No mapping found for HTTP request with URI j_spring_security_check in DispatcherServlet

Here's my spring security Bean ``` <beans:beans xmlns="http://www.springframework.org/schema/security" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd"> <http auto-config="true"> <intercept-url pattern="/welcome*" access="ROLE_USER" /> <form-login login-page="/login" default-target-url="/welcome" authentication-failure-url="/loginfailed" /> <logout logout-success-url="/logout" /> </http> <authentication-manager> <authentication-provider> <user-service> <user name="username" password="123456" authorities="ROLE_USER" /> </user-service> </authentication-provider> </authentication-manager> </beans:beans> ``` here's my MVC-dispatcher servlet ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd"> <mvc:annotation-driven /> <tx:annotation-driven /> <context:annotation-config /> <context:component-scan base-package="com.apsas" /> <!-- Required for body marshalling --> <mvc:resources mapping="resources/**" location="/WEB-INF/resources/" /> <bean id="entityManager" class="org.springframework.orm.jpa.support.SharedEntityManagerBean"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> <property name="persistenceUnitName" value="apsaspu" /> </bean> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass"> <value> org.springframework.web.servlet.view.tiles2.TilesView </value> </property> </bean> <bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"> <property name="definitions"> <list> <value>/WEB-INF/tiles.xml</value> </list> </property> </bean> </beans> ``` here's my web.xml ``` <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>Spring MVC Application</display-name> <servlet> <servlet-name>mvc-dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvc-dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/mvc-dispatcher-servlet.xml, /WEB-INF/spring-security.xml</param-value> </context-param> <!-- Spring Security --> <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> ``` and here's my controller ``` @Controller @RequestMapping(value = "/c") public class MainController { @RequestMapping(value = "/welcome", method = RequestMethod.GET) public String printWelcome(ModelMap model, Principal principal) { String name = principal.getName(); model.addAttribute("username", name); model.addAttribute("message", "Spring Security Custom Form example"); return "hello"; } @RequestMapping(value = "/login", method = RequestMethod.GET) public String login(ModelMap model) { return "login"; } @RequestMapping(value = "/loginfailed", method = RequestMethod.GET) public String loginerror(ModelMap model) { model.addAttribute("error", "true"); return "login"; } @RequestMapping(value = "/logout", method = RequestMethod.GET) public String logout(ModelMap model) { return "login"; } } ``` My problem is when im accessing the localhost:8080/apsas/c/welcome Im getting ``` HTTP ERROR 500 Server Error java.lang.NullPointerException at com.apsas.controller.MainController.printWelcome(MainController.java:30) ``` i can successfully go to login page but after clicking the submit button im getting, im getting http error 404 Problem accessing /apsas/c/j_spring_security_check. and here's the log WARNING: No mapping found for HTTP request with URI [/apsas/c/j_spring_security_check] in DispatcherServlet with name 'mvc-dispatcher' i can successfuly accessed some page defined in my tiles except the welcome which should direct me to log in. please help