HTTP Status 500 – Internal Server Error


Type Exception Report

Message An exception occurred processing [/WEB-INF/jsp/my/lookup.jsp] at line [24]

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: An exception occurred processing [/WEB-INF/jsp/my/lookup.jsp] at line [24]

21: 
22: 
23: <%
24:     String name = UserManager.getInstance().getMyUser(request).getUsername();
25: %>
26: 
27: 


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:599)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:488)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:171)
	org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1415)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1159)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1098)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	edu.mcw.rgd.web.ChinchillaFilter.doFilter(ChinchillaFilter.java:24)

Root Cause

java.lang.NullPointerException: Cannot invoke "edu.mcw.rgd.datamodel.myrgd.MyUser.getUsername()" because the return value of "edu.mcw.rgd.security.UserManager.getMyUser(jakarta.servlet.http.HttpServletRequest)" is null
	org.apache.jsp.WEB_002dINF.jsp.my.lookup_jsp._jspService(lookup_jsp.java:169)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:456)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:171)
	org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1415)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1159)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1098)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	edu.mcw.rgd.web.ChinchillaFilter.doFilter(ChinchillaFilter.java:24)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/10.1.13