BizTalk, SAP, WCF ...

Windows Azure Service Bus Queues / Topics - Duplicate Detection

SURESH GIRIRAJAN — Tue, 12 Jul 2011 17:06:26 GMT

I was checking the Windows Azure Appfabric June CTP; I was looking at the Azure Service Bus queues and topics. I noticed something interesting to me and hope we can take advantage of these new capabilities in applications like RFID. Working on BizTalk RFID or any RFID project for that matter, you would have noticed using duplicate tag elimination events during tag processing. For any one new to RFID, when RFID device reads tags it can read the same tag information more than once at a given interval. To avoid the duplicate tag reads we have Duplicate tag removal event in each process. Also using the Service Bus gives bridges the device to on premise applications in async way with greater reliability. So if looked at the Service Bus Queue’s and Topic’s, you can see properties Microsoft.ServiceBus.Messaging -> QueueDescription: DuplicateDetectionHistoryTimeWindow & RequiresDuplicateDetection

Queue accepts duplicate messages: Sent multiple duplicate messages and accepted by the queue.

Queue w/o duplicate messages: Sent multiple duplicate messages and rejected by the queue and the last duplicate message received in last 1 second.

I would to do a write up on my next blog about the duplicate detection and filters on Service Bus Topics…

Centralized Configuration Management for enterprise .Net applications and more...

SURESH GIRIRAJAN — Wed, 06 Jul 2011 03:58:46 GMT

Check out for the first webinar on TeleSharp, an enterprise configuration management tool for .Net applications and more.... Also check out at Tellago Studios and Jesus Rodriguez's blog...

Who should attend this webinar? If you are a .NET Developer/Architect working on enterprise applications, you MUST attend this webinar...

Migrating BizTalk 2006 R2 to BizTalk 2010 XLANGs Issue

SURESH GIRIRAJAN — Tue, 28 Jun 2011 21:29:57 GMT

When we migrate some BizTalk apps from BizTalk 2006 R2 to BizTalk 2010, and we ran into issue when a .net component called inside the orchestration. In the .net component we are trying to retrieve some promoted property and we also checked in the BizTalk group hub to validate it was promoted, no issues there. Only when we try to access the data into the .net component we had issue. We just moved all the assembly what we had in BizTalk 2006 R2 to BizTalk 2010, didn’t recompile anything in BizTalk 2010 environment. But looking further there is couple of new namespace added to the Microsoft.XLANGs… in BizTalk 2010 compared to BizTalk 2006 R2 caused the issue. So all we did to fix the issue is recompile the project in 2010 environment and it worked fine. So it looks like some backward compatibility issue.

public static void Load(XLANGMessage msg)

{

try

{

// get the process id from context.

object ctxVal = msg.GetPropertyValue(typeof(ProcessID));

…

}

BizTalk 2010:

Error Message in the event viewer:

The service instance will remain suspended until administratively resumed or terminated.

If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.

InstanceId: 441d73d3-2e84-49d2-b6bd-7218065b5e1d

Shape name: Bulk Load

ShapeId: bb959e56-9221-48be-a80f-24051196617d

Exception thrown from: segment 1, progress 65

Inner exception: A property cannot be associated with the type 'Tellago.Common.Schemas.ProcessId'.

Exception type: InvalidPropertyTypeException

Source: Microsoft.XLANGs.Engine

Target Site: Microsoft.XLANGs.RuntimeTypes.MessagePropertyDefinition _getMessagePropertyDefinition(System.Type)

The following is a stack trace that identifies the location where the exception occured

at Microsoft.XLANGs.Core.XMessage._getMessagePropertyDefinition(Type propType)

at Microsoft.XLANGs.Core.XMessage.GetContentProperty(Type propType)

at Microsoft.XLANGs.Core.XMessage.GetPropertyValue(Type propType)

at Microsoft.BizTalk.XLANGs.BTXEngine.BTXMessage.GetPropertyValue(Type propType)

at Microsoft.XLANGs.Core.MessageWrapperForUserCode.GetPropertyValue(Type propType)

at Tellago.Common.Components.Load(XLANGMessage msg)

at Tellago.SuspensionProcess.segment1(StopConditions stopOn)

at Microsoft.XLANGs.Core.SegmentScheduler.RunASegment(Segment s, StopConditions stopCond, Exception& exp)

System.Threading.ThreadAbortException executing WCF service

SURESH GIRIRAJAN — Sun, 26 Jun 2011 04:10:05 GMT

In one of our prod server we recently ran into issue when we went and update the web.config and try to browse the service. We started seeing the service was not responding and getting the following warning in the application log. Our service is WCF service, BizTalk orchestration exposed as service. We have other prod server where we never ran into this issue, so what’s different with this server. After going thru lot of forum and came up on some Microsoft service pack and hot fix which related to FCN. But I don’t want to apply any patch on this server then we need to do on all the other servers too. So solution is simple, I dropped the existing website, created a new site with different name with updated web.config browse the service. Then dropped that site and recreate the original web site and it worked fine without any issue.

Event Viewer:

Event Type: Warning

Event Source: ASP.NET 2.0.50727.0

Event Category: Web Event

Event ID: 1309

Date: 6/6/2011

Time: 5:41:42 PM

User: N/A

Computer: PRODP02

Description:

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 6/6/2011 5:41:42 PM

Event time (UTC): 6/6/2011 9:41:42 PM

Event ID: a71769f42b304355a58c482bfec267f2

Event sequence: 3

Event occurrence: 1

Event detail code: 0

Application information:

Application domain: /LM/W3SVC/518296899/ROOT/PortArrivals-2-129518698821558995

Trust level: Full

Application Virtual Path: /TESTSVC

Application Path: D:\inetpub\wwwroot\RFID\TESTSVC\

Machine name: PRODP02

Process information:

Process ID: 8752

Process name: w3wp.exe

Account name: domain\BizTalk_Svc_Hostlso

Exception information:

Exception type: ThreadAbortException

Exception message: Thread was being aborted.

Request information:

Request URL: http://localhost:81/TESTSVC/TESTSVCS.svc

Request path: /TESTSVC/TESTSVCS.svc

User host address: 127.0.0.1

User:

Is authenticated: False

Authentication Type:

Thread account name: domain\BizTalk_Svc_Hostlso

Thread information:

Thread ID: 22

Thread account name: domain\BizTalk_Svc_Hostlso

Is impersonating: False

Stack trace: at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

at System.Web.HttpApplication.ApplicationStepManager.ResumeSteps(Exception error)

at System.Web.HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData)

System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr)

<Description>Handling an exception.</Description>

<AppDomain>/LM/W3SVC/518296899/ROOT/TESTSVC-6-129518741899334691</AppDomain>

<ExceptionType>System.Threading.ThreadAbortException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>

<Message>Thread was being aborted.</Message>

at System.Threading.Monitor.Enter(Object obj)

at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)

at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)

at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.HandleRequest()

at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.BeginRequest()

at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.OnBeginRequest(Object state)

at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.WorkItem.Invoke2()

at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.WorkItem.Invoke()

at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.ProcessCallbacks()

at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.CompletionCallback(Object state)

at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.ScheduledOverlapped.IOCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)

at System.ServiceModel.Diagnostics.Utility.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)

</StackTrace>

<ExceptionString>System.Threading.ThreadAbortException: Thread was being aborted.