我如何处理名称解析失败的目标firestore.googleapis.com:443代码。14

Question

我如何以及在哪里处理这个错误，并阻止我的应用程序崩溃？

$ node app.js
Server Started at port 3000
events.js:200
      throw er; // Unhandled 'error' event
      ^

Error: 14 UNAVAILABLE: Name resolution failed for target firestore.googleapis.com:443
    at Object.callErrorFromStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\call.js:30:26)
    at Object.onReceiveStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\client.js:327:49)
    at Object.onReceiveStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\client-interceptors.js:303:181)
    at Http2CallStream.outputStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\call-stream.js:114:27)
    at Http2CallStream.maybeOutputStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\call-stream.js:153:22)
    at Http2CallStream.endCall (D:\food_list\node_modules\@grpc\grpc-js\build\src\call-stream.js:140:18)
    at Http2CallStream.cancelWithStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\call-stream.js:441:14)
    at ChannelImplementation.tryPick (D:\food_list\node_modules\@grpc\grpc-js\build\src\channel.js:214:32)
    at ChannelImplementation._startCallStream (D:\food_list\node_modules\@grpc\grpc-js\build\src\channel.js:244:14)
    at Http2CallStream.start (D:\food_list\node_modules\@grpc\grpc-js\build\src\call-stream.js:418:22)
Emitted 'error' event on ClientReadableStreamImpl instance at:
    at Object.onReceiveStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\client.js:327:28)
    at Object.onReceiveStatus (D:\food_list\node_modules\@grpc\grpc-js\build\src\client-interceptors.js:303:181)
    [... lines matching original stack trace ...]
    at Http2CallStream.start (D:\food_list\node_modules\@grpc\grpc-js\build\src\call-stream.js:418:22)
    at BaseStreamingInterceptingCall.start (D:\food_list\node_modules\@grpc\grpc-js\build\src\client-interceptors.js:275:19) {  code: 14,
  details: 'Name resolution failed for target firestore.googleapis.com:443',
  metadata: Metadata { internalRepr: Map {}, options: {} }
}

ps: 当我在没有网络的情况下运行应用程序时，该应用程序会崩溃。

Answer 1

错误堆栈跟踪说，这。

Emitted 'error' event on ClientReadableStreamImpl instance at:

这意味着错误被抛出是因为流正在发出一个错误事件，而你没有处理该事件。你可以通过调用 stream.on('error', callback) 在你阅读的流上。