java - 500 Internal server when trying to upload image to server -

i working on application allows user upload image server. getting 500 internal server error .i cant seem find related error solve problem. code follows:

class retreivefeedtask extends asynctask<string, void, string> {     protected string doinbackground(string... url){         try {             bytearrayoutputstream bos = new bytearrayoutputstream();             bitmapdrawable drawable = (bitmapdrawable) imageview.getdrawable();             bitmap bitmap = drawable.getbitmap();             bitmap.compress(compressformat.jpeg, 50, bos);             byte[] data = bos.tobytearray();              httpclient httpclient = new defaulthttpclient();             httppost postrequest = new httppost("http://10.155.103.167:9090/restserver/rest/todos");             string filename = string.format("file_%d.jpg", new date().gettime());             bytearraybody bab = new bytearraybody(data, filename);             contentbody mimepart = bab;              // file file= new file("/mnt/sdcard/forest.png");             // filebody bin = new filebody(file);              multipartentity reqentity = new multipartentity(httpmultipartmode.browser_compatible);              reqentity.addpart("file", bab);             postrequest.setentity(reqentity);             postrequest.setheader("content-type", "application/json");             int timeoutconnection = 60000;              httpparams httpparameters = new basichttpparams();             httpconnectionparams.setconnectiontimeout(httpparameters, timeoutconnection);             int timeoutsocket = 60000;             httpconnectionparams.setsotimeout(httpparameters, timeoutsocket);             httpconnectionparams.settcpnodelay(httpparameters, true);             httpresponse response = httpclient.execute(postrequest);             bufferedreader reader = new bufferedreader(new inputstreamreader(             response.getentity().getcontent(), "utf-8"));             string sresponse;             stringbuilder s = new stringbuilder();             system.out.println("response: " + response.getstatusline());              while ((sresponse = reader.readline()) != null) {                 s = s.append(sresponse);             }              txt.settext("new text"+s);         } catch (exception e) {             // handle exception here             e.printstacktrace();             system.out.println(e.tostring());         }         return null;     } } 

use code upload images it's working fine me

public class uploadtoserver extends asynctask<string, string, string>{     @override     protected void onpreexecute() {         super.onpreexecute();     }      @override     protected string doinbackground(string... args){         string status="";         string url = "";        try{              log.d("image path ======",takepicture.file.tostring());             httpclient httpclient = new defaulthttpclient();             httppost httppost = new httppost(url);             file file = new file(takepicture.file.tostring());             filebody bin = new filebody(file);             multipartentity reqentity = new multipartentity();             reqentity.addpart("content-disposition", new stringbody("form-data"));             reqentity.addpart("name", new stringbody("test"));             reqentity.addpart("filename", bin);             reqentity.addpart("content-type", new stringbody("image/jpg"));             httppost.setentity(reqentity);             log.d("executing request ",  httppost.getrequestline().tostring());             httpresponse response = httpclient.execute(httppost);             httpentity resentity = response.getentity();             if (resentity != null) {                 log.d("response content length: ",resentity.getcontentlength()+"");                 if(resentity.getcontentlength()>0) {                     status= entityutils.tostring(resentity);                 } else {                     status= "no response server";                     log.d("status----->",status);                 }             } else {                 status = "no response server";                 log.d("status----->",status);             }         } catch (exception e) {                 e.printstacktrace();                 status = "unable connect server";          }             return status;       }      @override     protected void onpostexecute(string status) {          super.onpostexecute(status);      } }