Pentaho Common Errors : Driver class 'org.gjt.mm.mysql.Driver' could not be found

Error Message
Error connecting to database [MySQLDev] : org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database
Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.
org.gjt.mm.mysql.Driver

Pentaho Big Data : Pig Script Executor

Apache Pig is a high level data analysis language capable of handling very high data volume. Ease of programming, parallelization, extensibility and optimization opportunities are some of the key features of this platform.

Pig Script Executor job entry step can be used to execute "Pig Latin" script on a Hadoop cluster.
Stepwise illustration on how to configure PDI "Pig Script Executor" is given below.