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By using the same "ret" variable in the "if" block to test the return value of pause(), the second one shadows the first one and when forcing the result to zero in case of an error, it doesn't do anything. The problem is that some listeners used to fail to pause in multi-process mode and this was not reported, but their failure was automatically resolved by the last process to pause. By properly checking for errors we might now possibly report a race once in a while so we may have to roll this back later if some users meet it. The test on ==0 is wrong too since technically speaking a total stop validates the need for a pause, but stops the listener so it's just the resume that won't work anymore. We could switch to stopped but it's an involuntary switch and the user will not know. Better then mark it as paused and let the resume continue to fail so that only the resume will eventually report an error (e.g. abns@). This must not be backported as there is a risk of side effect by fixing this bug, given that it hides other bugs itself.
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)