เกิด exception sendto failed: EPIPE (Broken pipe) ของ android ครับ

int bytesRead, bytesAvailable, bufferSize;
			byte[] buffer;
			int maxBufferSize = 1 * 1024 * 1024;
			int resCode = 0;
			String resMessage = ""; 
			String lineEnd = "\r\n";
			String twoHyphens = "--";
			String boundary =  "*****";

			
   	     	toast.setGravity(Gravity.CENTER, 0, 0);
   	     	
			try {
				
				/** Check file on SD Card ***/
				File file = new File(imgPath);
				if(!file.exists())
				{
					toast.show();
				}
				
				FileInputStream fileInputStream = new FileInputStream(new File(imgPath));
				
				URL url = new URL("http://shop.surinrobot.com/web_service/test_uploadfile_shop.php");
				HttpURLConnection conn = (HttpURLConnection) url.openConnection();
				conn.setDoInput(true);
				conn.setDoOutput(true);
				conn.setUseCaches(false);
				conn.setRequestMethod("POST");
				
				conn.setRequestProperty("Connection", "Keep-Alive");
				conn.setRequestProperty("Content-Type","multipart/form-data;boundary=" + boundary);
				
				DataOutputStream outputStream = new DataOutputStream(conn.getOutputStream());
				outputStream.writeBytes(twoHyphens + boundary + lineEnd);
				outputStream.writeBytes("Content-Disposition: form-data; name=\"filUpload\";filename=\""+ imgPath + "\"" + lineEnd);
				outputStream.writeBytes(lineEnd);

				bytesAvailable = fileInputStream.available();
				bufferSize = Math.min(bytesAvailable, maxBufferSize);
				buffer = new byte[bufferSize];
				
				// Read file
				bytesRead = fileInputStream.read(buffer, 0, bufferSize);
				 
				while (bytesRead > 0) {
					outputStream.write(buffer, 0, bufferSize);
					bytesAvailable = fileInputStream.available();
					bufferSize = Math.min(bytesAvailable, maxBufferSize);
					bytesRead = fileInputStream.read(buffer, 0, bufferSize);
				}
				
				outputStream.writeBytes(lineEnd);
				outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
				
				// Response Code and  Message
				resCode = conn.getResponseCode(); exception ตรงนี้ 

				if(resCode == HttpURLConnection.HTTP_OK)
				{
					InputStream is = conn.getInputStream();
					ByteArrayOutputStream bos = new ByteArrayOutputStream();
					 
					int read = 0;
						while ((read = is.read()) != -1) {
						bos.write(read);
					}
						
					byte[] result = bos.toByteArray();
					bos.close();
					 
					resMessage = new String(result);
				 
				}
				
				Log.d("resCode=",Integer.toString(resCode));
				Log.d("resMessage=",resMessage.toString());
			 
				fileInputStream.close();
				outputStream.flush();
				outputStream.close();
				
				JSONArray jsonAr = new JSONArray(resMessage.toString());

			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (ClientProtocolException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

			return null;