This was lately reported to me (privately) with the root cause being
r1819855 ([1], present in 2.4.x too) setting workers_were_busy=1 when
connections_above_limit() is reached.
Before r1819855, the #connections limit (based on
AsyncRequestWorkerFactor) only caused listening sockets to be
"paused", while now it also causes existing keepalive connections to
be early terminated (see [2]), while the docs for
AsyncRequestWorkerFactor state that it only happens when "all workers
are busy".
Since (I think) there is no point in killing connections before it's
really needed (workers exhausted), I'm about to restore the original
behaviour with the attached patch, WDYT?
Regards;
Yann.
[1] https://github.com/apache/httpd/commit/49b0ef1e914369678dd7001ad78f88fac4c1802a#diff-895d7e9f8add746606c82027dabc04d4R2031
[2] https://github.com/apache/httpd/blob/trunk/server/mpm/event/event.c#L2208
r1819855 ([1], present in 2.4.x too) setting workers_were_busy=1 when
connections_above_limit() is reached.
Before r1819855, the #connections limit (based on
AsyncRequestWorkerFactor) only caused listening sockets to be
"paused", while now it also causes existing keepalive connections to
be early terminated (see [2]), while the docs for
AsyncRequestWorkerFactor state that it only happens when "all workers
are busy".
Since (I think) there is no point in killing connections before it's
really needed (workers exhausted), I'm about to restore the original
behaviour with the attached patch, WDYT?
Regards;
Yann.
[1] https://github.com/apache/httpd/commit/49b0ef1e914369678dd7001ad78f88fac4c1802a#diff-895d7e9f8add746606c82027dabc04d4R2031
[2] https://github.com/apache/httpd/blob/trunk/server/mpm/event/event.c#L2208
Attached Files:
-
workers_were_busy.diff (2.40 KB)