WCF+TransactionScopeRequired+async+throw fault=>ProtocolException“执行方法的事务已异步中止”

在使用异步主机实现(在我的示例中使用任务)并异步引发异常(即从延续引发)的服务上调用标记为“TransactionScopeRequired=true”的WCF操作,似乎总是会导致客户端接收到以下异常(而不是我引发的异常):

System.AggregateException: One or more errors occurred. ---> System.ServiceModel.ProtocolException: The transaction under which this method call was executing was asynchronously aborted.
   at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass6_0.<CreateTask>b__0(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait()
   at WcfTransactionScopeRequiredAsync.Program.Main(String[] args) in D:\\WcfTransactionScopeRequiredAsync\\WcfTransactionScopeRequiredAsync.Client\\Program.cs:line 19
---> (Inner Exception #0) System.ServiceModel.ProtocolException: The transaction under which this method call was executing was asynchronously aborted.
   at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass6_0.<CreateTask>b__0(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)<---

服务合同:

[ServiceContract]
public interface IService
{
    [FaultContract(typeof(SomeFault))]
    [TransactionFlow(TransactionFlowOption.Allowed)]
    [OperationContract]
    Task DoItAsync();
}

[OperationBehavior(TransactionScopeRequired = true)]
public async Task DoItAsync()
{
    using (TransactionScope tx = new TransactionScope(TransactionScopeOption.Required, TransactionScopeAsyncFlowOption.Enabled))
    {
        await Task.Delay(1000).ConfigureAwait(continueOnCapturedContext: false);
        throw new FaultException<SomeFault>(new SomeFault());
        tx.Complete();
    }
}

客户端是同步的:

service.DoItAsync().Wait();

在这种情况下,客户端不流动事务(因此这肯定不是分布式事务(通过检查transaction.Current.TransactionInformation.DistributeIdentifier进行验证)。

这段代码已经过测试。NET框架4.7.2。

到目前为止,我的研究表明,此ProtocolException是由服务主机上的WCF管道引发的(从异常中的堆栈跟踪中也可以看出),应该用于处理在主机控制之外中止的分布式事务(即DTC发出中止时)。虽然这似乎有点道理,但这里显然不是这样。

在主机上仍然使用异步实现时,是否有任何方法可以避免此ProtocolException?