For some reason I get an internal server error message when trying to link up to Empathy game

This is the log:

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: /jsp/egame/index.jsp:125

122:

123:

124:

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:802)

net.sourceforge.stripes.controller.StripesFilter.doFilter(StripesFilter.java:246)

ng.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:102)

ng.filter.PlayerFilter.doFilter(PlayerFilter.java:95)

ng.filter.DbFilter.doFilter(DbFilter.java:40)

ng.filter.CompressionFilter.doFilter(CompressionFilter.java:238)

root cause

java.lang.NullPointerException

ng.db.Player.getCountryid(Player.java:485)

org.apache.jsp.jsp.egame.index_jsp._jspService(index_jsp.java:426)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

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:802)

net.sourceforge.stripes.controller.StripesFilter.doFilter(StripesFilter.java:246)

ng.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:102)

ng.filter.PlayerFilter.doFilter(PlayerFilter.java:95)

ng.filter.DbFilter.doFilter(DbFilter.java:40)

ng.filter.CompressionFilter.doFilter(CompressionFilter.java:238)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.

.

125:

126:

127:

128:

The lines that have 123: to 128: also have something that looks like HTML prototypes, in which the percent signs seem to mark places where content is to be generated by executable code. Judging by the “root cause” noted above, I'd guess the call to GetCountryid in the “PlayerFacade.getPlayer(plid).getCountryid()” threw a NullPointerException.

122:

123: .

124:

125:

126:   

127:

128:

Yes that's right. It's part of a JSP file (which are nothing else than servlets, but you don't have to always print or add the HTML stuff to a string buffer and print later). The are so called scriptlets and allow to write Java code in the JSP file (yes, JSP is like HTML with Java, servlets are like Java with HTML). And <%= are so called expressions, that are evaluated and inserted. The benefit of JSP is, that it allows you to seperate logic from presentation. It looks like getPlayer(plid) returned null and then obviously null.getCountryid() throws a null pointer exception. Well it doesn't help you, but maybe you find it interesting :)

Seems to work now.