FIX: The BizTalk Server 2004 FTP send adapter may send duplicate messages when you configure two FTP send ports to use the same BTS.ReceivePortName filter

When you configure two FTP send ports to use the same BTS.ReceivePortName filter in Microsoft BizTalk Server 2004, the FTP send adapter may send duplicate messages.

This problem occurs if the following conditions are true:

�	The transmission from one FTP send port fails.
�	The FTP send ports are configured to retry the transmission 0 times.
�	The Btsntsvc.exe service is restarted.

Hotfix information

A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

You must have Microsoft BizTalk Server 2004 Service Pack 1 installed to apply this hotfix.

Restart requirement

You do not have to restart the 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
   --------------------------------------------------------------------------
   10-Jun-2005  17:35  3.0.6132.0  122,880  Microsoft.BizTalk.CoreAdapter.dll

Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.

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

The FTP send adapter processes messages in one batch. When the message processing has completed, the FTP adapter notifies the End Point Manager (EPM) of the transmission status.

If one transmission from an FTP send port succeeds, the FTP send adapter instructs the EPM to delete that message from the MessageBox database. If a transmission from an FTP port fails, the FTP send adapter instructs the EPM to use the backup transport. Because EPM batch processing is atomic, the operation fails if there is no backup transport configured. Therefore, the message that was delivered successfully is not deleted. The message remains in the MessageBox and has a status of "Delivered Not Consumed." When the Btsntsvc.exe service is restarted, the FTP adapter is instructed to deliver the message again.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: