Pushsharp 4.0.10 "Connection Error" for IOS device tokens - ios

Question

I developed windows service for sending push notifications to both iOS and Android apps using pushsharp library. Recently I updated the library from 2.x.x to 4.0.10 and GCM notifications are sending fine but Ios notifications are not sending, always getting "Connection Error" And I need to send notifications to thousands of tokens, So I am looping through all the tokens and queuing. Even for 10 tokens also getting same error.
Please suggest me what's wrong with my code. Here is my code snippet
public static void SendNotifications(List currentBrandNotications, long brandId)
{
byte[] appleCert = null;
string p12File = #"aps_production_brand" + brandId.ToString().Trim() + ".p12";
try
{
appleCert = File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "P12\\" + p12File));
}
catch (Exception ex)
{
logger.Debug("P12 certificate is not avilable for BrandId: " + brandId);
}
try
{
logger.Debug(" Send PushNotifications To Apple :- ");
if (appleCert != null)
{
// Configuration
var config = new ApnsConfiguration(ApnsConfiguration.ApnsServerEnvironment.Production, appleCert, currentBrandNotications[0].P12Password);
// Create a new broker
var apnsBroker = new ApnsServiceBroker(config);
var fbs = new FeedbackService(config);
// Wire up events
apnsBroker.OnNotificationFailed += (Notification, aggregateEx) =>
{
//ScheduledNotification ScheduledNotification = new InstantPNScheduler.ScheduledNotification();
aggregateEx.Handle(ex =>
{
// See what kind of exception it was to further diagnose
if (ex is ApnsNotificationException)
{
var notificationException = (ApnsNotificationException)ex;
// Deal with the failed notification
var apnsNotification = notificationException.Notification;
var statusCode = notificationException.ErrorStatusCode;
logger.Debug("Apple Notification Failed: ID=" + apnsNotification.Identifier + " Code=" + statusCode);
}
else
{
// Inner exception might hold more useful information like an ApnsConnectionException
logger.Debug(ex.InnerException.ToString());
}
// Mark it as handled
return true;
});
};
apnsBroker.OnNotificationSucceeded += (Notification) =>
{
logger.Debug("Apple Notification Sent!");
};
// Start the broker
apnsBroker.Start();
foreach (ScheduledNotification notification in currentBrandNotications)
{
try
{
//logger.Debug("iOS Device token=" + notification.DeviceToken); apnsBroker.QueueNotification(new ApnsNotification
{
DeviceToken = notification.DeviceToken,
Payload = JObject.Parse("{\"aps\":{\"alert\":\"" + notification.Message + "\",\"badge\":1,\"sound\":\"sound.caf\",\"BrandId\":\"" + brandId.ToString() + "\",\"notificationType\":\"Basic\",\"DeviceType\":\"" + notification.DeviceType + "\",\"DeviceToken\":\"" + notification.DeviceToken + "\",\"NotificationId\":\"" + notification.NotificationId + "\"}}")
});
}
Thread.Sleep(800);
}
catch (Exception ex)
{
logger.Debug(" SendPushNotificationToApple :- " + ex.Message);
}
}
// Stop the broker, wait for it to finish
// This isn't done after every message, but after you're
// done with the broker
apnsBroker.Stop();
}
}
catch (Exception ex)
{
logger.Debug("Error" + ex.Message);
}
finally
{
//apnsBroker = null;
}
}
Note : If I put thread.sleep(800) in for loop, then notifications will be sent but it's getting too late in case of thousands of tokens. I need it without thread.sleep(800), even If I reduce below 800ms, getting same exception.
Please help me what's wrong with my code.
Any help would be appreciated.