XCON: Mail Transfer Slow Across Connectors, Event IDs 3120 and 9316 Appear

• Microsoft Exchange Server, version 5.5

SYMPTOMS

When you administer Microsoft Exchange Server 5.5, you may notice that mail transfer across connectors is extremely slow. Event Viewer may record the following events in the application log:

Event ID: 3120
Source: MSExchangeMTA
Type: Warning
Description: A resource limit has been reached when attempting to open an association. Number of sessions configured: 30

Event ID: 9316
Source: MSExchangeMTA
Type: Warning
Description: An RPC communications error occurred. No data was sent over the RPC connection. Locality table (LTAB) index: x. Windows NT error: 9317.

CAUSE

This behavior can occur when the Message Transfer Agent (MTA) experiences a resource shortage.

RESOLUTION

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

To resolve this behavior, change the 'Concurrent XAPI sessions' value in the registry:

1. Start Registry Editor (Regedt32.exe).



2. Locate the following key in the registry:




HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeMTA\Parameters\  

3. Double-click the Concurrent XAPI Sessions value.



4. Type 50 in the Data box, and then click Hex in the Radix area.



5. Quit Registry Editor.

Additional query words:

Keywords :
Version : winnt:5.5
Platform : winnt
Issue type : kbprb