HTTP Status 500 – Internal Server Error


Type Exception Report

Message java.lang.NullPointerException

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

Exception

javax.servlet.ServletException: java.lang.NullPointerException
	org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	uk.ac.bris.adt.olac.web.filters.OlacPopulateFilter.doFilter(OlacPopulateFilter.java:88)
	org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)

Root Cause

java.lang.NullPointerException
	uk.ac.bris.adt.olac.web.actions.AtoZAction.executeFacultyUnits(AtoZAction.java:170)
	uk.ac.bris.adt.olac.web.actions.AtoZAction.execute(AtoZAction.java:55)
	org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
	org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
	org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
	org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
	org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
	org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
	org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	uk.ac.bris.adt.olac.web.filters.OlacPopulateFilter.doFilter(OlacPopulateFilter.java:88)
	org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)

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


Apache Tomcat/8.5.50