Why do i get java.lang.VerifyError when loading a jdbc driver

[Clemens Tolboom]

Using JBoss the following error occurs.

17:44:44,203 ERROR [Engine] StandardContext[/sensor]CewolfServlet: (class: nl/tolboom/sensor/model/DBConnector, method: <init> signature: ()V) Unable to pop operand off an empty stack java.lang.VerifyError: (class: nl/tolboom/sensor/model/DBConnector, method: <init> signature: ()V) Unable to pop operand off an empty stack

    DBConnector() {
        try {
            Class.forName(DBFactory.getDriver());
        } catch (ClassNotFoundException e) {

This happens when a ServletContextListener calls this class.

Putting the Class.forName in a static {} block works but then it is not configurable through the web.xml config file.

Any suggestions are welcome,

tanx.

[Jeanne Boyarsky]

Clemens,
This sounds more like a JBoss/classpath issue, so I'm moving it to our JBoss forum.