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.net 4.0 DurableInstance中的System.Runtime.CallbackException

.net-4.0 windows-services workflow

.net 4.0 DurableInstance中的System.Runtime.CallbackException,.net-4.0,windows-services,workflow,workflow-foundation-4,workflowservice,.net 4.0,Windows Services,Workflow,Workflow Foundation 4,Workflowservice,最近，我开始在我的工作流应用程序中遇到此异常 System.Runtime.CallbackException，System.Runtime.DurableInstance，版本=4.0.0.0，区域性=中立，PublicKeyToken=31bf3856ad364e35 用户回调引发异常。检查异常堆栈和内部异常以确定失败的回调。 我通过运行以下类的Windows服务承载我的服务： public class WorkflowHost { private readonly List<

最近，我开始在我的工作流应用程序中遇到此异常

System.Runtime.CallbackException，System.Runtime.DurableInstance，版本=4.0.0.0，区域性=中立，PublicKeyToken=31bf3856ad364e35

用户回调引发异常。检查异常堆栈和内部异常以确定失败的回调。

我通过运行以下类的Windows服务承载我的服务：

public class WorkflowHost
{
    private readonly List<string> _services = new List<string>();

    private readonly Dictionary<string, WorkflowServiceHost> _hosts = new Dictionary<string, WorkflowServiceHost>();

    public WorkflowHost(IList<string> serviceNames)
    {
        foreach (string serviceName in serviceNames)
        {
            _services.Add(serviceName);
        } 
    }

    public void Start() 
    { 
        if (_hosts.Count > 0) 
        { 
            Stop(); 
        } 

        foreach(string serviceName in _services) 
        {
            WorkflowService service = LoadService(serviceName);                
            WorkflowServiceHost host = new WorkflowServiceHost(service);

            host.Faulted += new EventHandler(host_Faulted);

            try
            {
                host.Open();
            }
            catch (Exception e)
            {
                Debug.WriteLine(e.Message);
            }

            _hosts.Add(serviceName, host); 
        } 
    }

    void host_Faulted(object sender, EventArgs e)
    {
        Debug.WriteLine("Service Faulted");

        Start();
    }

    public void Stop() 
    { 
        if (_hosts.Count > 0) 
        { 
            foreach (string serviceName in _services) 
            {                    
                IDisposable host = _hosts[serviceName]; 
                host.Dispose(); 
            } 

            _hosts.Clear(); 
        } 
    } 

    private WorkflowService LoadService(String xamlxName)
    {
        string fullFilePath = Path.Combine(@"..\..\..\Services\Sales Funnel Workflow", xamlxName);

        WorkflowService service = XamlServices.Load(fullFilePath) as WorkflowService;

        if (service != null)
        {
            return service;
        }
        else
        {
            throw new NullReferenceException(string.Format("Unable to load service definition from {0}", fullFilePath));
        }
    }
}

公共类工作流主机
{
私有只读列表_services=new List（）；
专用只读词典_hosts=new Dictionary（）；
公共工作流主机（IList ServiceName）
{
foreach（serviceNames中的字符串serviceName）
{
_services.Add（serviceName）；
} 
}
公开作废开始（）
{ 
如果（_hosts.Count>0）
{ 
停止（）；
} 
foreach（字符串serviceName in_services）
{
WorkflowService=LoadService（serviceName）；
WorkflowServiceHost主机=新的WorkflowServiceHost（服务）；
host.Faulted+=新的EventHandler（host\u Faulted）；
尝试
{
host.Open（）；
}
捕获（例外e）
{
Debug.WriteLine（e.Message）；
}
_添加（serviceName，host）；
} 
}
无效主机\出现故障（对象发送方，事件参数e）
{
Debug.WriteLine（“服务故障”）；
Start（）；
}
公共停车场（）
{ 
如果（_hosts.Count>0）
{ 
foreach（字符串serviceName in_services）
{                    
IDisposable主机=_主机[serviceName]；
host.Dispose（）；
} 
_hosts.Clear（）；
} 
} 
私有WorkflowService加载服务（字符串xamlxName）
{
字符串fullFilePath=Path.Combine（@.\..\..\Services\Sales漏斗工作流），xamlxName）；
WorkflowService=XamlServices.Load（fullFilePath）作为WorkflowService；
if（服务！=null）
{
回程服务；
}
其他的
{
抛出新的NullReferenceException（string.Format（“无法从{0}，fullFilePath）加载服务定义”）；
}
}
}
以下是异常的完整堆栈跟踪：

<StackTrace>
at System.ServiceModel.Channels.CommunicationObject.OnFaulted()
at System.ServiceModel.Channels.CommunicationObject.Fault()
at System.ServiceModel.Channels.CommunicationObject.Fault(Exception exception)
at  System.ServiceModel.Activities.Dispatcher.DurableInstanceManager.WaitAndHandleStoreEventsCallback(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.AsyncCompletionWrapperCallback(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.DurableInstancing.InstanceHandle.WaitForEventsAsyncResult.Canceled()
at System.Runtime.DurableInstancing.InstanceHandle.Free()
at System.Activities.DurableInstancing.SqlWorkflowInstanceStoreLock.MarkInstanceOwnerLost(Int64 surrogateLockOwnerId)
at System.Activities.DurableInstancing.SqlWorkflowInstanceStoreLock.MarkInstanceOwnerLost(Int64 surrogateLockOwnerId, Boolean hasModificationLock)
at System.Activities.DurableInstancing.LockRenewalTask.HandleError(Exception exception)
at System.Activities.DurableInstancing.PersistenceTask.CommandCompletedCallback(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.Activities.DurableInstancing.SqlWorkflowInstanceStoreAsyncResult.StartOperation()
at System.Activities.DurableInstancing.SqlWorkflowInstanceStoreAsyncResult.StartOperationCallback(Object state)
at System.Runtime.ActionItem.DefaultActionItem.Invoke()
at System.Runtime.ActionItem.CallbackHelper.InvokeWithoutContext(Object state)
at System.Runtime.IOThreadScheduler.ScheduledOverlapped.IOCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
</StackTrace>
<ExceptionString>System.Runtime.CallbackException: A user callback threw an exception.  Check the exception stack and inner exception to determine the callback that failed. ---&gt; System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Activities.WorkflowServiceHost, cannot be used for communication because it is in the Faulted state.
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
   at System.ServiceModel.ServiceHostBase.System.IDisposable.Dispose()
   at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Stop() in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 67
   at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Start() in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 30
   at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.host_Faulted(Object sender, EventArgs e) in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 57
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.ServiceModel.Channels.CommunicationObject.OnFaulted()
   --- End of inner exception stack trace ---</ExceptionString>
<InnerException>
<ExceptionType>System.ServiceModel.CommunicationObjectFaultedException, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
<Message>The communication object, System.ServiceModel.Activities.WorkflowServiceHost, cannot be used for communication because it is in the Faulted state.</Message>
<StackTrace>
at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
at System.ServiceModel.ServiceHostBase.System.IDisposable.Dispose()
at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Stop() in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 67
at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Start() in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 30
at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.host_Faulted(Object sender, EventArgs e) in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 57
at System.EventHandler.Invoke(Object sender, EventArgs e)
at System.ServiceModel.Channels.CommunicationObject.OnFaulted()
</StackTrace>
<ExceptionString>System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Activities.WorkflowServiceHost, cannot be used for communication because it is in the Faulted state.
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
   at System.ServiceModel.ServiceHostBase.System.IDisposable.Dispose()
   at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Stop() in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 67
   at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Start() in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 30
   at Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.host_Faulted(Object sender, EventArgs e) in C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service\WorkflowHost.cs:line 57
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.ServiceModel.Channels.CommunicationObject.OnFaulted()</ExceptionString>
</InnerException>
</Exception>


位于System.ServiceModel.Channels.CommunicationObject.OnFaulted（）处
在System.ServiceModel.Channels.CommunicationObject.Fault（）处
在System.ServiceModel.Channels.CommunicationObject.Fault处（异常）
位于System.ServiceModel.Activities.Dispatcher.DurableInstanceManager.WaitAndHandleStoreEventsCallback（IAsyncResult结果）
在System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame（IAsyncResult结果）中
在System.Runtime.AsyncResult.Complete（布尔同步完成）
在System.Runtime.AsyncResult.AsyncCompletionWrapperCallback（IAsyncResult结果）时
在System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame（IAsyncResult结果）中
在System.Runtime.AsyncResult.Complete（布尔同步完成）
在System.Runtime.DurableInstance.InstanceHandle.WaitForEventsAsyncResult.Cancelled（）中
在System.Runtime.DurableInstance.InstanceHandle.Free（）中
位于System.Activities.DurableInstance.SqlWorkflowInstanceStoreLock.MarkInstanceOwnerLost（Int64代理锁所有者ID）
位于System.Activities.DurableInstance.SqlWorkflowInstanceStoreLock.MarkInstanceOwnerLost（Int64代理锁所有者ID，布尔值hasModificationLock）
位于System.Activities.DurableInstance.LockRenewalTask.HandleError（异常）
位于System.Activities.DurableInstance.PersistenceTask.CommandCompletedCallback（IAsyncResult结果）
在System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame（IAsyncResult结果）中
在System.Runtime.AsyncResult.Complete（布尔同步完成）
在System.Runtime.AsyncResult.Complete（布尔同步完成，异常异常）
位于System.Activities.DurableInstance.SqlWorkflowInstanceStoreAsyncResult.StartOperation（）处
位于System.Activities.DurableInstance.SqlWorkflowInstanceStoreAsyncResult.StartOperationCallback（对象状态）
在System.Runtime.ActionItem.DefaultActionItem.Invoke（）中
在System.Runtime.ActionItem.CallbackHelper.InvokeWithoutContext（对象状态）中
在System.Runtime.IOThreadScheduler.ScheduledOverlapped.IOCallback（UInt32错误代码，UInt32个字节，NativeOverlapped*NativeOverlapped）
在System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame（UInt32错误，UInt32字节读取，NativeOverlapped*NativeOverlapped）
在System.Threading.\u IOCompletionCallback.PerformiCompletionCallback（UInt32错误代码，UInt32个字节，本机重叠*pOVERLAP）
System.Runtime.CallbackException:用户回调引发异常。检查异常堆栈和内部异常以确定失败的回调。--System.ServiceModel.CommunicationObjectFaultedException:通信对象System.ServiceModel.Activities.WorkflowServiceHost无法用于通信，因为它处于故障状态。
在System.ServiceModel.Channels.CommunicationObject.Close处（TimeSpan超时）
位于System.ServiceModel.ServiceHostBase.System.IDisposable.Dispose（）处
在C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Stop（）中
在C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.Start（）中的Zeller.SalesFunnel.Start（）处：第30行
在C:\Projects\TFS\Zeller Corp Toolkit\Main\Toolkit\Services\ZSalesFunnelService\Zeller.SalesFunnel.WorkFlow.Service.WorkflowHost.host中出现错误（对象发送方，事件参数e）：第57行
在System.EventHandler.Invoke（对象发送方，EventArgs e）
在System.ServiceModel.Channels.CommunicationsObjec