Question

我已根据Azure Durable Function示例的结构创建了Fan-out / Fan-In（使用推荐的VS 2017开发，而不是Azure门户方法）

我所遇到的是，从OrchestrationTrigger方法调用的第一个Azure函数被一遍又一遍地调用，并且永远不会继续到下一个语句。现在，虽然我已经阅读了Event Sourcing，Checkpointing和Orchestrator Replay文档以及Orchestrator Code Constraints，但我仍然有点困惑，因为本地调试因重播而非常棘手。

[FunctionName("ExportLogs")]
public static async Task ExportLogs([OrchestrationTrigger] DurableOrchestrationContext context)
{
    SinceDate since = context.GetInput<SinceDate>();
    var sinceDate = DateTime.Parse(since.since);

    var conversationInfos = await context.CallActivityAsync<IEnumerable<ConversationInfo>>("GetConversations", sinceDate);

    // !! I never get to this statement
    var tasks = new List<Task<CallInfo>>(conversationInfos.Count());
    foreach (var ci in conversationInfos)
    {
        Task<CallInfo> task = context.CallActivityAsync<CallInfo>("ProcessCall", ci);
        task.Start();
        var notused = task.ContinueWith(t => context.CallActivityAsync("PersistCallInStorage", t.Result));
        tasks.Add(task);
    }
    await Task.WhenAll(tasks);

    // Now fan-in and persist all results.
    var callInfos = tasks.Select(t => t.Result);
    var connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;
    var repo = new DwRepository(connectionString);
    repo.AddCallInfos(callInfos);
}

第一个被调用的活动是：

[FunctionName("GetConversations")]
public static IEnumerable<ConversationInfo> GetConversations([ActivityTrigger] DateTime sinceDate, TraceWriter log)
{
    var exportService = ConstuctExportService();
    var conversations = exportService.GetAllConversations(sinceDate);
    return conversations;
}

现在，exportService.GetAllConversations(sinceDate);正在调用SDK，该SDK通过REST从云服务获取一些呼叫信息。它确实需要循环并获取页面中的数据。所以正在发生的事情就是这个被一遍又一遍地调用而且永远不会继续，即使我正在等待这个电话。

以下是Function Runtime输出窗口的输出：

[10/23/2017 7:25:43 PM] Function started (Id=8e62e6bd-34a9-49b7-a814-3a0e9e5f9f8e)
[10/23/2017 7:25:43 PM] Executing 'ExportRscCallLogs' (Reason='', Id=8e62e6bd-34a9-49b7-a814-3a0e9e5f9f8e)
[10/23/2017 7:25:43 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'ExportRscCallLogs (Orchestrator)', version '' started. IsReplay: False. Input: (22 bytes). State: Started. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:25:44 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' scheduled. Reason: ExportRscCallLogs. IsReplay: False. State: Scheduled. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:25:44 PM] Function completed (Success, Id=8e62e6bd-34a9-49b7-a814-3a0e9e5f9f8e, Duration=114ms)
[10/23/2017 7:25:44 PM] Executed 'ExportRscCallLogs' (Succeeded, Id=8e62e6bd-34a9-49b7-a814-3a0e9e5f9f8e)
[10/23/2017 7:25:44 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'ExportRscCallLogs (Orchestrator)', version '' awaited. IsReplay: False. State: Awaited. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:25:44 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' started. IsReplay: False. Input: (23 bytes). State: Started. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:25:44 PM] Function started (Id=3c33ff3b-5fe5-4e6b-a7d4-ac6c3e146633)
[10/23/2017 7:25:44 PM] Executing 'GetConversations' (Reason='', Id=3c33ff3b-5fe5-4e6b-a7d4-ac6c3e146633)
[10/23/2017 7:25:47 PM] Function completed (Success, Id=3c33ff3b-5fe5-4e6b-a7d4-ac6c3e146633, Duration=2824ms)
[10/23/2017 7:25:47 PM] Executed 'GetConversations' (Succeeded, Id=3c33ff3b-5fe5-4e6b-a7d4-ac6c3e146633)
[10/23/2017 7:25:47 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' completed. ContinuedAsNew: False. IsReplay: False. Output: (435216 bytes). State: Completed. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:25:54 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' started. IsReplay: False. Input: (23 bytes). State: Started. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:25:54 PM] Function started (Id=d89b2fa4-f4d7-43e5-95f1-5cf436ebc85e)
[10/23/2017 7:25:54 PM] Executing 'GetConversations' (Reason='', Id=d89b2fa4-f4d7-43e5-95f1-5cf436ebc85e)
[10/23/2017 7:25:56 PM] Function completed (Success, Id=d89b2fa4-f4d7-43e5-95f1-5cf436ebc85e, Duration=1397ms)
[10/23/2017 7:25:56 PM] Executed 'GetConversations' (Succeeded, Id=d89b2fa4-f4d7-43e5-95f1-5cf436ebc85e)
[10/23/2017 7:25:56 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' completed. ContinuedAsNew: False. IsReplay: False. Output: (435216 bytes). State: Completed. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:26:05 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' started. IsReplay: False. Input: (23 bytes). State: Started. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.
[10/23/2017 7:26:05 PM] Function started (Id=fb240d9c-90f0-4e4d-86db-b3d2c175e0eb)
[10/23/2017 7:26:05 PM] Executing 'GetConversations' (Reason='', Id=fb240d9c-90f0-4e4d-86db-b3d2c175e0eb)
[10/23/2017 7:26:06 PM] Function completed (Success, Id=fb240d9c-90f0-4e4d-86db-b3d2c175e0eb, Duration=1177ms)
[10/23/2017 7:26:06 PM] Executed 'GetConversations' (Succeeded, Id=fb240d9c-90f0-4e4d-86db-b3d2c175e0eb)
[10/23/2017 7:26:06 PM] b350f681b17b4ac8a772fff8fdca3aad: Function 'GetConversations (Activity)', version '' completed. ContinuedAsNew: False. IsReplay: False. Output: (435216 bytes). State: Completed. HubName: DurableFunctionsHub. AppName: . SlotName: . ExtensionVersion: 1.0.0.0.

正如您所看到的，日志反复显示Executing 'GetConversations'，并且甚至报告每次都成功完成。 IsReplay参数为False - 所以我不确定发生了什么？

非常感谢任何帮助。

Answer 1

感谢Chris Gillum在发布issue时发现问题的努力。他发现我最初的活动是

返回相对大量的数据（482564字节，或471 KB）。返回值被序列化为队列消息，Azure storage queues only support 64 KB messages。我怀疑运行时是没有优雅地处理它并导致它运行连续地进行。

Azure持久功能 - OrchestrationTrigger持续执行第一个等待的活动

1 个答案: