Spring MVC - HttpMediaTypeNotAcceptableException

Question

I keep getting this HttpMediaTypeNotAcceptableException error for AJAX requests when using with Spring MVC and JSON.. full stack trace of the error is..

 org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.writeWithMessageConverters(AnnotationMethodHandlerAdapter.java:1032)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.handleResponseBody(AnnotationMethodHandlerAdapter.java:972)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.getModelAndView(AnnotationMethodHandlerAdapter.java:921)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:438)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:863)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:851)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:756)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

little googling I did shows that the request should contain something like "accept: application/json" which is does have.. here is the request headers from firebug..

Response Headers
Server  Apache-Coyote/1.1
Content-Type    text/html;charset=utf-8
Content-Length  2503
Date    Thu, 25 Aug 2011 21:00:05 GMT
Connection  close

Request Headers
Host    localhost:8080
User-Agent  Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.20) Gecko/20110803 Firefox/3.6.20 (.NET CLR 3.5.30729)
Accept  application/json, text/javascript, */*; q=0.01
Accept-Language en-us,en;q=0.5
Accept-Encoding gzip,deflate
Accept-Charset  ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive  115
Connection  keep-alive
X-Requested-With    XMLHttpRequest
Referer http://localhost:8080/legaldirectory/index.html
Cookie  JSESSIONID=5C97DA19AED4D5FA17F4A58470FAA93B

Now I am completely lost at what is happening here.. what else can go wrong here to get thi error...

Answer 1

Make sure you add both Jackson jars to classpath:

• jackson-core-asl-x.jar
• jackson-mapper-asl-x.jar

Also, you must have the following in your Spring xml file:

<mvc:annotation-driven />

Answer 2

Because this is the first google hit for "HttpMediaTypeNotAcceptableException" I like to add another problem that I've stumbled upon which resulted in HttpMediaTypeNotAcceptableException too.

In my case it was a controller that specified "produces", e.g.:

@RequestMapping(path = "/mypath/{filename}", method = RequestMethod.GET,
        produces = { MediaType.APPLICATION_XML_VALUE }

because I wanted to serve an XML file. At the same time I'm using a class with "@ControllerAdvice" to catch Exceptions, e.g. if the requested file wasn't found. The Exception handler was returning JSON so the client (angular) app could display the error message somewhere in the SPA.

Now the controller wanted to return XML but the Exception Handler was returning JSON so the HttpMediaTypeNotAcceptableException was raised. I solved this by adding JSON as possible "produces" value:

produces = { MediaType.APPLICATION_XML_VALUE, MediaType.APPLICATION_JSON_VALUE}

Hope this helps somebody else. :-)

Answer 3

response.setHeader("Accept",  "application/json");

Answer 4

Just something important to keep in mind: Spring versions prior to 3.1.2 are compatible with JACKSON 1.x and NOT with JACKSON 2.x. This is because going from JACKSON 1.x to 2.x the classes's package names were changed. In JACKSON 1.x classes are under org.codehaus.jackson while in JACKSON 2.x they are under com.fasterxml.jackson.

To address this issue, starting with Spring 3.1.2 they added a new MappingJackson2HttpMessageConverter to replace MappingJacksonHttpMessageConverter.

You could find more details regarding compatibility issues in this link: Jackson annotations being ignored in Spring

Answer 5

in my case favorPathExtension(false) helped me

@Configuration
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {

@Override
public void configurePathMatch(PathMatchConfigurer configurer) {
    configurer
            .setUseSuffixPatternMatch(false);  // to use special character in path variables, for example, `[e-mail]`
}

@Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
    configurer
            .favorPathExtension(false); // to  avoid HttpMediaTypeNotAcceptableException on standalone tomcat
}

}

Answer 6

Try to add "jackson-databind" jars to pom.xml

`<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>${jackson.databind-version}</version>
</dependency>`

And produces ={MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE} to @RequestMapping

Es. @RequestMapping(value = "/api/xxx/{akey}/{md5}", produces ={MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE} @RequestMapping(value = "/api/contrassegno/{akey}/{md5}", produces ={MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE},...