title: GCM Messages not being received sometime
body: <p>Friend, I am working with a chat application. In my chat application I am using GCM for push notification. GCM is working fine with my application. But not all time I am not able to get GCM message. Sometime I receive GCM message and sometime don't. Why so? I searched for GCM message failure but did not find the right one.</p>
  
  <p>Anyone, can please help me? </p>