如何强制 WCF 线程中未处理的异常使进程崩溃?
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【中文标题】如何强制 WCF 线程中未处理的异常使进程崩溃?【英文标题】:How can I force unhandled exceptions in a WCF thread to crash the process? 【发布时间】:2010-10-06 13:29:13 【问题描述】:所以这是场景:
我有一个 WCF 服务,它为每个操作定义了一堆 FaultContract。我想安排它,以便如果在与有效的 FaultContract 不匹配的 WCF 服务线程中引发未处理的异常,它会关闭整个进程而不仅仅是线程。 (原因是我想要一个包含异常信息的故障转储,因为它与合同不匹配。)
有什么办法可以干净利落地做到这一点吗?我遇到的主要问题是 WCF 想要将我的所有异常转换为客户端故障,以保持服务运行;我其实是想把整个过程搞下来,这实质上就是规避 WCF 的正常行为。
【问题讨论】:
【参考方案1】:Environment.FailFast() 将创建故障转储;它不会运行任何挂起的 try-finally 块,也不会运行任何终结器。
【讨论】:
【参考方案2】:您需要使用IErrorHandler 来自定义WCF 的错误处理行为。在调用 (ServiceHost).Open() 之前“应用行为”。
例如(在 Main() 中查找显示“serviceHost.Description.Behaviors.Add(new FailBehavior());”的行):
class FailBehavior : IServiceBehavior
public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
return;
public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
Console.WriteLine("The FailFast behavior has been applied.");
var f = new FailOnError();
foreach(ChannelDispatcher chanDisp in serviceHostBase.ChannelDispatchers)
chanDisp.ErrorHandlers.Add(f);
public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
return;
class FailOnError : IErrorHandler
public bool HandleError(Exception error)
// this is called for every exception -- even ungraceful disconnects
if( !(error is CommunicationException) )
throw new TargetInvocationException( "WCF operation failed.", error );
else
throw new CommunicationException( "Unexpected communication problem. (see inner exception)", error );
// Unreachable
//return false; // other handlers should be called
public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
// Can't throw from here (it will be swallowed), and using Environment.FailFast
// will result in all crashes going to the same WER bucket. We could create
// another thread and throw on that, but instead I think throwing from HandleError
// should work.
//Console.WriteLine( "Unhandled exception: 0", error );
//Environment.FailFast("Unhandled exception thrown -- killing server");
class Program
static void Main( string[] args )
Console.WriteLine( "Greetings from the server." );
Uri uri = new Uri( "net.tcp://localhost:5678/ServerThatShouldCrash" );
using( ServiceHost serviceHost = new ServiceHost( typeof( Server ), uri ) )
Binding binding = _CreateBinding();
serviceHost.AddServiceEndpoint( typeof( IServer ),
binding,
uri );
serviceHost.Description.Behaviors.Add(new FailBehavior());
serviceHost.Open();
// The service can now be accessed.
Console.WriteLine( "The service is ready." );
Console.WriteLine( "\nPress <ENTER> to terminate service.\n" );
Console.ReadLine();
private static Binding _CreateBinding()
NetTcpBinding netTcp = new NetTcpBinding( SecurityMode.None );
netTcp.ReceiveTimeout = TimeSpan.MaxValue;
netTcp.ReliableSession.InactivityTimeout = TimeSpan.MaxValue;
return netTcp;
// end _CreateBinding()
【讨论】:
【参考方案3】:Application.Exit();
可能会这样做,但用户会丢失他们当时正在处理的任何内容。
【讨论】:
不幸的是,它还有不产生故障转储的问题。以上是关于如何强制 WCF 线程中未处理的异常使进程崩溃?的主要内容,如果未能解决你的问题,请参考以下文章
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