System.Runtime.CompilerServices.AsyncTaskMethodBuilder 上的 System.IO.FileNotFoundException

Question

我有以下代码

    try
    {
        using (var client = HttpClientBuilder.CreateClient(PingTimeoutMilliseconds, true))
        {
            var response = await Policy
                .Handle<Exception>(ex => ex is HttpRequestException || ex is TaskCanceledException)                        
                .WaitAndRetryAsync(new[]
                {
                    TimeSpan.FromSeconds(1),
                    TimeSpan.FromSeconds(3)
                }, (ex, timeSpan, retryCount, context) =>
                {
                    loggerService.Log(ex);
                    loggerService.Log($"Ping request failed. Waiting {timeSpan} seconds before next retry. Retry attempt {retryCount}");
                })
                .ExecuteAsync(() => client.SendAsync(new HttpRequestMessage(HttpMethod.Head, uri)));
            IsInternetAvailable = response.IsSuccessStatusCode;
            return response.IsSuccessStatusCode;
        }
    }

有些客户抱怨异常

Uitzonderingsinformatie: System.IO.FileNotFoundException

System.IO.FileNotFoundException

bij Showpad.OutlookDesktopAddIn.Infrastructure.Helpers.PingHelper+<IsInternetAvailableAsync>d__5.MoveNext()
    System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Start[[Showpad.OutlookDesktopAddIn.Infrastructure.Helpers.PingHelper+<IsInternetAvailableAsync>d__5, Showpad.OutlookDesktopAddIn, Version=2.7.6.0, Culture=neutral, PublicKeyToken=null]](<IsInternetAvailableAsync>d__5 ByRef)

我可能怀疑 Polly 库在第 5 行等待策略可能有问题（因为存在 IO 异常）

using Polly;

Answer 1

FileNotFoundException 有一个名为FileName(1) 的属性。

请先检查一下，原因请仔细检查FusionLog(1)。