Azure 云服务 - EventProcessor IEventProcessor.ProcessEventsAsync 未被命中

Question

我遇到了辅助角色的问题，该角色似乎成功启动并注册了 EventProcessor class 实现（EventProcessorA 和 EventProcessorB），但它们都没有接收到任何事件。通过这个，我的意思是方法 IEventProcessor.ProcessEventsAsync 根本没有被击中。

每个 EventProcessor class 都有自己的事件中心。

我的日志显示为 EventProcessor classes 调用了构造函数和 OpenAsync 方法。事实上，它们恰好被调用了 4 次，如下所示。但在此之后，不会再发生 activity。我猜 4 次是因为有四个分区。

SimpleEventProcessorA - Constructor
SimpleEventProcessorA - OpenAsync
SimpleEventProcessorA - Constructor
SimpleEventProcessorA - OpenAsync
SimpleEventProcessorA - Constructor
SimpleEventProcessorA - OpenAsync
SimpleEventProcessorB - Constructor
SimpleEventProcessorB - Open Async
SimpleEventProcessorB - Constructor
SimpleEventProcessorB - OpenAsync
SimpleEventProcessorB - Constructor
SimpleEventProcessorB - OpenAsync
SimpleEventProcessorB - Constructor
SimpleEventProcessorB - OpenAsync
SimpleEventProcessorA - Constructor
SimpleEventProcessorA - OpenAsync

也没有为 Worker 角色的 RunAsync 方法中的 EventProcessorOptions 提供偏移量，因此所有事件都应该涌入。

此外，在 Azure 门户中，当我启动事件时，我看到事件正在发生。

注册事件处理器的工作者角色代码：

public class WorkerRole : RoleEntryPoint
{
    private readonly CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
    private readonly ManualResetEvent runCompleteEvent = new ManualResetEvent(false);

    private EventProcessorHost eventProcessorHostA;
    private EventProcessorHost eventProcessorHostB;

    public override void Run()
    {
        Trace.TraceInformation("ReportWorkerRole is running");

        try
        {
            this.RunAsync(this.cancellationTokenSource.Token).Wait();
        }
        finally
        {
            this.runCompleteEvent.Set();
        }
    }

    public override bool OnStart()
    {
        // Set the maximum number of concurrent connections
        ServicePointManager.DefaultConnectionLimit = 12;

        // For information on handling configuration changes
        // see the MSDN topic at http://go.microsoft.com/fwlink/?LinkId=166357.

        bool result = base.OnStart();

        Trace.TraceInformation("ReportWorkerRole has been started");

        //EventHub Processing
        try
        {
            string eventHubNameA = CloudConfigurationManager.GetSetting("EventHubNameA");
            string eventHubNameB = CloudConfigurationManager.GetSetting("EventHubNameB");
            string eventHubConnectionString = CloudConfigurationManager.GetSetting("EventHubConnectionString");

            string storageAccountName = CloudConfigurationManager.GetSetting("AzureStorageAccount");
            string storageAccountKey = CloudConfigurationManager.GetSetting("AzureStorageAccountKey");
            string storageConnectionString = CloudConfigurationManager.GetSetting("AzureStorageAccountConnectionString");

            string eventProcessorHostNameA = Guid.NewGuid().ToString();
            eventProcessorHostA = new EventProcessorHost(eventProcessorHostNameA, eventHubNameA, EventHubConsumerGroup.DefaultGroupName, eventHubConnectionString, storageConnectionString);

            string eventProcessorHostNameB = Guid.NewGuid().ToString();
            eventProcessorHostB = new EventProcessorHost(eventProcessorHostNameB, eventHubNameB, EventHubConsumerGroup.DefaultGroupName, eventHubConnectionString, storageConnectionString);

        }
        catch (Exception ex)
        {
            //Logging omitted
        }

        return result;
    }

    public override void OnStop()
    {
        Trace.TraceInformation("ReportWorkerRole is stopping");

        this.eventProcessorHostA.UnregisterEventProcessorAsync().Wait();
        this.eventProcessorHostB.UnregisterEventProcessorAsync().Wait();

        this.cancellationTokenSource.Cancel();
        this.runCompleteEvent.WaitOne();

        base.OnStop();

        Trace.TraceInformation("ReportWorkerRole has stopped");
    }

    private async Task RunAsync(CancellationToken cancellationToken)
    {

        var options = new EventProcessorOptions()
        {
            MaxBatchSize = 100,
            PrefetchCount = 10,
            ReceiveTimeOut = TimeSpan.FromSeconds(20),
            //InitialOffsetProvider = (partitionId) => DateTime.Now
        };

        options.ExceptionReceived += (sender, e) =>
        {
            //Logging omitted
        };

        //Tried both using await and wait
        eventProcessorHostA.RegisterEventProcessorAsync<SimpleEventProcessorA>(options).Wait();
        eventProcessorHostB.RegisterEventProcessorAsync<SimpleEventProcessorB>(options).Wait();
        //await eventProcessorHostA.RegisterEventProcessorAsync<SimpleEventProcessorA>(options);
        //await eventProcessorHostB.RegisterEventProcessorAsync<SimpleEventProcessorB>(options);

        // TODO: Replace the following with your own logic.
        while (!cancellationToken.IsCancellationRequested)
        {
            Trace.TraceInformation("Working");
            await Task.Delay(1000);
        }
    }
}

事件处理器 A（与 B 的配置相同）：

class SimpleEventProcessorA : IEventProcessor
{

    Stopwatch checkpointStopWatch;

    //Non-relevant variables omitted

    public SimpleEventProcessorA()
    {
        try
        {
            //Initializing variables using CloudConfigurationManager

            //Logging omitted
        }
        catch (Exception ex)
        {
            //Logging omitted
        }
    }

    async Task IEventProcessor.CloseAsync(PartitionContext context, CloseReason reason)
    {
        //Logging omitted

        Console.WriteLine("Processor Shutting Down. Partition '{0}', Reason: '{1}'.", context.Lease.PartitionId, reason);
        if (reason == CloseReason.Shutdown)
        {
            await context.CheckpointAsync();
        }
    }

    Task IEventProcessor.OpenAsync(PartitionContext context)
    {
        try
        {
            //Logging omitted

            Console.WriteLine("Initialized.  Partition: '{0}', Offset: '{1}'", context.Lease.PartitionId, context.Lease.Offset);
            this.checkpointStopWatch = new Stopwatch();
            this.checkpointStopWatch.Start();

            return Task.FromResult<object>(null);
        }
        catch (Exception ex)
        {
            //Logging omitted 

            return Task.FromResult<object>(null);
        }
    }

    async Task IEventProcessor.ProcessEventsAsync(PartitionContext context, IEnumerable<EventData> messages)
    {
        //Logging omitted

        foreach (EventData eventData in messages)
        {
            try
            {
                //Logging omitted 

                Console.WriteLine(string.Format("Message received.  Partition: '{0}', Data: '{1}'",
                    context.Lease.PartitionId, data));
            }
            catch (Exception ex)
            {
                //Logging omitted

                throw;
            }
        }

        //Call checkpoint every 5 minutes, so that worker can resume processing from 5 minutes back if it restarts.
        if (this.checkpointStopWatch.Elapsed > TimeSpan.FromMinutes(5))
        {
            await context.CheckpointAsync();
            this.checkpointStopWatch.Restart();
        }
    }

}

非常感谢任何帮助，谢谢！

更新

看起来一切正常...这是我在将内容推送到事件中心时使用的连接字符串。

这是我的事件中心连接字符串：

Endpoint=sb://[myEventHubName].servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;entityPath=[old-eventhub-name];SharedAccessKey=[mykey]

entityPath 设置不正确。它使用的是我设置的旧事件中心名称。它应该是为 eventHubNameA 或 eventHubNameB 设置的值。

Answer 1

回答问题，以便其他人可以从中受益。虽然答案在 "UPDATE" 部分的问题中有详细说明，但我在这里重申一下：

entityPath 设置不正确。它使用的是我设置的旧事件中心名称。它应该是为 eventHubNameA 或 eventHubNameB 设置的值。

而不是 Endpoint=sb://[myEventHubName].servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;entityPath=[old-eventhub-name];SharedAccessKey=[mykey]

应该是Endpoint=sb://[myEventHubName].servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;entityPath=[eventHubNameA];SharedAccessKey=[mykey]

Azure 云服务 - EventProcessor IEventProcessor.ProcessEventsAsync 未被命中

Azure Cloud Service - EventProcessor IEventProcessor.ProcessEventsAsync not getting hit

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