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4a9e3e102e
This patch fixes the commit eea152ee68
("BUG/MINOR: signals/poller: ensure wakeup from signals").
There is some probability that run_poll_loop() becomes inifinite, if
TH_FL_SLEEPING is withdrawn from all threads in the second signal_queue_len
check, when a signal has received just after the first one.
In such particular case, the 'wake' variable, which is used to terminate
thread's poll loop is never reset to 0. So, we never enter to the "stopping"
part of the run_poll_loop() and threads, except the one with id 0 (tid 0
handles signals), will continue to call _do_poll() eternally and will never
sleep, as its TH_FL_SLEEPING flag was unset.
This flag needs to be removed only for the tid 0, as it was done in the first
signal_queue_len check.
This fixes an issue #2537 "infinite loop when shutting down".
This fix must be backported in every stable version.
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)