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In the various takeover() methods, make sure we schedule the old tasklet on the old thread, as we don't want it to run on our own thread! This was causing a very rare crash when building with DEBUG_STRICT, seeing that either an FD's thread mask didn't match the thread ID in h1_io_cb(), or that stream_int_notify() would try to queue a task with the wrong tid_bit. In order to reproduce this, it is necessary to maintain many connections (typically 30k) at a high request rate flowing over H1+SSL between two proxies, the second of which would randomly reject ~1% of the incoming connection and randomly killing some idle ones using a very short client timeout. The request rate must be adjusted so that the CPUs are nearly saturated, but never reach 100%. It's easier to reproduce this by skipping local connections and always picking from other threads. The issue should happen in less than 20s otherwise it's necessary to restart to reset the idle connections lists. No backport is needed, takeover() is 2.2 only.
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)