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e3957f83e0
The Lua tasks registered vi core.register_task() use a dangerous
task_schedule(task, now_ms) to start them, that will most of the
time work by accident, except when the time wraps every 49.7 days,
if now_ms is 0, because it's not valid to queue a task with an
expiration date set to TICK_ETERNITY, as it will fail all wakeup
checks and prevent all subsequent timers from being seen as expired.
The only solution in this case is to restart the process.
Fortunately for the vast majority of users it is extremely unlikely
to ever be met (only one millisecond every 49.7 days is at risk), but
this can be systematic for a process dealing with 1000 req/s, hence
the major tag.
The bug was introduced in 1.6-dev with commit 24f335340 ("MEDIUM: lua:
add coroutine as tasks."), so the fix must be backported to all stable
branches.
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)