The name of the driver class for the datasource is missing (Netbeans+ PostgreSql + Glassfish)

Question

I\'m trying to develop an EJB application using Netbeans 8 on a Postgres 9.2 db and Glassfish 4 server.

Once I created connection pool and JDBC resources in the glas

Answer 1

In my case I had to go to glassfish admin panel and change the driver class of Derby connection pool (under JDBC resources) to "org.apache.derby.jdbc.ClientDataSource"