Hibernate query timeout exception - I can't save data to the database - java

I would like to save an article, but i got an exception. I don't know what do I do wrong.
I have three entities: User.class, Category.class and Article.class.
User has these atributes:
id
name
email
password
List of articles (One-To-Many)
Category has these atributes:
id
name
List of categories (Many-To-Many)
Article has these attributes:
id
title
content
publishDate
User (Many-To-One)
List of categories (Many-To-Many)
There are my controller and JSP file.
ArticleController.class
#Controller
public class ArticleController {
#Autowired
ArticleService articleService;
#Autowired
CategoryService categoryService;
#Autowired
UserService userService;
#ModelAttribute("article")
public Article construct(){
return new Article();
}
#RequestMapping("/admin/clanky")
public String articles(Model model){
model.addAttribute("articles", articleService.findAll());
model.addAttribute("categories", categoryService.findAll());
model.addAttribute("users", userService.findAll());
return "articles";
}
#RequestMapping(value="/admin/clanky", method=RequestMethod.POST)
public String saveArticle(#ModelAttribute("article") Article article, BindingResult result){
Date publishDate = new Date();
article.setPublishDate(publishDate);
articleService.save(article);
return "redirect:/admin/clanky.html?success=true";
}
#InitBinder
public void initBinder(WebDataBinder webDataBinder) {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm");
dateFormat.setLenient(false);
webDataBinder.registerCustomEditor(Date.class, "publishDate",
new CustomDateEditor(dateFormat, false));
}
#InitBinder
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) throws Exception {
binder.registerCustomEditor(Integer.class, new CustomNumberEditor(
Integer.class, true));
}}
article.jsp
<form:form commandName="article" cssClass="form-horizontal">
<div class="form-group">
<form:hidden path="id" class="form-control input-sm" />
</div>
<div class="form-group">
<label for="title" class="col-sm-2 control-label">Title:</label>
<div class="col-sm-10">
<form:input path="title" cssClass="form-control" />
</div>
</div>
<div class="form-group">
<label for="content" class="col-sm-2 control-label">Content:</label>
<div class="col-sm-10">
<form:textarea path="content" cssClass="form-control" rows="10" />
</div>
</div>
<div class="form-group">
<label for="publishDate" class="col-sm-2 control-label">Category:</label>
<div class="col-sm-10">
<form:select path="categories" cssClass="form-control">
<c:forEach items="${categories}" var="category">
<form:option class="form-control" value="${category.id}">${category.name}</form:option>
</c:forEach>
</form:select>
</div>
</div>
<div class="form-group">
<label for="user" class="col-sm-2 control-label">User:</label>
<div class="col-sm-10">
<form:select path="user.id" cssClass="form-control">
<c:forEach items="${users}" var="user">
<form:option class="form-control" value="${user.id}">${user.name}</form:option>
</c:forEach>
</form:select>
</div>
</div>
<div class="form-group">
<div class="col-sm-2">
<input type="submit" value="Uložit" class="btn btn-lg btn-primary">
</div>
</div>
Could anyone help me, please?
There is a stack trace:
HTTP Status 500 - Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/QueryTimeoutException
type Exception report
message Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/QueryTimeoutException
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/QueryTimeoutException
org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1284)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:965)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:232)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
java.lang.NoClassDefFoundError: org/hibernate/QueryTimeoutException
org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:644)
org.springframework.orm.hibernate3.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:799)
org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:669)
org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:478)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:272)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
com.sun.proxy.$Proxy21.save(Unknown Source)
cz.michalsipek.blog.controller.ArticleController.saveArticle(ArticleController.java:55)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:232)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
java.lang.ClassNotFoundException: org.hibernate.QueryTimeoutException
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:644)
org.springframework.orm.hibernate3.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:799)
org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:669)
org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:478)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:272)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
com.sun.proxy.$Proxy21.save(Unknown Source)
cz.michalsipek.blog.controller.ArticleController.saveArticle(ArticleController.java:55)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:232)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)


It looks to me like you are using Hibernate 3.x. If this is the case, I would make sure you are on version 3.6.10+ of Hibernate core. Older versions may not have the necessary class definition that the spring framework is looking for. The following link shows Hibernate 3.6.10 has the class definition you are missing: http://tool.oschina.net/uploads/apidocs/hibernate-3.6.10/org/hibernate/QueryTimeoutException.html


I've got the same error when saving de object. Well It's weird but apparently hibernate doesn't understand 0 (zero) as a value for #Id columns. I was trying to save a referenced object and its #Id value was 0. So I changed the id value to 1 and it worked =S

Related

JSP ForEach usage

I developed an application which fetchs data from database by hibernateORM.As error says there's a mistake on my foreachloop in jsp file.I didn't understand whats wrong. Name "students" is model name where I created StudentController class.I have Student Class where I put private variables with getters and setters.
JSP File
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div>
<h2>Student List</h2>
</div>
<div>
<table>
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Email Address</th>
</tr>
<c:forEach var="tempStudent" items="${students}">
<tr>
<td>${tempStudent.firstName}</td>
<td>${tempStudent.lastName}</td>
<td>${tempStudent.email}</td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>
Error
HTTP Status 500 - An exception occurred processing JSP page /WEB-INF/view/list-student.jsp at line 24
type Exception report
message An exception occurred processing JSP page /WEB-INF/view/list-student.jsp at line 24
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/view/list-student.jsp at line 24
21: </tr>
22: <c:forEach var="tempStudent" items="${students}">
23: <tr>
24: <td>${tempStudent.firstName}</td>
25: <td>${tempStudent.lastName}</td>
26: <td>${tempStudent.email}</td>
27: </tr>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:574)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:170)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1325)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1069)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
javax.el.PropertyNotFoundException: Property 'firstName' not found on type com.timucin.springdemo.entity.Student
javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:268)
javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:221)
javax.el.BeanELResolver.property(BeanELResolver.java:355)
javax.el.BeanELResolver.getValue(BeanELResolver.java:95)
org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110)
org.apache.el.parser.AstValue.getValue(AstValue.java:169)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:943)
org.apache.jsp.WEB_002dINF.view.list_002dstudent_jsp._jspx_meth_c_005fforEach_005f0(list_002dstudent_jsp.java:186)
org.apache.jsp.WEB_002dINF.view.list_002dstudent_jsp._jspService(list_002dstudent_jsp.java:140)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:170)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1325)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1069)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.36 logs.
Apache Tomcat/8.0.36

Getting Neither BindingResult nor plain target object for bean name error

Trying to make edit button go to another jsp and populate the Spring form. When I press the edit button on main page, it loads first part which is non-form and then shows the exception, failing to fillout form.
This is the jsp that shows the address data accordingly - addressesListDisplay.jsp:
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%# taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<html>
<head>
<title>Spring MVC Hello World</title>
</head>
<style type="text/css">
<%# include file="/resources/bootstrap-3.3.7-dist/css/bootstrap.css" %>
</style>
<body>
<div align="center">
<h2>All Addresses in System</h2>
<table class="table table-bordered">
<tr>
<th>Id</th>
<th>Street</th>
<th>Street No</th>
<th>City</th>
<th>Action</th>
</tr>
<c:forEach var="address" items="${listAddress}" varStatus="status">
<tr>
<td>${status.index + 1}</td>
<td>${address.street}</td>
<td>${address.streetNo}</td>
<td>${address.city}</td>
<td>
Edit
Delete2
</td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>
The jsp that shows the error because it cannot find the bean, addressForm.jsp:
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%# taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>New/Edit Address</title>
</head>
<style type="text/css">
<%# include file="/resources/bootstrap-3.3.7-dist/css/bootstrap.css" %>
</style>
<body>
<div align="center">
<h1>New/Edit Address</h1>
<form:form action="saveAddress" method="post" modelAttribute="address">
<table>
<form:hidden path="id"/>
<tr>
<td>Street:</td>
<td><form:input path="street" /></td>
</tr>
<tr>
<td>StreetNo:</td>
<td><form:input path="streetNo" /></td>
</tr>
<tr>
<td>City:</td>
<td><form:input path="city" /></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="Save"></td>
</tr>
</table>
</form:form>
</div>
</body>
</html>
Part of controller that controls the editing, AddressController.java:
#RequestMapping(value="/addressEdit", method = RequestMethod.GET)
public ModelAndView editAddress(HttpServletRequest request) {
int addressID = Integer.parseInt(request.getParameter("id"));
Address address = addressDAO.get(addressID);
ModelAndView model = new ModelAndView("addressForm");
model.addObject("address", address);
return model;
}
If there are anymore parts needed for more info please let me know.
Error trace:
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'address' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:154)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:141)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:132)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:116)
at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:422)
at org.springframework.web.servlet.tags.form.HiddenInputTag.writeTagContent(HiddenInputTag.java:79)
at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
at org.apache.jsp.WEB_002dINF.views.addressForm_jsp._jspx_meth_form_005fhidden_005f0(addressForm_jsp.java:7013)
at org.apache.jsp.WEB_002dINF.views.addressForm_jsp._jspx_meth_form_005fform_005f0(addressForm_jsp.java:6950)
at org.apache.jsp.WEB_002dINF.views.addressForm_jsp._jspService(addressForm_jsp.java:6902)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:720)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1257)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
sij 16, 2017 5:23:12 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [SpringDispatcher] in context with path [/croz-web] threw exception [java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'address' available as request attribute] with root cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'address' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:154)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:141)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:132)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:116)
at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:422)
at org.springframework.web.servlet.tags.form.HiddenInputTag.writeTagContent(HiddenInputTag.java:79)
at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
at org.apache.jsp.WEB_002dINF.views.addressForm_jsp._jspx_meth_form_005fhidden_005f0(addressForm_jsp.java:7013)
at org.apache.jsp.WEB_002dINF.views.addressForm_jsp._jspx_meth_form_005fform_005f0(addressForm_jsp.java:6950)
at org.apache.jsp.WEB_002dINF.views.addressForm_jsp._jspService(addressForm_jsp.java:6902)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:720)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1257)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

Running imported Getting Started project accessing facebook data appears NullPointerException

I use Eclipse and Tomcat plugin installed. I imported Spring Getting Started project to access facebook data. Facebook application was registered. Application.properties are setted. Classes are compiled.
I run this project with
mvn spring-boot:run
and all is OK. DispatherServlet is initiated. But if I open http://localhost:8080 I get error
2015-07-16 14:02:38.158 ERROR 2248 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy42.isAuthorized(Unknown Source)
at hello.HelloController.helloFacebook(HelloController.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
etc. What should I do? Please help me!
Below there are Application.java
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
HelloController.java
package hello;
import javax.inject.Inject;
import org.springframework.social.facebook.api.Facebook;
import org.springframework.social.facebook.api.PagedList;
import org.springframework.social.facebook.api.Post;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
#Controller
#RequestMapping("/")
public class HelloController {
private Facebook facebook;
#Inject
public HelloController(Facebook facebook) {
this.facebook = facebook;
}
#RequestMapping(method=RequestMethod.GET)
public String helloFacebook(Model model) {
if (!facebook.isAuthorized()) {
return "redirect:/connect/facebook";
}
model.addAttribute(facebook.userOperations().getUserProfile());
PagedList<Post> homeFeed = facebook.feedOperations().getHomeFeed();
model.addAttribute("feed", homeFeed);
return "hello";
}
}
hello.html
<html>
<head>
<title>Hello Facebook</title>
</head>
<body>
<h3>Hello, <span th:text="${facebookProfile.name}">Some User</span>!</h3>
<h4>Here is your home feed:</h4>
<div th:each="post:${feed}">
<b th:text="${post.from.name}">from</b> wrote:
<p th:text="${post.message}">message text</p>
<img th:if="${post.picture}" th:src="${post.picture}"/>
<hr/>
</div>
</body>
</html>
facebookConnect.html
<html>
<head>
<title>Hello Facebook</title>
</head>
<body>
<h3>Connect to Facebook</h3>
<form action="/connect/facebook" method="POST">
<input type="hidden" name="scope" value="read_stream" />
<div class="formInfo">
<p>You aren't connected to Facebook yet. Click the button to connect this application with your Facebook account.</p>
</div>
<p><button type="submit">Connect to Facebook</button></p>
</form>
</body>
</html>
and facebookConnected.html
<html>
<head>
<title>Hello Facebook</title>
</head>
<body>
<h3>Connected to Facebook</h3>
<p>
You are now connected to your Facebook account.
Click here to see some entries from your Facebook home feed.
</p>
</body>
</html>

Please use the following in your pom.xml . I had the same problem using 1.2.4.RELEASE and 1.2.5.RELEASE as boot-starter-parent.
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.3.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>

HTTP Status 500: org.apache.jasper.JasperException: java.lang.NullPointerException

there is a code of my jsp:
<%if (session.getAttribute("login") == null) {%>
<div id="login">
<div class="loginContent">
<form action="connexion" method="POST" id="login_frm">
<label ><b>Username: </b></label>
<input class="field" type="text" id="log" name="login" value="" size="23" />
<label ><b>Password:</b></label>
<input class="field" type="password" id="pwd" size="23" />
<input type="submit" value="" class="button_login" />
</form>
<div class="left">
<label for="rememberme"><input name="rememberme" id="rememberme" class="rememberme" type="checkbox" checked="checked" value="forever" /> Remember me</label></div>
<div class="right">Not a member? Register | Lost your password?</div>
</div>
<div class="loginClose">Fermer panneau</div>
</div>
<% } else {%>
<h3>Déconnexion<br></h3>
<h3> Bonjour: <%= session.getAttribute("login")%></h3>
<%}%>
and there is my servlet:
#Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String login = request.getParameter("login")
HttpSession session = request.getSession();
session.setAttribute("login", login);
System.out.println(session.getAttribute("login")); getServletConfig().getServletContext().getRequestDispatcher("/recommandation.jsp").forward(request, response);
}
when i click on login butto, i have an error.
INFO: appachito ATTENTION: ApplicationDispatcher[/RecommandationDefault] PWC1231: Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at org.apache.jsp.recommandation_jsp._jspService(recommandation_jsp.java from :300) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:406) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:483) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:373) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523) at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:822) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:517) at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:488) at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:379) at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:336) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:314) at package1.connexion.doPost(connexion.java:47) at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57) at com.sun.grizzly.ContextTask.run(ContextTask.java:69) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309) at java.lang.Thread.run(Thread.java:619)
ATTENTION: StandardWrapperValve[connexion]: PWC1406: Servlet.service() for servlet connexion threw exception java.lang.NullPointerException at org.apache.jsp.recommandation_jsp._jspService(recommandation_jsp.java from :300) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:406) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:483) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:373) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523) at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:822) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:517) at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:488) at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:379) at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:336) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:314) at package1.connexion.doPost(connexion.java:47) at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57) at com.sun.grizzly.ContextTask.run(ContextTask.java:69) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309) at java.lang.Thread.run(Thread.java:619)
thanks in advance

In Tomcat a .java and .class file will be created for every jsp files with in the application and the same can be found from the path below, Apache-Tomcat\work\Catalina\localhost\'ApplicationName'\org\apache\jsp\index_jsp.java
In your case the jsp name is recommandation.jsp so the path should be something like below Apache-Tomcat\work\Catalina\localhost\'ApplicationName'\org\apache\jsp\recommandation_jsp.java in line no 300 you are trying to access a null object which results in null pointer exception.
If you are using Glassfish, you can find your compiled jsp files here your-domain-dir/generated/jsp/j2ee-modules\\YourModule/org/apache/jsp.
on my system, it is C:\glassfish-4.0\glassfish\domains\domain1\generated\jsp\WebApplication1\org\apache\jsp

jsp tag file: how to access different types of collections of a session attribute?

I have a jsp to which a servlet passes an object (a collection). the object becomes a session attribute:
session.setAttribute("groupList", request.getAttribute("groups"));
I use a tag to recursively generate a menu from the content of this collection:
<c:forEach items="${groupList}" var="emp" begin="0" end="10">
<tag:menuRenderer groupList="${groupList}" />
</c:forEach>
Those items in the are objects of a class Group. This class contains a list of subgroups subGroups and a list of objects of a different class called students.
My problem is that I can not access this list of students in my tag.
This is the tag code:
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%# taglib tagdir="/WEB-INF/tags" prefix="tag"%>
<%# taglib uri='http://java.sun.com/jsp/jstl/functions' prefix='fn' %>
<%# attribute name="groupList" type="java.util.Collection"%>
<c:forEach var="item" items="${groupList}">
<li><c:out value="${item.name}" /></li>
<br>
<!-- ##### here #### -->
<li><c:out value="${fn:length(item.students)}" /> <!-- #### doesn't work ####-->
<li><c:out value="${fn:length(item.subGroups)}" /> <!-- #### works #### -->
<ul>
<tag:menuRenderer groupList="${item.subGroups}" />
</ul>
</c:forEach>
The call to item.students causes an exception, but I can't see what exactly it is because the strack trace only shows where the exception is thrown in the jsp:
SEVERE: Servlet.service() for servlet jsp threw exception
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186)
at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:137)
at org.hibernate.collection.internal.PersistentSet.size(PersistentSet.java:156)
at org.apache.taglibs.standard.functions.Functions.length(Functions.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstFunction.getValue(AstFunction.java:112)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:986)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_c_005fout_005f1(webmenuRenderer_tag.java:202)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_c_005fforEach_005f0(webmenuRenderer_tag.java:143)
at org.apache.jsp.tag.webmenuRenderer_tag.doTag(webmenuRenderer_tag.java:97)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_tag_005fmenuRenderer_005f0(webmenuRenderer_tag.java:240)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_c_005fforEach_005f0(webmenuRenderer_tag.java:153)
at org.apache.jsp.tag.webmenuRenderer_tag.doTag(webmenuRenderer_tag.java:97)
at org.apache.jsp.testMenu2_jsp._jspx_meth_tag_005fmenuRenderer_005f0(testMenu2_jsp.java:173)
at org.apache.jsp.testMenu2_jsp._jspx_meth_c_005fforEach_005f0(testMenu2_jsp.java:138)
at org.apache.jsp.testMenu2_jsp._jspService(testMenu2_jsp.java:90)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at myPackage.controller.ControllerServlet.doGet(ControllerServlet.java:38)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Nov 29, 2012 5:50:36 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Hello] in context with path [/HibernateTest] threw exception [An exception occurred processing JSP page /testMenu2.jsp at line 19
16:
17: <ul>
18: <c:forEach items="${treeMap}" var="emp" begin="0" end="10">
19: <tag:menuRenderer treeMap="${treeMap}" />
20: </c:forEach>
21: </ul>
22:
Stacktrace:] with root cause
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186)
at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:137)
at org.hibernate.collection.internal.PersistentSet.size(PersistentSet.java:156)
at org.apache.taglibs.standard.functions.Functions.length(Functions.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstFunction.getValue(AstFunction.java:112)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:986)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_c_005fout_005f1(webmenuRenderer_tag.java:202)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_c_005fforEach_005f0(webmenuRenderer_tag.java:143)
at org.apache.jsp.tag.webmenuRenderer_tag.doTag(webmenuRenderer_tag.java:97)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_tag_005fmenuRenderer_005f0(webmenuRenderer_tag.java:240)
at org.apache.jsp.tag.webmenuRenderer_tag._jspx_meth_c_005fforEach_005f0(webmenuRenderer_tag.java:153)
at org.apache.jsp.tag.webmenuRenderer_tag.doTag(webmenuRenderer_tag.java:97)
at org.apache.jsp.testMenu2_jsp._jspx_meth_tag_005fmenuRenderer_005f0(testMenu2_jsp.java:173)
at org.apache.jsp.testMenu2_jsp._jspx_meth_c_005fforEach_005f0(testMenu2_jsp.java:138)
at org.apache.jsp.testMenu2_jsp._jspService(testMenu2_jsp.java:90)
// and so on
I'd be very happy if somebody could tell me why this doesn't work!
Do I have to import something?
Thanks in advance! :)

The students collection probably comes from a lazy one-to-many relationship and you're trying to access it in the web tier in which no Hibernate session is active. You should declare the relationship as EAGER in order to have the collection loaded at query time.

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