Hello All,

I am facing this problem in production since a very long time now. Made several changes but it keeps surfacing. I need some help in isolating/identifying/understanding the actual cause of this problem. What can I do to analyze this issue. From where can I get more information about what Apache is doing or its state when it crashes. Any help is appreciated.

The problem:
==========
We have a Tomcat server (port 8080) running behind an Apache HTTP Server (port 80). Every once it a couple of weeks, the application just becomes unreachable when going through Apache. However the application can be reached by going directly to Tomcat i.e. by adding 8080 to the URL. Production users are not supposed to be using 8080, we have just kept it open for debugging purposes.

We have the following in the httpd.conf.

Timeout 120
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15

<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
</IfModule>

<IfModule worker.c>
StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>


..
..
..
JkOptions +ForwardURICompatUnparsed
JkMount /* tomcat

Linux or Windows?

linux - tail -f /usr/local/apache/logs/error_log