快速总结我现在所知道的

我有一个 EventWaitHandle我创建然后关闭。当我尝试使用 重新创建它时this ctor ，会抛出“访问路径...被拒绝”异常。这种异常很少见，大多数时候它只是重新创建了 EventWaitHandle正好。通过下面(由我)发布的答案，我可以成功调用 EventWaitHandle.OpenExisting并在抛出异常的情况下继续，但是，EventWaitHandle 的构造函数应该为我做这件事，对吗？这不就是out parameter , createdNew是为了？

初始问题

我在同一台服务器上有以下架构、Windows 服务和 Web 服务。 Web 服务通过打开和设置 Windows 服务正在等待的等待句柄来告诉 Windows 服务它必须工作。

通常一切都完美无缺，我能够启动/停止 Windows 服务而不会出现任何问题。但是，有时当我停止Web服务然后再次启动它时，它会完全无法创建等待句柄，从而破坏了整个架构。

我特别需要找出破坏事件等待句柄的原因并停止它。当等待句柄“中断”时，我必须重新启动 Windows，然后它才能再次正常运行，这显然不理想。

更新:抛出异常和问题日志

我在 Web 服务正在工作时重新启动了 Windows 服务，希望能引起问题，结果确实如此!一些类(class)名称因公司匿名而被审查

12:00:41,250 [7] - Stopping execution due to a ThreadAbortException
System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.SleepInternal(Int32 millisecondsTimeout)
   at OurCompany.OurProduct.MyClass.MyClassCore.MonitorRequests()

12:00:41,328 [7] - Closing Event Wait Handle
12:00:41,328 [7] - Finally block reached


12:00:42,781 [6] - Application Start
12:00:43,031 [6] - Creating EventWaitHandle: Global\OurCompany.OurProduct.MyClass.EventWaitHandle
12:00:43,031 [6] - Creating EventWaitHandle with the security entity name of : Everyone

12:00:43,078 [6] - Unhandled Exception 
System.UnauthorizedAccessException: Access to the path 'Global\OurCompany.OurProduct.MyClass.EventWaitHandle' is denied.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.Threading.EventWaitHandle..ctor(Boolean initialState, EventResetMode mode, String name, Boolean& createdNew, EventWaitHandleSecurity eventSecurity)
   at OurCompany.OurProduct.MyClassLibrary.EventWaitHandleFactory.GetNewWaitHandle(String handleName, String securityEntityName, Boolean& created)
   at OurCompany.OurProduct.MyClassLibrary.EventWaitHandleFactory.GetNewEventWaitHandle()
   at OurCompany.OurProduct.MyClass.MyClassCore..ctor()

// I ran into security issues so I open the global EWH
//    and grant access to Everyone
var ewhSecurity = new EventWaitHandleSecurity();

ewhSecurity.AddAccessRule(
 new EventWaitHandleAccessRule(
  "Everyone",
  EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify,
  AccessControlType.Allow));

this.ewh = new EventWaitHandle(
 false,
 EventResetMode.AutoReset,
 @"Global\OurCompany.OurProduct.MyClass.EventWaitHandle",
 out created,
 ewhSecurity);

// the variable "created" is logged

// wait until the web service tells us to loop again
this.ewh.WaitOne();

try
{
    while (true)
    {
        // entire service logic here
    }
}
catch (Exception e)
{
    // should this be in a finally, instead?
    if (this.ewh != null)
    {
        this.ewh.Close();
    }
}

// NOTE: the wait handle is a member variable on the web service
this.existing_ewh = EventWaitHandle.OpenExisting(
    @"Global\OurCompany.OurProduct.MyClass.EventWaitHandle");

// wake up the windows service
this.existing_ewh.Set();

最佳答案

在 Windows 服务上创建等待句柄的代码中，如果它失败(如访问被拒绝)，您可以尝试通过“打开现有的等待句柄”

EventWaitHandle.OpenExisting(
    @"Global\OurCompany.OurProduct.MyClass.EventWaitHandle",
    EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify);

关于c# - 我的 EventWaitHandle 说 "Access to the path is denied"，但不是，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/1784392/