[jboss-user] [JBoss Seam] - ejb3trail persistence error

[mishelangelo]

whenever i try running jsp files that use session beans to access and retrieve persistent (o/r) entities, i get exceptions usu with root cause: NullPointerException on the line where the an entity should have been initialized from a method call to a session bean. 

  | HTTP Status 500 -
  | 
  | type Exception report
  | 
  | message
  | 
  | description The server encountered an internal error () that prevented it from fulfilling this request.
  | 
  | exception
  | 
  | org.apache.jasper.JasperException: Exception in JSP: /persistence/entitymanager/addfund.jsp:45
  | 
  | 42: 
  | 43: <%
  | 44:   // Collection <Fund> funds = cal.getFunds();
  | 45:   Collection funds = cal.getFunds();
  | 46: %>
  | 47: 
  | 48: There are <b><%=funds.size()%></b> funds in the database.<br/>
  | 
  | 
  | Stacktrace:
  | 	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
  | 	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
  | 	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  | 	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  | 	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 	org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 
  | root cause
  | 
  | java.lang.NullPointerException
  | 	org.apache.jsp.persistence.entitymanager.addfund_jsp._jspService(addfund_jsp.java:89)
  | 	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
  | 	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
  | 	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  | 	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  | 	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 	org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 
  | 
I dont see anything wrong with 

  | 45:   Collection funds = cal.getFunds();
  | 
in and of itself.... but what do i know....   :) 
Does anyone have any idea why? I'm kinda like a total j2ee newbie

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961453#3961453

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3961453