源代码如下：

  init(db){

    this.db = db

  }

  async getDocument(colletion,document){

    let dd

    let that = this

    try {

      dd = await that.db.collection(colletion).doc(document).get()

      console.log('读取数据库:集合：' + colletion + '，记录：'+document+'成功:'+dd)

      return dd.data

    } catch (e) {

      console.error('读取数据库错误:' + e + '集合：' + colletion + '，记录：'+document)

      return undefined

    }

  }

  async setDocument(colletion,document,data){

    let dd

    let that = this

    try {

      dd = await that.db.collection(colletion).doc(document).set({data: data})

      console.log('修改数据库:集合：' + colletion + '，记录：'+document+'成功:')

      return dd

    } catch (e) {

      console.error(e)

      console.log('修改数据库错误（集合，记录，数据）：', colletion, document,data)

      return undefined

    }

  }

  async addDocument(colletion,document,data){

    let that = this

    data._id = document

    try{

      await that.db.collection(colletion).add({ //建立currentFlow

        data: data

      })

      return 'SUCCESS'

    }catch(e){

      console.error(e)

      console.log('数据库增加数据错误（集合，记录，数据）：', colletion, document,data)

      return 'FAIL'

    }

  }

}

但是云端都没报错，在本地调试频繁报错：

document.get:fail -501001 resource system error. ESOCKETTIMEDOUT

Your current request database.getDocument is longer than 3s, it may be due to the network or your query performance | [17e84cdf8bb_31]

(anonymous) @ httpRequest.js:133

listOnTimeout @ internal/timers.js:549

processTimers @ internal/timers.js:492

Timeout (async)

init @ internal/inspector_async_hook.js:25

emitInitNative @ internal/async_hooks.js:144

emitInitScript @ internal/async_hooks.js:346

initAsyncResource @ internal/timers.js:153

Timeout @ internal/timers.js:186

setTimeout @ timers.js:146

setSlowWarning @ httpRequest.js:128

exports.default @ httpRequest.js:371

send @ dbRequest.js:31

get @ document.js:182

(anonymous) @ index.js:1274

get @ index.js:1270

getDocument @ Database.js:13

_getFromDB @ index.js:162

exports.main @ index.js:85

(anonymous) @ node.js:1

processTicksAndRejections @ internal/process/task_queues.js:97

Promise.then (async)

(anonymous) @ node.js:1

emit @ events.js:328

endReadableNT @ _stream_readable.js:1201

processTicksAndRejections @ internal/process/task_queues.js:84

TickObject (async)

init @ internal/inspector_async_hook.js:25

emitInitNative @ internal/async_hooks.js:144

emitInitScript @ internal/async_hooks.js:346

nextTick @ internal/process/task_queues.js:135

endReadable @ _stream_readable.js:1190

Readable.read @ _stream_readable.js:420

flow @ _stream_readable.js:979

emitReadable_ @ _stream_readable.js:572

onEofChunk @ _stream_readable.js:536

readableAddChunk @ _stream_readable.js:253

Readable.push @ _stream_readable.js:214

parserOnMessageComplete @ _http_common.js:150

HTTPINCOMINGMESSAGE (async)

init @ internal/inspector_async_hook.js:25

emitInitNative @ internal/async_hooks.js:144

connectionListenerInternal @ _http_server.js:423

defaultTriggerAsyncIdScope @ internal/async_hooks.js:313

connectionListener @ _http_server.js:399

emit @ events.js:316

onconnection @ net.js:1558

这些现象之前不频繁出现。直到去年底升级新版本后频繁出现！！

做了以下措施都失败：

1.回退到21年2月份的开发者工具版本；

2.把wx-server-sdk包重新安装

3.把后台响应时间从10秒变成60秒