IIS 7.5应用程序池回收不让方法完成

本文关键字：方法 应用 应用程序 程序池 IIS | 更新日期: 2023-09-27 18:13:29

我有两个方法:

public void Stop(bool immediate)
{
    Logger.Log(LogLevel.Debug, "Shutdown detected. Immediate: " + immediate);
    Shutdown();
    Logger.Log(LogLevel.Debug, "Unregistering");
    HostingEnvironment.UnregisterObject(this);
}
public void Shutdown()
{
    Logger.Log(LogLevel.Debug, "Preparing to stop UploadQueue");
    IsProcessing = false;
     //Set tasks to cancel to prevent queued tasks from parsing
     _cancellationTokenSource.Cancel();
     Logger.Log(LogLevel.Debug, "Waiting for " + _workerTasks.Count + " tasks to finish or cancel.");
     //Wait for tasks to finish
     Task.WaitAll(_workerTasks.Values.ToArray());
     Logger.Log(LogLevel.Debug, "Stopped UploadQueue");
}

类正在使用IRegisteredObject接口来接收关闭通知。在我的日志中，我得到这个:

2014-07-18 15:30:55,913,DEBUG,Shutdown detected. Immediate: False
2014-07-18 15:30:55,913,DEBUG,Preparing to stop UploadQueue
2014-07-18 15:30:55,913,DEBUG,Waiting for 35 tasks to finish or cancel.
...
bunch of stuff
...
2014-07-18 15:31:28,471,DEBUG,Shutdown detected. Immediate: True
2014-07-18 15:31:28,471,DEBUG,Preparing to stop UploadQueue
2014-07-18 15:31:28,471,DEBUG,Waiting for 0 tasks to finish or cancel.
2014-07-18 15:31:28,471,DEBUG,Stopped UploadQueue
2014-07-18 15:31:28,471,DEBUG,Unregistering

为什么它不是第一次到达Logger.Log(LogLevel.Debug, "Stopped UploadQueue"); ?看起来好像是在取消任务，让正在运行的任务完成。(任务在运行前检查是否已取消，否则执行任务)。

IIS 7.5应用程序池回收不让方法完成

From Task.WaitAll:

AggregationException:

至少有一个Task实例被取消 -或者-在执行至少一个Task实例期间抛出异常。如果任务被取消，AggregateException在其InnerExceptions集合中包含OperationCanceledException。

你正在通过_cancellationTokenSource.Cancel();取消你的任务，我假设这会导致其中至少一个抛出异常。您可能会在更高级别的堆栈框架中捕获它并忽略它。将Task.WaitAll封装在try-catch块中:

public void Shutdown()
{
    Logger.Log(LogLevel.Debug, "Preparing to stop UploadQueue");
    IsProcessing = false;
    //Set tasks to cancel to prevent queued tasks from parsing
    _cancellationTokenSource.Cancel();
    Logger.Log(LogLevel.Debug, "Waiting for " + _workerTasks.Count + " tasks to finish or cancel.");
     try
     {
         //Wait for tasks to finish
         Task.WaitAll(_workerTasks.Values.ToArray());
         Logger.Log(LogLevel.Debug, "Stopped UploadQueue");
     }
     catch (AggregationException e)
     {
         // Recover from the exception
     }
}
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