尝试在FirebaseDatabase中更新孩子时出错

Question

我正在尝试编写聊天应用程序。但是当我尝试发送消息时，通过从Firebase更新我的RealtimeDatabase中的Children，我收到此错误：

at com.google.android.gms.internal.zh.zzas(Unknown Source)
      at com.google.android.gms.internal.zg.zzao(Unknown Source)
       at com.google.android.gms.internal.zg.zzar(Unknown Source)
       at com.google.android.gms.internal.zh.zzas(Unknown Source)
       at com.google.android.gms.internal.zg.zzao(Unknown Source)
       at com.google.android.gms.internal.zg.zzar(Unknown Source)
       at com.google.android.gms.internal.zh.zzas(Unknown Source)
       at com.google.android.gms.internal.zg.zzao(Unknown Source)
       at com.google.android.gms.internal.zg.zzar(Unknown Source)
       at com.google.android.gms.internal.zh.zzas(Unknown Source)

这个错误会持续几页。 但我不知道为什么会这样。我可以一次写入数据库的数量有限吗？