Could not initialize class org.springframework.web.context.request.ServletRequestAttributes - mongodb

Question

I'm trying to create a Rest controller using Spring 4. I'm also using mongodb as a database, and Tomcat 7 as webserver.
I'm getting this error message when i try to submit any Rest request:
type Exception report
message Servlet execution threw an exception
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet execution threw an exception
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.lang.NoClassDefFoundError: Could not initialize class org.springframework.web.context.request.ServletRequestAttributes
org.springframework.web.servlet.FrameworkServlet.buildRequestAttributes(FrameworkServlet.java:996)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:923)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:822)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
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/7.0.56 logs.
I'm using those version in my pom.xml
<!-- Web -->
<jsp.version>2.2</jsp.version>
<jstl.version>1.2</jstl.version>
<servlet.version>2.5</servlet.version>
<!-- Spring -->
<spring-framework.version>4.0.0.RELEASE</spring-framework.version>
<!-- spring-web -->
<spring-web.version>4.1.2.RELEASE</spring-web.version>
<!-- Spring data for MongoDB -->
<springframework.data-version>1.6.1.RELEASE</springframework.data-version>
here is the controller class that'm using :
#RestController
#RequestMapping("/rest/user")
public class UserContoller {
#Autowired
UserServices userServices;
#RequestMapping(value = "/{username}", method = RequestMethod.GET)
public #ResponseBody User findUserByUsername(#PathVariable ("username") String username){
return userServices.findUserByUsername(username);
}
}
would you please help me?
thank you in advance

Answer 1

I fixed it this way:
#RequestMapping(value = "/user", method = RequestMethod.GET, produces = "application/json")
#ResponseBody
public User findUsername(#RequestParam("username") String username) {
logger.info("Searcing for user using his username");
return userServices.findUserByUsername(username);
}

Answer 2

I had a similar issue and I believe a combination of things resolved this issue:
Make sure that you have the following two lines in your servlet.xml and in this order(meaning annotation-driven must be listed before the default-servlet-handler)
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
*Any equivalent viewResolver bean is fine.
Make sure this is in your web.xml:
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
I see you dont mention what you're GET will produce. For Ex: I have this attribute in my #RequestMapping produces = MediaType.APPLICATION_JSON_VALUE
Finally, I'm not sure why but each time I add a new controller mapping, I need to run the Maven Install lifecycle or it doesn't see the new mapping. This issue i'm still trying to figure out.