Changing the system time by -1 hour caused the calculation of the process activity score to be incorrect. This prevented the spawning of new application processes for approx 1 hour. FcgidTimeScore was set to default (1). FcgidSpawnScoreUpLimit was set to default (10). /var/log/messages Nov 3 19:42:58 server207-27 ntpd[5052]: synchronized to 213.171.201.6, stratum 2 Nov 3 18:42:58 server207-27 ntpd[5052]: time reset -3599.951366 s Nov 3 18:42:58 server207-27 ntpd[5052]: kernel time sync enabled 0001 ... /var/log/httpd/error_log [Thu Nov 03 18:57:37 2011] [info] mod_fcgid: /index.php spawn score 2534 >= 10, skip the spawn request [Thu Nov 03 18:57:38 2011] [info] mod_fcgid: /index.php spawn score 2533 >= 10, skip the spawn request ... /var/log/http/vhost/error_log [Thu Nov 03 19:25:58 2011] [warn] mod_fcgid: can't apply process slot for /index.php [Thu Nov 03 19:26:00 2011] [warn] mod_fcgid: can't apply process slot for /cometchat_receive.php ...
This is to be expected if you are changing absolute time. It causes havoc on other time-sensitive apps and services as well. If it happens due to a time zone change (local time) that is a defect. Could you clarify for us?
the logs suggest absolute time change the code in fcgid_spawn_ctl.c/register_life_death() ... /* Decrease the score based on elapsed time */ current_node->score -= sconf->time_score * (int)(apr_time_sec(now) - apr_time_sec(current_node->last_stat_time)); /* Make score reasonable */ if (current_node->score < 0) current_node->score = 0; current_node->last_stat_time = now; mod_fcgid can easly check for time going backward, this function Isn't used very often so I think it won't have any impact on performance
Created attachment 28573 [details] check for time going back
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