Apache Tomcat 7 displays blank page Mac OSX 10.9

After installing Apache Tomcat 7 using the following excellent tutorial,
http://wolfpaulus.com/jounal/mac/tomcat7/, the default page in http://localhost:8080 returned a blank page.

There can be several reasons that is causing this issue, and mine got fixed when I changed the default Tomcat port from 8080 to 8081 (It can be any available port) following http://www.mkyong.com/tomcat/how-to-change-tomcat-default-port/

To check the availability of ports and verify Tomcat is running in 8081, use the following command:
netstat -anf inet

The required change to change the port (In /conf/server.xml) in given below:

  port="8181" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" />

How to increase the no. of active connections in a JDBC connection pool?

What is a connection pool?

Connection pool handles the connections to a database requested from a particular web server process. It caches the database connections, so that connections can be reused thus improving the performance.

If you are running out of connections you will get the following server error:
"Host connection pool not found"

How to increase the number of connections in connection pool?

In "installation folder" \tomcat\conf\Catalina\localhost\ROOT.xml file set the maxActive attribute to the prefered value.