A ResourcePool could not acquire a resource from its primary factory or source
I'm trying to connect to a database in Java, using jdbcTemplate and I'm gettin the error below. I have Googled for a long time and all solutions I found didn't solve my problem. I tried several different DBs (both SQLServer and MySQL) and none worked. SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/promotion-handler-admin] threw exception [Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!] with root cause com.mchange.v2.resourcepool