Hello
Few days ago we have started to experience regular problems sending GCM messages from our servers via
https://android.googleapis.com/gcm/send. At some random time GCM service stops to respond normally and part of requests fail with connection timeout (timeout is set to 2 seconds). This causes significant throughput degradation of sending messages. This degradation lasts for some time (from 5 minutes to few hours), and then GCM service starts to work normally again. We observed this several times:
October 6th, 15:35 - 18:00 (GMT)
October 5th, 15:40
October 4th, 17:20 - 18:45
October 2nd, 15:20 - 19:40
September 30th, 17:15 - 17:25
Graph below show the number of successfully sent GCM messages per 5 minutes on normal day and on day when we experienced connection timeouts.
What can be the reason of connection timeouts and how to deal with it?
Best regards
Dmitry Trunin