Question

我有一个名为TableStorageController.cs

的班级

public class TableStorageController
{
    private static Dictionary<string, BlockingCollection<CloudModelDetail>> s_dictionary = new Dictionary<string, BlockingCollection<CloudModelDetail>>();
    private static StorageAccount s_azureStorageAccount;
    private readonly CloudModelDetail _cloudModelDetail;
    private static CancellationTokenSource s_cancellationTokenSource = new CancellationTokenSource();
    private static int s_retailerId;

    /// <summary>
    /// Static task to log transactions to Azure Table Storage after every 5 minutes.
    /// </summary>
    static TableStorageController()
    {
        try
        {
            Task.Run(async () =>
            {
                while (true)
                {
                    await Task.Delay(300000, s_cancellationTokenSource.Token);
                    foreach (var retaileridkey in s_dictionary.Keys)
                    {
                        var batchOperation = new TableBatchOperation();
                        while (s_dictionary[retaileridkey].Count != 0 && batchOperation.Count < 101)
                        {
                            batchOperation.InsertOrMerge(s_dictionary[retaileridkey].Take());
                        }
                        if (batchOperation?.Count != 0)
                            await s_azureStorageAccount.VerifyCloudTable.ExecuteBatchAsync(batchOperation);
                    }
                }
            });
        }
        catch (Exception ex)
        {
            s_log.Fatal("Azure task run failed", ex);
        }
    }
}

此任务旨在每5分钟运行一次，并将字典中存在的任何项目记录到Azure表存储。在本地运行我的代码时，我可以看到它在每5分钟后被触发。但是，不管怎样，一旦在另一个环境（生产）中部署之后，它就会失败。

有谁可以指出我错过了什么？

注意：我从未遇到异常Azure task run failed。

Answer 1

尝试将异常处理放在 Task.Run块中。您没有等待对Task.Run的调用，因此异常将被忽视。由于await Task.Delay已经是非阻塞的，我不明白为什么你需要额外的任务。试试这个：

static async void TableStorageController()
{
    try
    {
        while (true)
        {
            await Task.Delay(TimeSpan.FromMinutes(5), s_cancellationTokenSource.Token);
            foreach (var retaileridkey in s_dictionary.Keys)
            {
                var batchOperation = new TableBatchOperation();
                while (s_dictionary[retaileridkey].Count != 0 && batchOperation.Count < 101)
                {
                    batchOperation.InsertOrMerge(s_dictionary[retaileridkey].Take());
                }
                if (batchOperation?.Count != 0)
                    await s_azureStorageAccount.VerifyCloudTable.ExecuteBatchAsync(batchOperation);
            }
        }
    }
    catch (Exception ex)
    {
        s_log.Fatal("Azure task run failed", ex);
    }
}

顺便说一句，您也可以使用计时器而不是Task.Delay和CancellationToken

这项任务失败背后的原因是什么？

1 个答案: