Why does my Tomcat only open 8 JDBC connections

Question

When setting up the database connections in Tomcat 8, for some reason Tomcat is not following what I configured in the context.xml, with as result that I run out of connecti

Answer 1

Quote from "Tomcat Expert: Configuring jdbc-pool for high-concurrency":

When Tomcat reads the type="javax.sql.DataSource" it will automatically configure its repackaged DBCP, unless you specify a different factory. The factory object is what creates and configures the connection pool itself.

It turns out that DBCP package just ignores a series of settings. Adding the following line to the context.xml resource configuration, gets better response in the database:

Show processlist in mysql then immediately shows the desired behaviour.