I have CentOS installed on my server with Apache 2 installed through yum and the goal was to install the binaries for Tomcat 6 and make them talk to each other. After some googling, the best tutorial I found to configure tomcat through mod_jk was found here. I have attached the PDF of the instructions here.
After following the steps, I was easily able to create a worker and configure apache to forward the request to /examples to tomcat.
The next issue was how to configure virtual hosts so that I can host multiple websites, some handled by apache and others through tomcat. Following is the snippet of httpd.conf setting that needs to be updated to enable virtual hosting.


NameVirtualHost *:80
#
# NOTE: NameVirtualHost cannot be used without a port specifier
# (e.g. :80) if mod_ssl is being used, due to the nature of the
# SSL protocol.
#
#
# VirtualHost example:
# Almost any Apache directive may go into a VirtualHost container.
# The first VirtualHost section is used for requests without a known
# server name.
#
#<VirtualHost *:80>
#    ServerAdmin webmaster@dummy-host.example.com
#    DocumentRoot /www/docs/dummy-host.example.com
#    ServerName dummy-host.example.com
#    ErrorLog logs/dummy-host.example.com-error_log
#    CustomLog logs/dummy-host.example.com-access_log common
#</VirtualHost>
<VirtualHost *:80>
ServerAdmin webmaster@lalitmehta.com
ServerName www.lalitmehta.com
ErrorLog logs/lalitmehta.com-error_log
CustomLog logs/lalitmehta-access_log common
</VirtualHost>
<VirtualHost *:80>
ServerAdmin info@saiyam.com
ServerName rsspile.com
#   No need of DocumentRoot
ErrorLog logs/rsspile.com-error_log
CustomLog logs/rsspile.com-access_log common
JkMount /rss ajp13
JkMount /rss/* ajp13
</VirtualHost>


I do have two questions though:
1. since mod_jk.so is available for download for Linux, what advantage you get by compiling Apache and mod_jk from source? Most of the websites mention the need to compile the source. Let me know
2. How do I enable SSL on my server with the above configuration?

ulimit -n 2048

If you want to increase it by default, edit /etc/security/limits.conf and add

*    hard     nofile     2048
*    soft     nofile     2048

or if you want to increase it only for a certain user, set it as

userlogin    hard     nofile     2048
userlogin    soft     nofile     2048

#### XXX: END EDIT FOR MOD_REWRITE ####


#deletes all .svn files/folders
find . -name ".svn" -exec rm -rf {} \;


OR

#deletes all .svn folders
find . -name ".svn" -type d -exec rm -rf {} \;


Full story

Thanks!

# iptables -F
# iptables -t nat -F
# iptables -t mangle -F
# iptables -X

It is suggested either you redirect the port traffic using iptables .

# /sbin/iptables -A FORWARD -p tcp --destination-port 80 -j ACCEPT
# /sbin/iptables -t nat -A PREROUTING -j REDIRECT -p tcp
--destination-port 80 -to-port 8080
# /sbin/iptables-save

Please remember that in this case clients connecting from server itself have to connect to 8080 port itself.

OR

Another option is to use Apache as a front end to all requests and use modules to redirect to tomcat.

Note: The following example will increase the maximum number of files to 49,500 on your currently running system and will persist after rebooting.

fs.file-max = 49500

Then issue the following command to activate this change to your live system.
sysctl -p

For user level setting

Also, you should update /etc/security/limits.conf for the user.

myuser hard nofile 2048
myuser soft nofile 2048

Type this to see what it’s set at:

ulimit -a