Symptoms
Consider the following scenario:
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You install Microsoft BizTalk 2009 Accelerator for HL7 on a computer that is running Microsoft BizTalk Server 2009.
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You create and deploy a BizTalk Server 2009 application to receive HL7 messages by using a Minimal Lower Layer Protocol (MLLP) receive location.
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BizTalk Server 2009 receives a continuous flow of messages from the MLLP receive location.
In this scenario, the memory usage of the BizTalk Server host instance continues to increase. This behavior may cause host throttling, and may slow down the processing of messages. When host throttling occurs, an event log that resembles the following is logged in the Application log:
Cause
This issue occurs because a component of the MLLP adapter does not release memory.
Resolution
Hotfix information
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Prerequisites
You must have Microsoft BizTalk Server 2009 and Microsoft BizTalk 2009 Accelerator for HL7 installed to apply this hotfix. Additionally, you should have the hotfix installed that is described in the Microsoft Knowledge Base article 973909. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
973909 FIX: Event IDs 5812, 5743, and 5754 are logged when you use BizTalk 2009 Accelerator for HL7 (BTAHL7)
Restart requirement
You do not have to restart the computer after you apply this hotfix. However, you must restart the BizTalk Server host instance after you apply this hotfix. For more information about this procedure, refer to the Readme.txt file that is included in the hotfix package.
Hotfix replacement information
This hotfix does not replace other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Microsoft.solutions.btahl7.mllp.dll |
3.7.509.2 |
108,416 |
10-Mar-2010 |
22:29 |
x86 |
Post-Installation Instruction
Another hotfix is available that fixes a similar issue that may occur in BizTalk Server 2009. We recommend that you install the hotfix that is described in this article together with the hotfix that is described in the Microsoft Knowledge Base article 970492. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
970492 FIX: A BizTalk host instance consumes lots of memory and processes messages very slowly when BizTalk Server 2009 receives lots of HL7 messages
Workaround
To work around this problem temporarily, you can increase the process memory threshold setting, and then restart the host instance when the process memory usage performance counter reaches the process memory threshold. For more information about how to do this, refer to the "More Information" section.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about BizTalk host throttling, visit the following Microsoft Developer Network (MSDN) Web sites:
How BizTalk Server implements host throttling
How to modify the default host throttling settings For more information about BizTalk Server hotfixes, click the following article number to view the article in the Microsoft Knowledge Base:
2003907 Information on BizTalk Server hot fixes
