我正在尝试使用函数中的tunnel-ssh访问服务器上外部托管的MongoDB数据库。运行隧道功能时没有出现任何错误，运行功能const client = await connectToMongodb(client2);时到达getDataFromMongoDB时似乎停滞了。当我在没有SSH的情况下在本地运行此程序时，一切正常，因此我认为这与SSH隧道组件有关。有人可以告诉我我在做什么错。

var config = {
  username: "myusername",privateKey: require("fs").readFileSync("../id_rsa"),host: "207.138.88.161",port: 22,dstHost: "11.12.97.2",dstPort: 27017,localHost: "127.0.0.1",localPort: 27000
};

tunnel(config,function(error,server) {
  //....
  if (error) {
    console.log(error);
  }
  console.log(server);

  getDataFromMongoDB();
});

async function getDataFromMongoDB(page) {
  const MongoClient = require("mongodb").MongoClient;
  const uri = "mongodb://username:password@11.12.97.2:27017/mydatabase";
  const client2 = new MongoClient(uri,{ useNewUrlParser: true });
  const client = await connectToMongodb(client2);
  const collection = client.db("mydatabase").collection("jobs");
  const jobs = await collection.find().toArray();
  client.close();
  client2.close();
  console.log(jobs);
}

function connectToMongodb(client) {
  return new Promise((resolve,reject) => {
    client.connect(function(err) {
      return resolve(client);
    });
  });
}