SLI Verbs Return w/ Cancelled Error Before SLI_CLOSE Completes

• Microsoft SNA Server for Windows NT, versions 2.11, 2.11 Service Pack 1 (SP1), and 3.0

SYMPTOMS

If a session failure occurs on an SLI session, any pending SLI_BID request will return immediately with an error. If the SLI application then calls SLI_CLOSE followed immediately by SLI_OPEN, the SLI_OPEN will fail with an LUA_CANCELLED error.

CAUSE

While an SLI_CLOSE is being processed, an SLI_OPEN is being accepted and returns with an error before the SLI_CLOSE completes. The problem occurs since the underlying RUI interface has not completed session cleanup on the previous session failure.

RESOLUTION

An update to Winsli32.dll corrects this problem by changing the handling of the SLI_CLOSE function. When an application issues SLI_CLOSE, all the pending SLI verbs are cancelled. This fix changes the order of processing so that all pending verbs are not returned until the SLI_CLOSE completes.

STATUS

Microsoft has confirmed this to be a problem in SNA Server versions 2.1, 2.11, 2.11 Service Pack 1 (SP1), and 3.0. This problem was corrected in the latest Microsoft SNA Server 2.11 and 3.0 U.S. Service Packs. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

   S E R V P A C K