mperdikeas [https://community.jboss.org/people/mperdikeas] created the discussion "experimenting with JBoss 7 quickstart helloworld tutorial" To view the discussion, visit: https://community.jboss.org/message/742795#742795 -------------------------------------------------------------- I am coming from a Tomcat / JSF background so I did a little experimentation with the quickstart helloworld tutorial. Specifically I was curious as to the need for the beans.xml file which basically defines namespaces. Since the first helloworld example does not include any xhtml I thought the file is not needed and so I removed it. Not surprisingly I received an error when I tried to access the deployed application: java.lang.NullPointerException org.jboss.as.quickstarts.helloworld.HelloWorldServlet.doGet(Unknown Source) javax.servlet.http.HttpServlet.service(HttpServlet.java:734) javax.servlet.http.HttpServlet.service(HttpServlet.java:847) What I cannot fathom is how not defining XML namespaces which are not used results in a NullPointerException error. If anybody can shed some light this will help me improve my mental model and perhaps be able to decipher similarly cryptic messages in the future. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/742795#742795] Start a new discussion in Beginner's Corner at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]