情况很简单：我正在使用npm mssql包来建立数据库连接使用池的方法。初始化池我只是做：

const poolPromise = new sql.ConnectionPool(config)
  .connect()
  .then(pool => {
    console.log('<---- POOL CONNECTED TO MSSQL ---->')
    return pool;
  }, error => {
    console.log('<---- DATABASE IS DOWN ---->')
  }).catch(err => {
    // HERE I LOG THE ERROR SOMEWHERE ELSE
    console.log('Database Connection Failed! Bad Config: ', err)
  });

module.exports = {
  sql, poolPromise
}

现在，问题是数据库服务器现在有点不稳定。有时它会宕机一段时间。这是DB人员必须解决的问题，但我希望能够通知UI DB在某个时候宕机。然而，引发的异常并没有被catch块捕获。它只是在nodejs控制台中写入以下内容：

(node:2962) UnhandledPromiseRejectionWarning: ConnectionError: Failed to connect to <serverIP>:1433 - connect ETIMEDOUT <severIP>:1433
    at Connection.tedious.once.err (/project/node_modules/mssql/lib/tedious.js:239:17)
    at Object.onceWrapper (events.js:277:13)
    at Connection.emit (events.js:189:13)
    at Connection.EventEmitter.emit (domain.js:441:20)
    at Connection.socketError (/project/node_modules/tedious/lib/connection.js:1024:14)
    at /project/node_modules/tedious/lib/connection.js:868:25
    at Socket.onError (/project/node_modules/tedious/lib/connector.js:49:9)
    at Socket.emit (events.js:189:13)
    at Socket.EventEmitter.emit (domain.js:441:20)
    at emitErrorNT (internal/streams/destroy.js:82:8)
(node:2962) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:2962) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

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你们有什么想法如何捕捉这个特定的事件被正确记录。