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When using the peers feature a race condition could prevent a connection from being properly counted. When this connection exits it is being "uncounted" nonetheless, leading to a possible underflow (-1) of the conn_curr stick table entry in the following scenario : - Connect to peer A (A=1, B=0) - Peer A sends 1 to B (A=1, B=1) - Kill connection to A (A=0, B=1) - Connect to peer B (A=0, B=2) - Peer A sends 0 to B (A=0, B=0) - Peer B sends 0/2 to A (A=?, B=0) - Kill connection to B (A=?, B=-1) - Peer B sends -1 to A (A=-1, B=-1) This fix may be backported to all supported branches.
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 - 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)