Large Com.cfg File May Cause Dynamic Updates to Fail

• Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2

SYMPTOMS

LUs that are added to pools by means of the SNA Manager may not be dynamically picked up by clients if the SNA Server configuration file is very large. The following error message is displayed when a client attempts to open a session:

No LU in LU Group Free.

CAUSE

The problem is caused when the dynamic updates time out while they are waiting for a response. This problem can occur when you save a very large SNA Server configuration file (such as Com.cfg) as it will generate a large number of dynamic status updates. This problem occurred on a customer configuration that had 56,000 objects and a Com.cfg file size of 7 MB.

RESOLUTION

To resolve this problem, obtain the latest service pack for SNA Server version 4.0. For additional information, please see the following article in the Microsoft Knowledge Base:

Q215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

WORKAROUND

Restarting the SNA Service resolves the problem.

STATUS

Microsoft has confirmed this to be a problem in Microsoft SNA Server version 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2. This problem was first corrected in SNA Server version 4.0 Service Pack 3.

Additional query words:

Keywords : sna4sp3fix sna3 sna3sp1 sna3sp2 sna3sp3 sna4 sna4sp1 sna4sp2
Version : WINDOWS:3.0,3.0 SP1,3.0 SP2,3.0 SP3,3.0 SP4,4.0,4.0 SP1,4.0 SP2
Platform : WINDOWS
Issue type : kbbug