Problem with Tomcat - “The application was deployed in the context path [/ SchoolMaven], but did not start”

What could be such a mistake

OK - Неразвернутое приложение в контексте пути [/SchoolMaven] Развертывание на месте на C:\Users\Fallen\Documents\NetBeansProjects\SchoolMaven\target\SchoolMaven Выполняется развертывание... deploy?config=file%3A%2FC%3A%2FUsers%2FFallen%2FAppData%2FLocal%2FTemp%2Fcontext3285273547592175075.xml&path=/SchoolMaven ОШИБКА - Приложение было развёрнуто в контекстном пути [/SchoolMaven], но не стартовало 

Here are the codes

Controller

 package adil.java.schoolmaven.controller; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.List; import javax.servlet.http.HttpServletResponse; import adil.java.schoolmaven.entity.Student; import adil.java.schoolmaven.service.StudentService; import org.apache.commons.io.IOUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.MediaType; import org.springframework.stereotype.Controller; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView; @Controller public class StudentController { private final static File UPLOAD_FOLDER = new File(System.getProperty("user.dir") + "/avatars/"); static { if (!UPLOAD_FOLDER.exists()) { UPLOAD_FOLDER.mkdirs(); } } // Constructor based Dependency Injection private StudentService studentService; public StudentController() { } @Autowired public StudentController(StudentService studentService) { this.studentService = studentService; } @RequestMapping(value = {"/", "/index"}, method = RequestMethod.GET) public ModelAndView hello(HttpServletResponse response) { ModelAndView mv = new ModelAndView(); mv.setViewName("index"); return mv; } // Get All Users @RequestMapping(value = "/allStudents", method = {RequestMethod.GET, RequestMethod.POST}) public ModelAndView displayAllUser() { System.out.println("User Page Requested : All Students"); ModelAndView mv = new ModelAndView(); List<Student> studentList = studentService.getAllStudents(); mv.addObject("studentList", studentList); mv.setViewName("allStudents"); return mv; } @RequestMapping(value = "/addStudent", method = RequestMethod.GET) public ModelAndView displayNewUserForm() { ModelAndView mv = new ModelAndView("addStudent"); mv.addObject("headerMessage", "Add Student Details"); mv.addObject("student", new Student()); return mv; } @PostMapping(value = "/addStudent") public String saveNewStudent(@RequestParam("name") String name, @RequestParam("surname") String surname, @RequestParam("avatar") MultipartFile file) throws IOException { if (file != null && !file.isEmpty()) { Student student = new Student(); student.setSurname(surname); student.setSurname(name); student.setAvatar(file.getBytes()); studentService.saveStudent(student); } return "redirect:/allStudents"; } @RequestMapping(value = "/image", method = RequestMethod.GET) public void image(@RequestParam String url, HttpServletResponse response) throws IOException { InputStream in = new FileInputStream(url); response.setContentType(MediaType.IMAGE_JPEG_VALUE); IOUtils.copy(in, response.getOutputStream()); } @RequestMapping(value = "/editStudent/{id}", method = RequestMethod.GET) public ModelAndView displayEditUserForm(@PathVariable Long id) { ModelAndView mv = new ModelAndView("/editStudent"); Student student = studentService.getStudentById(id); mv.addObject("headerMessage", "Редактирование студента"); mv.addObject("student", student); return mv; } @RequestMapping(value = "/editStudent/{id}", method = RequestMethod.POST) public ModelAndView saveEditedUser(@ModelAttribute Student student, BindingResult result) { ModelAndView mv = new ModelAndView("redirect:/allStudents"); if (result.hasErrors()) { System.out.println(result.toString()); return new ModelAndView("error"); } boolean isSaved = studentService.saveStudent(student); if (!isSaved) { return new ModelAndView("error"); } return mv; } @RequestMapping(value = "/deleteStudent/{id}", method = RequestMethod.GET) public ModelAndView deleteUserById(@PathVariable Long id) { boolean isDeleted = studentService.deleteStudentById(id); System.out.println("Удаление студента: " + isDeleted); ModelAndView mv = new ModelAndView("redirect:/allStudents"); return mv; } } 

Add Student JSP

  <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script> <title>Home</title> </head> <body> <div class="add"> <br> <br> <br> <br> <center> <h1>${headerMessage}</h1> <form:form method="POST" action="/addStudent" enctype="multipart/form-data"> <table> <tr> <td><label path="Name">Имя</label></td> <td><input type="text" name="name"/></td> </tr> <tr> <td><label path="Surname">Фамилия</label></td> <td><input type="text" name="surname"/></td> </tr> <tr> <td><label path="Avatar">Фотография:</label></td> <td> <input type="file" name="avatar"/> </td> </tr> <tr> <td><input class="btn btn-primary" type="submit" value="Добавить"></td> </tr> </table> </form:form> </center> </div> </body> </html> All Student JSP <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" isELIgnored="false"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <!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"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script> <link href="../css/style.css" rel="stylesheet" type="text/css"> <style><%@include file="/WEB-INF/css/style.css"%></style> <title>Все студенты</title> </head> <body> <br> <br> <br> <br> <div class="it"> <h3>Список всех студентов</h3> ${message} <br> <br> <table class="table"> <thead> <tr> <th scope="col">#</th> <th scope="col">Имя</th> <th scope="col">Фамилия</th> <th scope="col">Фото</th> </tr> </thead> <tbody> <c:forEach var="student" items="${studentList}"> <tr> <th scope="row">1</th> <td>${student.name}</td> <td>${student.surname}</td> <td><img src="data:image/jpg;base64,${student.base64Image}" style="max-height: 200px; max-width: 200px;" /></td> <td><a href="${pageContext.request.contextPath}/editStudent/${student.id}"><button type="button" class="btn btn-primary">Редактировать</button> <td><a href="${pageContext.request.contextPath}/deleteStudent/${student.id}"><button type="button" class="btn btn-primary">Удалить</button> </tr> </c:forEach> </tbody> </table> <a href="${pageContext.request.contextPath}/addStudent"><button type="button" class="btn btn-primary">Добавить студента</button></a> </div> </body> </html> 

Error in the log

 29-Apr-2019 15:19:31.820 INFO [mysql-cj-abandoned-connection-cleanup] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1383) at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1036) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:117) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:84) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 29-Apr-2019 15:19:31.820 INFO [mysql-cj-abandoned-connection-cleanup] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1383) at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1036) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:117) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:84) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. 29-Apr-2019 15:19:31.883 INFO [mysql-cj-abandoned-connection-cleanup] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1383) at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1036) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:117) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:84) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)