Starting in Windows 7 and Windows Server 2008 R2 you can now configure the Microsoft Distributed Transaction Coordinator (MSDTC) to listen on a specific RPC server port. This is great news for network or firewall administrators. No longer do you have...

Microsoft Distributed Transaction Coordinator (MS DTC) can be used to manage Oracle transactions in the following common scenarios: SQL/Oracle linked server, COM+ transactional components or the System.Transactions transaction using Oracle as a datastore...

Throughout this document you may refer to this diagram to help you see how the each step relates to the overall problem domain. At the beginning of each step the problem domain is specified: Problem Domain (letter) Contents Verify the DTC Service is started...

IIS 7.0 introduces WAS (Windows Process Activation Service) hosting architecture to support non-HTTP protocols such as named pipes, TCP and MSMQ. A separate Window service is provided for each non-HTTP protocol as the protocol listener and adapter. For...

SCENARIO ========= We have two WCF services hosted in an IIS virtual directory. One acts as a router(Intermediary.svc) and the other as the destination(primary.svc). For this scenario, we have both of these hosted in the same virtual directory but in...

Here we describe an interoperability issue with a WCF client consuming a Java web service and using MutualCertificateDuplex binding with X509 certificates. In this case, after doing the required configuration, the WCF client was throwing the following...

http://msdn.microsoft.com/en-us/netframework/webservicesinterop.aspx has the following case studies which are a great resource for interop scenarios and have been tested with specific vendors. Resources Case Studies Whitepapers ...

In the recent past, the PSSCOR2 debugger extension was made public. This debugger extension contains a very useful command called !aspxpages which shows you information about various asp.net requests running in the dump, the time they have been executing...

Resolution: You may receive this error if you do not have the required prerequisites installed. Before installing a hotfix please review the prerequisites section of the hotfix knowledge base article and confirm that you have the proper operating system...

Typically we expect that a piece of code that works once should work ALWAYS but this is not as simple as it sounds. Even though you have tested your component or application enough, it is not always possible to test all the codepaths and all sorts of...

In very rare conditions in the past, it may have been necessary to take steps to rebuild the COM+ catalog. In Windows 2003, for example, this was performed by walking through Add / Remove Windows Components, however, in Windows 2008, this is no longer...

Making things work with a disparate entity is always a difficult task to accomplish. Things are no different in WCF Interoperability space. While significant developments have been made over the years to standardize various protocols and develop products...

WCF Routing Service is a new feature introduced with WCF 4.0. While this article is not about explaining what it is (complete details about WCF Routing Service is available here ), I must admit that this new feature is simply awesome. It has made pain...

Using an intermediate device with a WCF client/service application can pose a few issues, we will discuss some of them in this blog. I have split up these into two categories: Issues related to Security and those not related to security. Scenario...

Issue: When you run an application that tries to connect to the SQL cluster on Windows 2008 or R2 for distributed transactions, you may get the following error if Incoming Caller Authentication Required is set for MS DTC: "New transaction cannot...

If you migrate your ASP and COM+ application from Windows 2003 to Windows 2008 you may find that your application fails. The possible errors include 800a0005 “Invalid procedure call or argument,” 8004e025 “COM+ Activation failed because an initialization...

One of the reasons why a WCF service may not be responding to requests (in other words hang) might be that we have hit the ServiceThrottle limit for either number of concurrent calls, instances or sessions. http://msdn.microsoft.com/en-us/library/system...

You may run into an issue when running JDBC XA transactions against SQL Server 2008 on Windows Server 2008 or R2 Cluster. The error in the SQL error log is similar to this: Error: 8509, Severity: 16, State: 1 Import of Microsoft Distributed Transaction...

Scenario: WCF service hosted in IIS uses default wsHttpBinding. Clients call WCF service and do not explicitly close the connection(via proxy.close). After 10 connections to the service, client requests appear to hang. Troubleshooting: Capturing a...

Recently we were looking at changing Distributed Transaction Coordinator (DTC)’s log file size and learnt a few things. By default, the Maximum log file size is 64 MB. For general scenarios, one should not need more than that. But if you have a reason...

On my Windows 2008 server, I noticed that whenever I tried to navigate through COM+ explorer, the MMC just kept crashing. When I go COM+ MMC, ‘My Computer’ Properties and clicked on “Default Protocols” tab, MMC crashed. Event log had the error message...

MSDTC communication over the network depends upon RPC. RPC functionality through a firewall requires that specific ports are open to accommodate RPC dynamic port allocation. How to configure RPC dynamic port allocation to work with firewalls describes...

I believe, there are some questions around "Resuse types from referenced assemblies" option under "Add Service Reference" in Visual Studio. Recenty, had the opportunity to invetigate it and he re's what we found: When attempting to generate the client...

Recently, I had the opportunity to work with one of the application developers who was trying to pass the data between child and parent workflows. Objective: Successfully, pass the data between the child and parent workflows. Solution: Please...

Last Summer, I came across an interesting problem on wrokflow versioning. It included versioning for ExternalDataExchange and tracking service. There's a simple fix for workflow and ExternalDataExchange but tracking service versioning issue could be fixed...