FIX: HL7 Interrogative transactions may take 10 or more seconds to complete when MLLP synchronizes communications end-to-end in BizTalk Server 2004 (893369)


The information in this article applies to:

  • Microsoft BizTalk Server Accelerator for HL7

Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

You use the Microsoft BizTalk Server Accelerator for HL7. In HL7 Interrogative transactions where Minimal Lower Layer Protocol (MLLP) synchronizes communications end-to-end through Microsoft BizTalk Server 2004, the transactions may take 10 or more seconds to complete.

For example, this problem may occur when a you send an HL7 QRY message through a BizTalk Server request-response receive port and then you have the message sent out through a static solicit-response send port. For example, the HL7 QRY message may be ADR. The expected result of the QRY request may take 10 or more seconds to return.

CAUSE

This problem occurs because the timeout setting for the MLLP adapter is not adjustable for an asynchronous call of messages to the BizTalk Server MessageBox database. By default, the timeout value is 10,000 milliseconds.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any 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 tool in Control Panel.
   Date         Time   Version    Size    File name
   --------------------------------------------------------------------------
   01-Feb-2005  20:30  1.0.308.0  94,208  Microsoft.solutions.btahl7.mllp.dll

STATUS

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

MORE INFORMATION

This hotfix introduces a new registry entry that controls the MLLP send adapter timeout. Therefore, after you have installed the hotfix, you must add the following registry entry and then set its value:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\BizTalk Accelerator for HL7\Version 1.0\MLLPSendFlushTimeout

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To add the registry entry, follow these steps:
  1. Click Start, click Run, type regedit, and then click OK.
  2. Locate and then click the following registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\BizTalk Accelerator for HL7\Version 1.0

  3. On the Edit menu, click New, and then click DWORD Value.
  4. Type MLLPSendFlushTimeout, and then press ENTER.
  5. Right-click MLLPSendFlushTimeout, and then click Modify.
  6. In the Edit DWORD Value dialog box, click Decimal, type a value between 500 milliseconds and 1000 milliseconds, and then click OK.

    Note By default, the value is 10000 milliseconds. The value that is specified in the registry is a compromise between latency and throughput.
  7. On the File menu, click Exit.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Modification Type:MajorLast Reviewed:5/15/2006
Keywords:kbQFE kbBug kbfix kbprb kbHotfixServer KB893369 kbAudDeveloper kbAudITPRO
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