Firebase Push - 键google.sent_time预期String但值为java.lang.Long

Question

当我使用GCM Service的Android应用程序收到Firebase推送时，我会收到以下信息：

  

W / Bundle：关键google.sent_time预期String但值为a   java.lang.Long中。返回了默认值<null>。

我知道它们是不同的服务，但应用程序能够接收推送通知，我在网上找不到有关此错误日志的任何信息。

为什么我会收到此java.lang.ClassCastException？

完成Stacktrace

    11-10 10:51:33.536 31712-31712/abcd.com.abcd E/FirebaseInstanceId: Failed to resolve target intent service, skipping classname enforcement
    11-10 10:51:33.536 31712-31712/abcd.com.abcd E/FirebaseInstanceId: Error while delivering the message: ServiceIntent not found.
    11-10 10:51:33.546 31712-32529/abcd.com.abcd W/Bundle: Key google.sent_time expected String but value was a java.lang.Long.  The default value <null> was returned.
    11-10 10:51:33.546 31712-32529/abcd.com.abcd W/Bundle: Attempt to cast generated internal exception:
      java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String
      at android.os.BaseBundle.getString(BaseBundle.java:921)

      at com.google.android.gms.gcm.zza.zzae(Unknown Source)
      at com.google.android.gms.gcm.GcmListenerService.zzo(Unknown Source)   
      at com.google.android.gms.gcm.GcmListenerService.zzn(Unknown Source)   
      at com.google.android.gms.gcm.GcmListenerService.zzm(Unknown Source)
      at com.google.android.gms.gcm.GcmListenerService.zza(Unknown Source)    
      at com.google.android.gms.gcm.GcmListenerService$1.run(Unknown Source)                                              
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
      at java.lang.Thread.run(Thread.java:818)
    11-10 10:51:33.546 31712-32529/abcd.com.abcd D/abcd: GCMBroadcastReceiver - Push received!

Obs：“abcd”正在取代我们的包描述。