Spring JSON request getting 406 (not Acceptable)

Question

this is my javascript:

    function getWeather() {         $.getJSON('getTemperature/' + $('.data option:selected').val(), null, function(data) {             alert('Success');                                        });     } 

this is my controller:

@RequestMapping(value="/getTemperature/{id}", headers="Accept=*/*", method = RequestMethod.GET) @ResponseBody public Weather getTemparature(@PathVariable("id") Integer id){     Weather weather = weatherService.getCurrentWeather(id);         return weather; } 

spring-servlet.xml

<context:annotation-config /> <tx:annotation-driven /> 

Getting this error:

GET http://localhost:8080/web/getTemperature/2 406 (Not Acceptable) 

Headers:

Response Headers

Server  Apache-Coyote/1.1 Content-Type    text/html;charset=utf-8 Content-Length  1070 Date    Sun, 18 Sep 2011 17:00:35 GMT 

Request Headers

Host    localhost:8080 User-Agent  Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0.2) Gecko/20100101 Firefox/6.0.2 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 Connection  keep-alive X-Requested-With    XMLHttpRequest Referer http://localhost:8080/web/weather Cookie  JSESSIONID=7D27FAC18050ED84B58DAFB0A51CB7E4 

Interesting note:

I get 406 error, but the hibernate query works meanwhile. This is what tomcat log says, everytime when I change selection in dropbox:

 select weather0_.ID as ID0_0_, weather0_.CITY_ID as CITY2_0_0_, weather0_.DATE as DATE0_0_, weather0_.TEMP as TEMP0_0_ from WEATHER weather0_ where weather0_.ID=? 

What could the problem be? There were two similar questions in SO before, I tried all the accepted hints there, but they did not work I guess...

Any suggestions? Feel free to ask questions...

Answer 1

406 Not Acceptable

The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request.

So, your request accept header is application/json and your controller is not able to return that. This happens when the correct HTTPMessageConverter can not be found to satisfy the @ResponseBody annotated return value. HTTPMessageConverter are automatically registered when you use the <mvc:annotation-driven>, given certain 3-d party libraries in the classpath.

Either you don't have the correct Jackson library in your classpath, or you haven't used the <mvc:annotation-driven> directive.

I successfully replicated your scenario and it worked fine using these two libraries and no headers="Accept=*/*" directive.

• jackson-core-asl-1.7.4.jar
• jackson-mapper-asl-1.7.4.jar