Install Apache Commons DBCP on Centos 7 Server

Many Apache projects support interaction with a relational database. Creating a
new connection for each user can be time consuming (often requiring multiple
seconds of clock time), in order to perform a database transaction that might
take milliseconds. Opening a connection per user can be unfeasible in a
publicly-hosted Internet application where the number of simultaneous users can
be very large. Accordingly, developers often wish to share a "pool" of open

Views PHP causing internal server error

I have a number of views that work fine for the most part. When I attempt to add a Global PHP field, however, I get an internal server error (See This is on the main site (live). Views PHP works fine on (

Apache Hadoop Installation on Centos 7

Installed Apache Hadoop on Recommender Server following the following tutorials:

Opened necessary ports (Be sure to reload)
firewall-cmd --zone=public --add-port=8042/tcp --permanent
firewall-cmd --reload