Why does it send twice?!?!

package net.mc21.attendancecheck;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpClient {
    public enum RequestType{
        GET,
        POST
    }

    public static void send(byte[] sentInfo, String to, RequestType requestType) throws IOException {
        URL url;
        HttpURLConnection connection = null;

        //Create connection
        url = new URL(to);
        connection = (HttpURLConnection)url.openConnection();
        connection.setChunkedStreamingMode(0);
        connection.setConnectTimeout(100000);
        connection.setRequestMethod(requestType.toString());
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setRequestProperty("Content-Length", "" +
                Integer.toString(sentInfo.length));
        connection.setRequestProperty("Content-Language", "en-US");

        connection.setUseCaches (false);
        connection.setDoInput(true);
        connection.setDoOutput(true);

        // Send POST output.
        DataOutputStream printout = new DataOutputStream(connection.getOutputStream());
        printout.write(sentInfo);
        printout.flush();
        printout.close();

        //Get Response
        InputStream is = connection.getInputStream();
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));
        String line;
        StringBuffer response = new StringBuffer();

        while((line = rd.readLine()) != null) {
            response.append(line);
            response.append('\r');
        }

        rd.close();
    }
}