java - Jetty - 9 BAD REQUEST ERROR with Volley server -

i have upgraded dropwizard 0.8 uses jetty -9 server. using volley server 1.0.15 send json request app. problem when send json volley api throws 400 while when send same request postman working fine.

warn [2015-05-08 14:16:18,223] org.eclipse.jetty.http.httpparser: illegal character 0x16 in state=start buffer heapbytebuffer@642bbd0f[p=1,l=78,c=8192,r=77]={\x16<<<\x03\x00\x00i\x01\x00\x00e\x03\x00\xbfe\x8e\x82\xcb\xe3\xca...\x07\xc0\x11\x00/\x005\x00\x05\x00\xffv\x00\x01\x00>>>-1\r\ncontent-lengt...\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00} warn [2015-05-08 14:16:18,223] org.eclipse.jetty.http.httpparser: badmessage: 400 illegal character 0x16 httpchanneloverhttp@650d154b{r=0,c=false,a=idle,uri=-}

and code make volley request

jsonobject userdetails = new jsonobject(); userdetails.put("email", "tasneem"); userdetails.put("password", "1234"); userdetails.put("deviceid", "243243"); userdetails.put("version", "4.4.4"); userdetails.put("platform", "android"); jsonobjectrequest loginrequest = new jsonobjectrequest(request.method.post,     constants.url_login, userdetails, new response.listener<jsonobject>() {   @override   public void onresponse(jsonobject jsonobject) {    } }, new response.errorlistener() {   @override   public void onerrorresponse(volleyerror volleyerror) {     log.e(tag, volleyerror.tostring());     mlistener.onerror(volleyerror);   } }) {   @override   public map<string, string> getheaders() throws authfailureerror {     map<string, string> headers = new hashmap<string, string>();     headers.put("content-type", "application/json; charset=utf-8");     return headers;   } }; 

really appreciate help. thanks.

and can tell me how trace complete request without creating custom volley request, there way?

i traced packets sent in wireshark , found in header, content-type mentioned twice.

content-type: application/json; charset=utf-8\r\n content-type: application/json; charset=utf-8\r\n user-agent: dalvik/1.6.0 (linux; u; android 4.4.2; htc desire 526gplus dual sim build/kot49h)\r\n . .  . 

removing overriden method getheaders() worked

@override public map<string, string> getheaders() throws authfailureerror { map<string, string> headers = new hashmap<string, string>(); headers.put("content-type", "application/json; charset=utf-8"); return headers; } 

the override not required because in com.android.volley.toolbox.jsonrequest.java, content-type set application/json; charset=utf-8 , seems dropwizard 0.8 not take same header twice.