You should not be using prefork unless you really, really need to. Assuming you are running 2.4.x, I would strongly suggest running the Event MPM. Your Timeout and KeepAliveTimeout values are also way too big; I'd recommend 5 and 2, respectively. > On Mar 1, 2017, at 4:19 AM, Jayaram Ponnusamy <jayaram.ponnusamy@xxxxxxxxx> wrote: > > Dear All, > > We are using 2 Apache & 2 Tomcat with LoadBalance. Everyday the site is goes down and restarting Apache & Tomcat only help to bring the site back. > > I could see below errors on WebServer's Error Log, when the "total children" count increased more than 200 then Apache is not responding. I have included my prefork configuration below. Kindly please help to resolve this issue. > > [Wed Mar 01 11:46:39 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 1 idle, and 464 total children > [Wed Mar 01 11:47:25 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 0 idle, and 507 total children > [Wed Mar 01 11:47:34 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 0 idle, and 522 total children > [Wed Mar 01 11:47:35 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 16 children, there are 3 idle, and 530 total children > [Wed Mar 01 11:48:22 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 0 idle, and 578 total children > [Wed Mar 01 11:48:23 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 16 children, there are 0 idle, and 586 total children > [Wed Mar 01 11:48:24 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 602 total children > [Wed Mar 01 11:48:25 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 634 total children > [Wed Mar 01 11:48:26 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 666 total children > [Wed Mar 01 11:48:27 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 698 total children > [Wed Mar 01 11:48:28 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 730 total children > [Wed Mar 01 11:48:29 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 762 total children > [Wed Mar 01 11:48:30 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 794 total children > [Wed Mar 01 11:48:31 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 826 total children > [Wed Mar 01 11:48:32 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 858 total children > [Wed Mar 01 11:48:33 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 890 total children > [Wed Mar 01 11:49:08 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 0 idle, and 944 total children > [Wed Mar 01 11:49:09 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 16 children, there are 2 idle, and 952 total children > [Wed Mar 01 11:50:14 2017] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 3 idle, and 934 total children > > > mod_jk.log > [Wed Mar 01 11:58:14 2017][24547:2663257856] [info] jk_open_socket::jk_connect.c (594): connect to 100.10.661.32:8009 failed (errno=110) > [Wed Mar 01 11:58:14 2017][24547:2663257856] [info] ajp_connect_to_endpoint::jk_ajp_common.c (922): Failed opening socket to (100.10.661.32:8009) (errno=110) > [Wed Mar 01 11:58:14 2017][24547:2663257856] [error] ajp_send_request::jk_ajp_common.c (1507): (live_svr) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=110) > [Wed Mar 01 11:58:14 2017][24547:2663257856] [info] ajp_service::jk_ajp_common.c (2447): (live_svr) sending request to tomcat failed (recoverable), because of error during request sending (attempt=1) > [Wed Mar 01 11:58:14 2017][24318:2663257856] [info] jk_open_socket::jk_connect.c (594): connect to 100.10.661.32:8009 failed (errno=110) > [Wed Mar 01 11:58:14 2017][24318:2663257856] [info] ajp_connect_to_endpoint::jk_ajp_common.c (922): Failed opening socket to (100.10.661.32:8009) (errno=110) > [Wed Mar 01 11:58:14 2017][24318:2663257856] [error] ajp_send_request::jk_ajp_common.c (1507): (live_svr) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=110) > [Wed Mar 01 11:58:14 2017][24318:2663257856] [info] ajp_service::jk_ajp_common.c (2447): (live_svr) sending request to tomcat failed (recoverable), because of error during request sending (attempt=1) > [Wed Mar 01 11:58:14 2017][24282:2663257856] [info] jk_open_socket::jk_connect.c (594): connect to 100.10.661.32:8009 failed (errno=110) > ------------------------------------------------------------------------------- > httpd.conf: > KeepAlive On > Timeout 300 > MaxKeepAliveRequests 100 > KeepAliveTimeout 15 > > <IfModule prefork.c> > StartServers 80 > ServerLimit 3500 > MaxClients 3500 > MaxRequestsPerChild 0 > </IfModule> > > mod_jk.conf: > <IfModule worker.c> > StartServers 6 > MaxClients 230 > MinSpareThreads 75 > MaxSpareThreads 150 > ThreadsPerChild 25 > MaxRequestsPerChild 0 > </IfModule> > > Daily 20K Plus People will visit our sites. Kindly please provide the solution to resolve this issue. > > -- > Thanks & Regards, > > Jayaram Ponnusamy > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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