RestTemplate throws Could not extract response when spring-security is enabled -

resttemplate fails convert pojo json if spring-security enabled.

following error message thrown---> there unexpected error (type=internal server error, status=500). not extract response: no suitable httpmessageconverter found response type [class java.util.arraylist] , content type [text/html;charset=utf-8]

works if spring-security disabled-->// http.authorizerequests().anyrequest().permitall(); please find spring-security snippet.

http.formlogin()             .loginpage("/signin")             .loginprocessingurl("/signin/authenticate")             .failureurl("/signin?param.error=bad_credentials")             .defaultsuccessurl("/howpointsworks")              .and().logout()             .logouturl("/signout")             .deletecookies("jsessionid")              .and()              .authorizerequests()             .antmatchers("/","/favicon.ico")             .permitall()              .antmatchers("/rest/v1/**", "/twitter/**", "/web/**").hasrole("user")             .and()             .apply(new springsocialconfigurer()); 

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restful service invoked spring-mvc controller via resttemplate

@requestmapping(value = "/web/contentfeed", method = requestmethod.get) public modelandview showcontentfeedform(principal principal, httpservletrequest request) {      resttemplate resttemplate = new resttemplate();     resttemplate.setmessageconverters(getmessageconverters());     string url = "http://localhost:9000/rest/v1/socialmedia";      httpheaders headers = new httpheaders();     headers.setaccept(arrays.aslist(mediatype.application_json));     httpentity<string> entity = new httpentity<string>(headers);      responseentity<arraylist> social = resttemplate.getforentity(url,             arraylist.class);     parameterizedtypereference<list<socialmedia>> responsetype = new parameterizedtypereference<list<socialmedia>>() {     };     responseentity<list<socialmedia>> list = resttemplate.exchange(url,             httpmethod.get, entity, responsetype);      }     mv.addobject("list",list);         return mv; }    

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restful endpoint invoked resttemplate

@requestmapping(method = requestmethod.get,produces={"application/json"}) public  responseentity<list<socialmedia>> getallsocialmedia() {     return new responseentity<list<socialmedia>>(socialmediarepository.findall(), null, httpstatus.ok); } 

fails convert socialmedia(pojo)--> json if spring-security enabled. tried setting headers mediatype.all doesnot work.