Q: When login, I got
   Cannot create connection pool, check log for detail.

A: This will happen if the application server (or the servlet engine) can not
   find the JDBC driver and failed to create the connection pool. The driver
   jar file(s) should be automatically copied into bugzero/WEB-INF/lib during
   Bugzero setup. If they are indeed there, then, restart the server will solve
   the problem.