Threads seem to be stuck on System.Xml.NameTable.Add

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  Hi,

  It seems that it is hard to reproduce this issue. The first thing come out to my mind is that you did not close threads in a correct way.

  Could you please provide some more code snippet that how you create threads and what you did in the threads?

  Thank you for your posting and understanding.

  Have a nice day.

  ---

  Paul Zhou [MSFT]
  MSDN Community Support | Feedback to us
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  Please remember to mark the replies as answers if they help and unmark them if they provide no help.
  
  

  Monday, October 31, 2011 7:57 AM
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  Thanks for offering to take a look.
  
  The call is initiated from component A which runs as a COM+ application. A is implemented in unmanaged C++:
  
  STDMETHODIMP CTpsServerTrampoline::processRequest(BSTR id, LONG nnpi, BSTR xmlRequest, BSTR* xmlResponse)
  {
      // Create an instance of the TPS server implementation component
      HRESULT hr, hr1;
      switch (nnpi)
      {
          // Use the PlanAPI
          case NNPI_PLANAPI:
          {
              // Create the object and call if successful
              CComPtr<IPlanServer2> pPlanServer;
              hr = pPlanServer.CoCreateInstance(id);
              if (SUCCEEDED(hr))
                  hr1 = pPlanServer->processRequest(xmlRequest, xmlResponse);
              break;
          }
  
  
  IPlanServer2 interface is implemented by Component B. B is also a COM+ application, but is implemented as C#.
  
  namespace NaviMedix.NaviNet.TradingPartner.Horizon.ServiceActivator
  {
      /// <summary>
      /// ServiceActivator needed for the time being so a next gen application can be displayed in core.
      /// </summary>
      [ComponentAccessControl(false)]
      [Transaction(TransactionOption.Supported)]
      [Guid("DBD6DDA4-D774-4DB5-9A98-96ED982FF1E6")]
      public class HorizonNextGenServiceActivator : ServicedComponent, IServiceActivator, IPlanServer2
      {
  
  
  //...
  //...
  
          public static XmlReferenceFile PlanCentralTransformFile
          {
              get { return Application.GetConstant<XmlReferenceFile>("TPPlanCentralTransformFile"); }
          }
  
  
          public string processRequest(string xmlRequest)
          {
              try
              {
                  // Load the request into a docuemnt, so we can look at it.
                  XmlDocument requestDoc = new XmlDocument();
                  requestDoc.LoadXml(xmlRequest);
  
                  string requestType = UtilityServiceConfig.GetRequestType(requestDoc);
  
                  switch(requestType)
                  {
                      case "ProcessServiceConfig":
                          return UtilityServiceConfig.LoadProcessServiceConfigResponse(requestDoc);
                      case "GetPlanCentralInfo":
                          return ProcessGetPlanCentralInfoRequest(requestDoc);
                      default:
                          throw new ApplicationException(string.Format("Unknown/unhandled request type: {0}", requestType));
                  }
              }
              catch (Exception exception)
              {
                  UtilityTPBaseException.HandleActivationException(exception, new FrameData("XmlRequest", xmlRequest));
                  throw;
              }
          }
  
  //...
  
          protected string ProcessGetPlanCentralInfoRequest(XmlDocument requestDoc)
          {
  //...
              XmlDocument responseDoc = GetPlanCentralInfoResponseWithPermissions(userID, officeID, officeClassification);
  //...
      }
  
          private static XmlDocument GetPlanCentralInfoResponseWithPermissions(string userID, string officeID, CurrentOffice.OfficeClassificationValue officeClassification)
          {
              // We can now get the capabilities that this user/office is configured to have.
              UserOfficeCapabilities userOfficeCapabilities = new UserOfficeCapabilities(Int32.Parse(userID), Int32.Parse(officeID));
  
              //get transform document
              XPathDocument transformDoc = PlanCentralTransformFile.Read<XPathDocument>();
  //...
  }
  
  The line where the error starts -> XPathDocument transformDoc = PlanCentralTransformFile.Read<XPathDocument>();
  
  This is the line corresponding to the line of the callstack -

  0156e9e8 1b672676 NaviMedix.Kernel.Xml.Type.XmlReferenceFileBase.Read[[System.__Canon, mscorlib]]()
  
  
  This is the call flow - the threads essentially are spun up from component A, which has as its registration script:
              ProgID = s 'NaviNetPublic.TpsServerTrampoline.1'
              VersionIndependentProgID = s 'NaviNetPublic.TpsServerTrampoline'
              ForceRemove 'Programmable'
              InprocServer32 = s '%MODULE%'
              {
                  val ThreadingModel = s 'Both'
              }
              'TypeLib' = s '{3FE621E4-1647-43AA-9060-9F54091E0662}'
  
  
  Please let me know if any other code/details are required.

   

  Thanks

  
  

  • Edited by raxraja Monday, October 31, 2011 1:59 PM edit

  Monday, October 31, 2011 1:58 PM
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  Few more details:

   

  The original call starts on a webserver on a separate box (i.e. on a thread in IIS). This is implemented in managed code (VB.NET). This thread then uses a COM+ object on the box. This COM+ object (which is also implemented as managed VB.NET), makes a call to another COM+ object (which is unmanaged C++).

   

  This object finally makes a remote DCOM call to the component A given in the post above. So component A actually lives on a separate box from where the original call is made.

  
  

  • Edited by raxraja Monday, October 31, 2011 2:28 PM

  Monday, October 31, 2011 2:27 PM
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  Hi,

  i didn't see any code to create any thread to work for XML read&write.

  It seems that it is related to DOM&IIS develoment. I suggest you post in IIS Forum to get better support.

  Thank you for your posting and understanding.

  ---

  Paul Zhou [MSFT]
  MSDN Community Support | Feedback to us
  Get or Request Code Sample from Microsoft
  Please remember to mark the replies as answers if they help and unmark them if they provide no help.
  
  

  • Marked as answer by Ed Price - MSFTMicrosoft employee Thursday, December 29, 2011 10:49 PM

  Tuesday, November 1, 2011 7:39 AM
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  This was moved out of the .NET forum.

  You can ask this in an IIS forum (as suggested).

  Or I can move it into a specific MSDN forum if you'd like.

  This is regarding your call:

  System.Xml.NameTable.Add(Char[], Int32, Int32)
  

   

  Thanks!

  ---

  Ed Price a.k.a User Ed, Microsoft Experience Program Manager (Blog, Twitter, Wiki)

  • Proposed as answer by Ed Price - MSFTMicrosoft employee Thursday, December 29, 2011 10:50 PM
  • Marked as answer by Ed Price - MSFTMicrosoft employee Thursday, December 29, 2011 10:50 PM

  Thursday, December 29, 2011 10:50 PM