java获取io。grpc。Firebase Firestore的状态异常

Question

我经常从Firestore收到这个运行时异常。下面我附上了stacktrace。我正在使用：

com.google.firebase:firebase-firestore:17.0.1

 Caused by io.grpc.StatusException: DEADLINE_EXCEEDED: The datastore operation timed out, or the data was temporarily unavailable. 
at io.grpc.Status.asException(SourceFile:534) 
at com.google.firebase.firestore.g.zzs.zza(SourceFile:98) 
at com.google.firebase.firestore.b.zzd.zza(SourceFile:122)
at com.google.firebase.firestore.b.zzab.zza(SourceFile:321) 
at com.google.firebase.firestore.b.zzf.zza(SourceFile:236) 
at com.google.firebase.firestore.f.zzo.zza(SourceFile:6527) 
at com.google.firebase.firestore.f.zzv.zzb(SourceFile:2089) 
at com.google.firebase.firestore.f.zza$zzb.zza(SourceFile:73)
at com.google.firebase.firestore.g.zzm$1.onMessage(SourceFile:77) 
at io.grpc.ForwardingClientCallListener.onMessage(SourceFile:36) 
at io.grpc.ForwardingClientCallListener.onMessage(SourceFile:36) 
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1MessagesAvailable.runInContext(SourceFile:498)
at io.grpc.internal.ContextRunnable.run(SourceFile:37) 
at io.grpc.internal.SerializingExecutor.run(SourceFile:123) 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422) at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152) 
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
at com.google.firebase.firestore.g.zza$zza.run(SourceFile:190) at java.lang.Thread.run(Thread.java:818)

我不确定，但我想我在调用任务时遇到了这个异常。getResult（）在firestore的onComplete回调中。Collection（）方法