hard to reproduce, and requires an inversion of the polling side in the middle of a transfer. This can only happen when the client and the server are using similar links and when splicing is enabled. It typically takes hundreds of MB to GB for the problem to happen, and tends to be magnified by the use of option contstats which causes process_stream() to be called every 5s and to try again to recv. This fix must be backported to 2.1, 2.0, and possibly 1.9.
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)