带有未处理异常的任务在瞄准.net 4.0时不会被拆除
本文关键字:0时 net 异常 未处理 任务 | 更新日期: 2023-09-27 18:13:27
根据http://blogs.msdn.com/b/pfxteam/archive/2009/05/31/9674669.aspx,有异常的任务应该拆除应用程序。
然而,在任务未处理的异常中,可接受的答案指出,在。net 4.5中,行为被更改为不拆除应用程序,我试图在MSVS 2013中重现崩溃行为,我无法让应用程序在瞄准。net 4.5时崩溃(这是预期的),但即使当我瞄准。net 4.0时,应用程序仍然在我通过弱引用检查任务不再存活后继续运行。
class Program
{
private static WeakReference _ThrowingExceptionOnATaskRun()
{
Task t = Task.Factory.StartNew(() =>
{
Console.WriteLine("Throwing exception in a task!");
throw new NotImplementedException("Not implemented");
});
return new WeakReference(t);
}
static void MyMain()
{
Console.WriteLine("Main start");
WeakReference weakReference = _ThrowingExceptionOnATaskRun();
CheckIfAlliveForceGc(weakReference);
CheckIfAlliveForceGc(weakReference);
CheckIfAlliveForceGc(weakReference);
CheckIfAlliveForceGc(weakReference);
Console.WriteLine("Enter something:");
string userInput = Console.ReadLine();
Console.WriteLine("You entered : {0}", userInput);
Console.WriteLine("Done...");
Console.Read();
}
private static void CheckIfAlliveForceGc(WeakReference weakReference)
{
Console.WriteLine("Is reference alive : {0}", weakReference.IsAlive);
Thread.Sleep(2000);
GC.Collect();
GC.WaitForPendingFinalizers();
}
static void Main(string[] args)
{
MyMain();
}
}
输出Main start
Is reference alive : True
Throwing exception in a task!
Is reference alive : False
Is reference alive : False
Is reference alive : False
Enter something:
hello
You entered : hello
Done...
你需要在你的app/web中添加一个config元素。配置以保持旧的行为:
<runtime>
<ThrowUnobservedTaskExceptions enabled="true"/>
</runtime>