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4e047e7d0e
The "show resolvers" command is bogus, it tries to implement a yielding mechanism except that if it yields it restarts from the beginning, until it manages to fill the buffer with only line breaks, and faces error -2 that lets it reach the final state and exit. The risk is low since it requires about 50 name servers to reach that state, but it's not impossible, especially when using multiple sections. In addition, the extraneous line breaks, if sent over an interactive connection, will desynchronize the commands and make the client believe the end was reached after the first nameserver. This cannot be fixed separately because that would turn this bug into an infinite loop since it's the line feed that manages to fill the buffer and stop it. The fix consists in saving the current resolvers section into ctx.cli.p1 and the current nameserver into ctx.cli.p2. This should be backported, but that code moved a lot since it was introduced and has always been bogus. It looks like it has mostly stabilized in 2.4 with commit c943799c86 so the fix might be backportable to 2.4 without too much effort.
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)