I configured Guvnor to use an external RDBMS(MySQL), generater a new repository.xml, there is my info in Repository Configuration below:
MySQL Info
Driver: com.mysql.jdbc.Driver
URL: jdbc:mysql://localhost:3306/jbpm_demo
User: task
Password: task
after I replace the old repository.xml and restart Guvnor, I faliled to open "http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/Guvnor.jsp".
waiting for your answer. Thanks!