struts-config.xml was changed from
<form-bean name="assignmentRequestForm"
type="org.apache.struts.action.DynaActionForm">
to
<form-bean name="assignmentRequestForm"
type="org.apache.struts.action.DynaValidatorForm">
Note the incorrect package name
which resulted in the ugly NPE below. An incorrect class name should result in an error message that helps you fix the problem.
14:49:51,817 - DEBUG org.apache.struts.chain.ComposableRequestProcessor - Using processing chain for this request 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.ExceptionCatcher 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.servlet.SelectLocale 14:49:51,817 - DEBUG org.apache.struts.chain.commands.AbstractSelectLocale - retrieve config... 14:49:51,817 - DEBUG org.apache.struts.chain.commands.AbstractSelectLocale - set context locale to en_US 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.servlet.RequestNoCache 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.servlet.SetContentType 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.servlet.SelectAction 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.servlet.AuthorizeAction 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.CreateActionForm 14:49:51,817 - DEBUG org.apache.struts.chain.commands.CreateActionForm - Look up form-bean assignmentRequestForm 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ExceptionCatcher - Attempting to handle a thrown exception 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ExceptionCatcher - Calling exceptionCommand 'servlet-exception' 14:49:51,817 - DEBUG org.apache.struts.chain.commands.ActionCommandBase - Executing org.apache.struts.chain.commands.servlet.ExceptionHandler 14:49:51,817 - DEBUG org.apache.struts.chain.commands.AbstractExceptionHandler - See if actionConfig ActionConfig[cancellable=falsepath=/requestAssignmentvalidate=true,input=request.assignment,name=assignmentRequestForm,parameter=default=unspecified,addStaff,deleteStaff,userAction,update,scope=session,type=edu.asu.vpia.benweb.EditAssignmentRequestAction has an exceptionConfig for java.lang.NullPointerException 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look locally for java.lang.NullPointerException 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look globally for java.lang.NullPointerException 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look locally for java.lang.RuntimeException 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look globally for java.lang.RuntimeException 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look locally for java.lang.Exception 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look globally for java.lang.Exception 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look locally for java.lang.Throwable 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look globally for java.lang.Throwable 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look locally for java.lang.Object 14:49:51,817 - DEBUG org.apache.struts.config.ActionConfig - findException: look globally for java.lang.Object 14:49:51,832 - WARN org.apache.struts.chain.commands.AbstractExceptionHandler - Unhandled exception java.lang.NullPointerException at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:286) at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:350) at org.apache.struts.chain.commands.CreateActionForm.execute(CreateActionForm.java:89) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:48) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:280) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:446) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.webapp.BenefactorAccessFilter.doFilter(BenefactorAccessFilter.java:236) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.LocalhostFilter.doFilter(LocalhostFilter.java:113) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.MaintenanceFilter.doFilter(MaintenanceFilter.java:125) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) 14:49:51,832 - WARN org.apache.struts.chain.commands.ExceptionCatcher - Exception from exceptionCommand 'servlet-exception' java.lang.NullPointerException at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:286) at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:350) at org.apache.struts.chain.commands.CreateActionForm.execute(CreateActionForm.java:89) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:48) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:280) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:446) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.webapp.BenefactorAccessFilter.doFilter(BenefactorAccessFilter.java:236) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.LocalhostFilter.doFilter(LocalhostFilter.java:113) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.MaintenanceFilter.doFilter(MaintenanceFilter.java:125) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) 14:49:51,832 - ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/benweb-dev].[action] - Servlet.service() for servlet action threw exception java.lang.NullPointerException at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:286) at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:350) at org.apache.struts.chain.commands.CreateActionForm.execute(CreateActionForm.java:89) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:48) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:280) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:446) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.webapp.BenefactorAccessFilter.doFilter(BenefactorAccessFilter.java:236) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.LocalhostFilter.doFilter(LocalhostFilter.java:113) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.MaintenanceFilter.doFilter(MaintenanceFilter.java:125) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) 14:49:51,832 - ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/benweb-dev].[action] - Servlet.service() for servlet action threw exception java.lang.NullPointerException at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:286) at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:350) at org.apache.struts.chain.commands.CreateActionForm.execute(CreateActionForm.java:89) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:48) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:280) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:446) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.webapp.BenefactorAccessFilter.doFilter(BenefactorAccessFilter.java:236) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.LocalhostFilter.doFilter(LocalhostFilter.java:113) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at edu.asu.vpia.benweb.MaintenanceFilter.doFilter(MaintenanceFilter.java:125) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595)