如何使用Bluebird Promise（@ google-cloud）解决“分页中未定义的响应”

Question

我花了相当长的时间对此问题进行故障排除，最后发现@ blue-cloud分页在使用bluebird promises时似乎中断了。如果我禁用了bluebird，它会起作用，但是由于该项目广泛使用了Bluebird Promise功能，因此很难删除Bluebird。有人知道还有其他解决方法吗？还是我应该向哪个模块提交错误报告？ （请注意，这似乎发生在任何分页功能中，例如monitoring.getDescriptors）

global.Promise = require('bluebird');
const { PubSub } = require('@google-cloud/pubsub');

(async () => {
  const keyFilename = 'lib/gcloud-auth.json';

  const pubSub = new PubSub({ keyFilename });
  console.log('topics:', await pubSub.getTopics().catch(e => e));
})();

输出：

topics GoogleError: Undefined response in pagination method callback.
    at fetchNextPageToken (/opt/app/node_modules/google-gax/build/src/paginationCalls/pagedApiCaller.js:55:26)
    at Http2CallStream.<anonymous> (/opt/app/node_modules/@grpc/grpc-js/build/src/client.js:93:17)
    at Http2CallStream.emit (events.js:215:7)
    at /opt/app/node_modules/@grpc/grpc-js/build/src/call-stream.js:97:22
    at processTicksAndRejections (internal/process/task_queues.js:75:11)
From previous event:
    at Paginator.run_ (/opt/app/node_modules/@google-cloud/pubsub/node_modules/@google-cloud/paginator/build/src/index.js:167:25)
    at PubSub.Class.<computed> (/opt/app/node_modules/@google-cloud/pubsub/node_modules/@google-cloud/paginator/build/src/index.js:61:34)
    at /opt/app/node_modules/@google-cloud/promisify/build/src/index.js:69:28
From previous event:
    at PubSub.wrapper (/opt/app/node_modules/@google-cloud/promisify/build/src/index.js:54:16)
    at /opt/app/lib/index.js:8:38
    at Object.<anonymous> (/opt/app/lib/index.js:9:3)
    at Module._compile (internal/modules/cjs/loader.js:956:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Function.Module.runMain (internal/modules/cjs/loader.js:1025:10)
    at internal/main/run_main_module.js:17:11 {
  note: 'Exception occurred in retry method that was not classified as transient'
}

Node 12.14.0
Alpine 3.11.2
@google-cloud/monitoring v1.7.0
@google-cloud/pubsub v1.2.0
google-gax v1.13.0
@grpc/grpc-js v0.6.15
bluebird v3.7.2

Answer 1

您的代码在节点10中可以与Bluebird promises一起使用（您可以检查它），但在节点12中却因以下原因而中断：https://github.com/grpc/grpc-node/pull/942

由于它仅影响gRPC（@grpc/grpc-js）的JavaScript实现，因此您可以要求Pub / Sub库使用似乎正常运行的旧版gRPC（用C ++编写）：

$ npm install grpc

const grpc = require('grpc');
...
const pubSub = new PubSub({ grpc, keyFilename });