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In an attempt to fix GH #1873, ("BUG/MEDIUM: stats: Rely on a local trash buffer to dump the stats") explicitly reduced output buffer size to leave enough space for htx overhead under http context. Github user debtsandbooze, who first reported the issue, came back to us and said he was still able to make the http dump "hang" with the new fix. After some tests, it became clear that htx_add_data_atonce() could fail from time to time in stats_putchk(), even if htx was completely empty: In http context, buffer size is maxed out at channel_htx_recv_limit(). Unfortunately, channel_htx_recv_limit() is not what we're looking for here because limit() doesn't compute the proper htx overhead. Using buf_room_for_htx_data() instead of channel_htx_recv_limit() to compute max "usable" data space seems to be the last piece of work required for the previous fix to work properly. This should be backported everywhere the aforementioned commit is.
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)