When i notify multiple phones(I use C2DM), I receive messages only on one. One normal and one empty

I receive messages only on one phone. One normal message with my informaion and one empty message which crash my application. I change the registration id key and the autorization key, you will see.

public class URLCaller {

private static final String PASSWORD = "xxxxxxx"; //i remove it

private static final String EMAIL = "xxxxxxxxxx@gmail.com"; //i remove it

public static final String PARAM_REGISTRATION_ID = "registration_id";

public static final String PARAM_DELAY_WHILE_IDLE = "delay_while_idle";

public static final String PARAM_COLLAPSE_KEY = "collapse_key";

static String auth_key = null;

static byte[] postData = null;

public static void callGoogle(CalEvent calEvent) throws IOException, SystemException {

URL url = new URL("https://android.clients.google.com/c2dm/send");

StringBuilder builder = new StringBuilder();

HttpsURLConnection conn = null;
// For each smartPhone
for(SmartPhone smartPhone : SmartPhoneLocalServiceUtil.getSmartPhones(0, SmartPhoneLocalServiceUtil.getSmartPhonesCount())) {
auth_key = getAuthorization();
//Setup data
System.out.println("" + smartPhone.getRegistrationId());
builder.append("registration_id=" + smartPhone.getRegistrationId());

builder.append("&").append(PARAM_COLLAPSE_KEY).append("=").append("0");
builder.append("&").append("data.payload").append("=").append(URLEncoder.encode("calEventId=" + calEvent.getCalEventId(), "UTF-8"));
postData = builder.toString().getBytes("UTF-8");

//Calling server
conn = (HttpsURLConnection) url.openConnection();
conn.setHostnameVerifier(new CustomizedHostnameVerifier());
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
conn.setRequestProperty("Content_Lenght", Integer.toString(postData.length));
conn.setRequestProperty("Authorization", "GoogleLogin auth=" + auth_key);

// Issue the HTTP POST request
OutputStream out = conn.getOutputStream();
out.write(postData);
out.close();

System.out.println("Google server said: " + conn.getResponseCode() + ", " + conn.getResponseMessage());

// Check for updated token header
String updatedAuthToken = conn.getHeaderField("Update-Client-Auth");
if(updatedAuthToken != null && !auth_key.equals(updatedAuthToken)) {

System.out.println("C2DM," + "Got updated auth token from datamessaging servers: " + updatedAuthToken);

//auth_key = updatedAuthToken;

String responseLine = new BufferedReader(new InputStreamReader(conn.getInputStream())).readLine();

// NOTE: You *MUST* use exponential backoff if you receive a 503 response code.
// Since App Engine's task queue mechanism automatically does this for tasks that
// return non-success error codes, this is not explicitly implemented here.
// If we weren't using App Engine, we'd need to manually implement this.
if(responseLine == null || responseLine.equals("")) {
System.out.println("Got " + conn.getResponseCode() + " response from Google AC2DM endpoint.");
throw new IOException("Got empty response from Google AC2DM endpoint.");
}

String[] responseParts = responseLine.split("=", 2);
if(responseParts.length != 2) {
System.out.println("Invalid message from google: " + conn.getResponseCode() + " " + responseLine);
throw new IOException("Invalid response from Google " + conn.getResponseCode() + " " + responseLine);
}

if(responseParts[0].equals("id")) {
System.out.println("Successfully sent data message to device: " + responseLine);
}

if(responseParts[0].equals("Error")) {
String err = responseParts[1];
System.out.println("Got error response from Google datamessaging endpoint: " + err);
// No retry.
//throw new IOException(err);
}
}

}

}

public static String getAuthorization() {
String authToken = null;

HttpURLConnection urlConnection;
URL url;
try {
url = new URL("https://www.google.com/accounts/ClientLogin");

urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.setUseCaches(false);
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

StringBuilder builder = new StringBuilder();
builder.append("Email=").append(EMAIL);
builder.append("&Passwd=").append(PASSWORD);
builder.append("&accountType=GOOGLE");
builder.append("&source=Google-C2DM-Example");
builder.append("&service=ac2dm");

OutputStream outputStream = urlConnection.getOutputStream();
outputStream.write(builder.toString().getBytes("UTF-8"));
outputStream.close();
int responseCode = urlConnection.getResponseCode();
System.out.println(responseCode + "\tSuccess");
StringBuffer resp = new StringBuffer();
if(responseCode == HttpURLConnection.HTTP_OK) {
InputStream inputStream = urlConnection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = rd.readLine()) != null) {
if(line.startsWith("Auth=")) {
resp.append(line.substring(5));
}
}
rd.close();
}

authToken = resp.toString();
System.out.println("AuthTOken" + authToken);
} catch(MalformedURLException e) {
e.printStackTrace();
} catch(ProtocolException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
return authToken;

}

private static class CustomizedHostnameVerifier implements HostnameVerifier {

@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
}

I do not get any errors. Thank You, good day.

— modified on Oct 24, 2011, 10:56:22 AM