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Article ID: 2627579 - Last Review: December 21, 2011 - Revision: 1.0

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SYMPTOMS

Consider the following scenario:
  • You use the Microsoft BizTalk MQSeries Client adapter (MQSC) that is included in Microsoft Host Integration Server.
  • You use the client-based MQSC Adapter Send ports to send messages.

In this scenario, the Send ports may be slow. This problem may be especially serious when messages are sent over high latency networks.

CAUSE

This issue occurs because the MQSC adapter works as single-threaded in Send scenarios. The adapter waits for an Acknowledgment (ACK) packet for the current Send operation before the adapter continues with the next Send operation.

RESOLUTION

Microsoft Host Integration Server 2010

The hotfix that resolves this issue is included in cumulative update package 2 for Host Integration Server 2010.

For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2616519  (http://support.microsoft.com/kb/2616519/ ) Cumulative update package 2 for Host Integration Server 2010

Microsoft Host Integration Server 2009

The hotfix that resolves this issue is included in cumulative update package 2 for Host Integration Server 2009.

For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2645939  (http://support.microsoft.com/kb/2645939/ ) Cumulative update package 2 for Host Integration Server 2009

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

This fix enables you to specify the maximum number of concurrent connections within the MQSC Send Handler properties. The default limit is 10 connections.

APPLIES TO
  • Microsoft BizTalk Adapters for Host Systems
  • Microsoft BizTalk Adapters for Host Systems 2.0
  • Microsoft BizTalk Adapters for Host Systems 2.0 Developer Edition
  • Microsoft BizTalk Server 2009 Branch
  • Microsoft BizTalk Server 2009 Developer
  • Microsoft BizTalk Server 2009 Enterprise
  • Microsoft BizTalk Server 2009 Standard
  • Microsoft BizTalk Server Branch 2010
  • Microsoft BizTalk Server Developer 2010
  • Microsoft BizTalk Server Enterprise 2010
  • Microsoft BizTalk Server Standard 2010
  • Microsoft Host Integration Server 2010
  • Microsoft Host Integration Server 2009
  • Microsoft Host Integration Server 2009 Developer Edition
Keywords: 
kbqfe kbfix kbexpertiseinter kbbug kbsurveynew KB2627579
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