I'm trying the dbpool example giving in Professional Java Server 
Programming, and can't get it to work properly.

It looks like the init method doesn't run and I can't figure out why. A 
db_v.isEmpty returns "true", so the Vector (db_v) is certainly not getting 
initialized. That (of course) gives me a NullPointerException when the 
Vector is called the first time.

I'm using JSDK2.0 and the servletrunner from there to test the servlet (and 
the examples from the JSDK runs fine).