Pentaho Kettle is not working for Vertica DB - pentaho

Question

I need to parse a CSV file and write the data to a Vertica database. The issue is that I get an error when I create a Vertica database connection in Spoon. The following is the error at the end of the post.
I tried copying the following two JAR files and adding them to libext/jdbc:
vertica-jdbc-4.1.14.jar and vertica-jdk5-6.1.2-0.jar
But the above didn't help. I am looking for pointers!
Error:
Error connecting to database [Vertica Dev] : org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database
Exception while loading class
com.vertica.jdbc.Driver
org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database
Exception while loading class
com.vertica.jdbc.Driver
at org.pentaho.di.core.database.Database.normalConnect(Database.java:366)

Answer 1

The two JAR files you copied are of two different versions of Vertica and do not use the same class.
vertica-jdk5-6.1.2-0.jar will expose com.vertica.jdbc.Driver whereas version 4 will expose com.vertica.Driver.
The error message thus makes obvious that Pentaho is looking for com.vertica.jdbc.Driver (version 5, thus). If it fails, it probably is because the JAR version 4 is loaded first.
Try to delete the version 4 only from the libext/jdbc, keep the version 5, and restart Pentaho.
On a side note, this class is hardcoded in Pentaho, so if you do need to use the JAR version 4 and feel adventurous, you just need to get the Pentaho source, update VerticaDatabaseMeta.java, and recompile.