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Leonhard Wimmer reported an interesting bug in github issue #1742. Servers in disabled proxies that are configured for resolution are still subscribed to DNS resolutions, but the LB algos are not initialized at all since the proxy is disabled, so when the server state changes, attempts to update its status cause a crash when the server's weight is recalculated via a divide by the proxy's total weight which is zero. This should be backported to all versions. Beware that before 2.5 or so, there's no PR_FL_DISABLED flag, instead px->disabled should be used (2.3-2.4) or PR_STSTOPPED for older versions. Thanks to Leonhard for his report and quick test! |
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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)