urlerror(\n错误:操作无法完成)尝试启动datatask时出错

我有一个vapor服务器应用程序(托管在heroku上),它通过urlsession数据任务连接到外部api服务。

到目前为止,它一直工作得很好(在我的mac上本地运行时仍然可以工作),但是自从上次服务器重新启动以来,datatask每次都会抛出以下错误: URLError(_nsError: The operation could not be completed) .

我听说swift在linux上曾经遇到过urlsession的问题,但这些问题基本上都解决了。有人能解决这个问题吗?谢谢您!

代码:

func foo(task: RepeatedTask) {

        // get request to ZTM API
        guard let client = try? app.client() else {
            return
        }
        var urlComponents = URLComponents(string: Globals.API_URL)!
        urlComponents.queryItems = [
            URLQueryItem(name: "resource_id", value: Globals.RESOURCE_ID),
            URLQueryItem(name: "apikey", value: Globals.API_KEY),
            URLQueryItem(name: "type", value: "1")]
        let url = urlComponents.url
        let response = client.get(url!)


        let tempModel = response.flatMap(to: Model.self) { response -> EventLoopFuture<Model> in
            return try response.content.decode(Model.self)
            }.map(to: Model.self) { tempModel -> Model in
                tempModel.busArray.forEach {
                    $0.vehicleID = $0.Lines! + $0.Brigade!
                    $0.angle = 0
                }
                if Globals.myModel.busArray.isEmpty {
                    Globals.myModel.busArray = tempModel.busArray
                } else {
                    // add & remove buses
                    Globals.myModel.busArray.updateVehicleArray(using: tempModel.busArray)

                    // update coordinates + angle
                    Globals.myModel.busArray.updateCoordinates(using: tempModel.busArray)
                }
                return tempModel
        }
}

生成的URL urlComponents 是 https://api.um.warszawa.pl/api/action/busestrams_get/?resource_id=f2e5503e-927d-4ad3-9500-4ab9e55deb59&apikey=a86c68be-0117-4a88-838c-bcc2f6ba85f4&type=1