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From Jim Jagielski <...@jaguNET.com>
Subject Re: [users@httpd] Apache Crashing Everyday
Date Wed, 01 Mar 2017 14:05:11 GMT
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@gmail.com> 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 
> 


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