Azure 函數：當函數自動縮放時，函數被多次調用

Question

在Azure Queue中為queueitem添加了單個條目，但為同一個queueitem多次調用了函數，無法理解是什么問題，我們在函數中使用了Async/Await，代碼也是Async，下面是Azure函數設置，

下面是功能代碼，

public class CreateTempVMTempTablesFunction
{
    private static Container container;
    private static IProcessingFunctionService _processingFunctionService; 
    private static IAzureFunctionFailuresRepository _azureFunctionFailuresRepository;
    private static ITrackLogEventsService _trackLogEventsService;

    [FunctionName("CreateTempVMTempTablesFunction")]
    public static async Task Run([QueueTrigger("%environment-plan%" + AzureFunctionConstants.CreateTempTableQueue, Connection = "AzureWebJobsStorage")]string myQueueItem, ILogger log)
    {
        string ErrorMessage = string.Empty;
        var start = DateTime.Now;
        FunctionStatusEnum IsSuccess = FunctionStatusEnum.Success;
        log.LogInformation($"C# Queue trigger function processed: {myQueueItem} - {start}");

        Guid tempid = new Guid(myQueueItem);
        TempVM tempVM = new TempVM();
        try
        {
            container = BusinessLogic.Helpers.SimpleInjectorWebApiInitializer.InitializeSingleton();;
           
            _processingFunctionService = container.GetInstance<IProcessingFunctionService>();
            _azureFunctionFailuresRepository = container.GetInstance<IAzureFunctionFailuresRepository>();
            _trackLogEventsService = container.GetInstance<ITrackLogEventsService>();

            tempVM = await _processingFunctionService.GetById(tempid);
            if (tempVM != null)
            {
                FunctionStatusEnum IsAlreadyPerformed = await _azureFunctionFailuresRepository.GetAzureFunctionFailureStatus(AzureFunctionConstants.CreateTempVMTempTablesFunction, tempVM.Id);

                if (IsAlreadyPerformed != FunctionStatusEnum.Success)
                {
                        ResponseData response = await _processingFunctionService.CreateTempVMTempTables(tempid);
                }
                else
                {
                    ErrorMessage = AzureFunctionConstants.FunctionAlreadyProcessed;
                }
            }
            else
            {
                ErrorMessage = AzureFunctionConstants.TempVMNotFound;
            }
        }
        catch (Exception ex)
        {
            IsSuccess = FunctionStatusEnum.Failed;
            ErrorMessage = ex.ToString();
        }
        finally
        {
            AzureFunctionFailures azureFunctionFailures = new AzureFunctionFailures()
            {
                Id = Guid.NewGuid(),
                FunctionName = AzureFunctionConstants.CreateTempVMTempTablesFunction,
                QueueItem = myQueueItem,
                ErrorMessage = ErrorMessage,
                StartTime = start,
                EndTime = DateTime.Now,
                FailureTypeId = tempid,
                FunctionStatus = IsSuccess,
                ProcessTime = (DateTime.Now - start).TotalMilliseconds,
            };
            await _azureFunctionFailuresRepository.Add(azureFunctionFailures);
        }
        log.LogInformation($"End Time : {DateTime.Now} - QueueItem {myQueueItem}");
        log.LogInformation($"Total Time : {DateTime.Now - start} - QueueItem {myQueueItem}");
    }
}

我檢查了在隊列中添加條目的代碼，但只為一個隊列項添加了一個條目。 當為不同的隊列項在同一隊列中添加多個條目時發生此問題（即我僅添加了 24 個請求的負載測試），當運行單個隊列時，則不會發生這種情況，我們的功能在具有自動縮放功能的應用服務計划中

Answer 1

正如評論中提到的。 只需在函數的應用程序設置中將WEBSITE_MAX_DYNAMIC_APPLICATION_SCALE_OUT值設置為1 。