我试图在一个循环中使用axios从localhost调用API，问题是有时它工作正常，但大多数错误发生。

cause: Error: connect ECONNREFUSED ::1:8000
      at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1494:16) {
    errno: -4078,
    code: 'ECONNREFUSED',
    syscall: 'connect',
    address: '::1',
    port: 8000
  }

字符串
或者这个错误

cause: Error: connect ETIMEDOUT xx:xxxx::xxx:xxxx:xxx
      at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1494:16) {
    errno: -4039,
    code: 'ETIMEDOUT',
    syscall: 'connect',
    address: 'xx:xxxx::xxx:xxxx:xxx',
    port: 443
  }

型
向此终结点发出请求：

app.get("/initialize-db", async (req, res) => {
  const response = await axios
    .get("http://localhost:8000/symbol-list")
    .catch(errorHandler);

  const recordCoiCexUrl = "http://localhost:8000/record-coi-cex";

  const symList = response.data;
  const requests = symList.map((element) => {
    axios.get(`${recordCoiCexUrl}/${element}`);
  });

  await axios.all(requests).catch(errorHandler);

  res.send("Initialize the database");
});

型
endpoint /record-coi-cex是这样的：

app.get("/record-coi-cex/:symbol", async (req, res) => {
  const symbol = req.params.symbol;
  const url = "https://webapi.niftytrader.in/webapi/option/fatch-option-chain";

  const response = await axios
    .get(url, {
      params: { symbol: symbol },
    })
    .catch(errorHandler);

  //* creating mongoose model with collection name same as symbol
  const Symbol = mongoose.model(symbol, oiDataSchema, symbol);

  //* parsing response from api to get the option data
  const opDatas = response.data.resultData.opDatas;

  //* important vaiables required
  const spot = opDatas[0].index_close;

  opDatas.sort((a, b) => {
    return a.strike_price < b.strike_price;
  });

  const atmIndex = opDatas.findIndex((obj) => obj.strike_price > spot);
  let total_puts_change_oi = 0;
  let total_calls_change_oi = 0;

  //* entry of all sp lying in range of 1000 points up and down
  const start = Math.max(0, atmIndex - 20);
  const end = Math.min(opDatas.length - 1, atmIndex + 20);
  for (let i = start; i <= end; i++) {
    const element = opDatas[i];
    const sp = element.strike_price;

    //* suming up coi of 10 strikes up-down
    if (Math.abs(i - atmIndex) <= 10) {
      total_puts_change_oi += element.puts_change_oi;
      total_calls_change_oi += element.calls_change_oi;
    }
    //* storing coi of 20 strikes up-down in db
    const doc = await Symbol.findOne({ strikePrice: sp }).catch(errorHandler);
    const oiArray = {
      putsCoi: element.puts_change_oi,
      callsCoi: element.calls_change_oi,
    };

    if (!doc) {
      await Symbol.create({ strikePrice: sp, oiArray }).catch(errorHandler);
    } else {
      await Symbol.updateOne({ strikePrice: sp }, { $push: { oiArray } }).catch(
        errorHandler
      );
    }
  }

型
当我尝试为一个端点进行API调用时，它工作正常，有时在循环内也工作正常，但错误的原因是什么？如何克服这个问题？