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When a TCP to H2 upgrade is performed, the SF_IGNORE flag is set on the stream before killing it. This happens when a TCP/SSL client connection is routed to a HTTP backend and the h2 alpn detected. The SF_IGNORE flag was added for this purpose, to skip some processing when the stream is aborted before a mux upgrade. Some counters updates were skipped this way. But some others are still updated. Now, all counters update at the end of process_stream(), before releasing the stream, are ignored if SF_IGNORE flag is set. Note this stream is aborted because we switch from a mono-stream to a multi-stream multiplexer. It works differently for TCP to H1 upgrades. This patch should be backported as far as 2.0 after some observation period.
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)