Multiple SLI_OPEN()s Can Cause SESSION_ALREADY_OPEN (150513)
The information in this article applies to:
- Microsoft SNA Server 2.0, when used with:
- the operating system: Microsoft Windows NT
- Microsoft SNA Server 2.1, when used with:
- the operating system: Microsoft Windows NT
- Microsoft SNA Server 2.11, when used with:
- the operating system: Microsoft Windows NT
- Microsoft SNA Server 2.11 SP1, when used with:
- the operating system: Microsoft Windows NT
This article was previously published under Q150513 SYMPTOMS
When a multi-threaded LUA application issues more than one SLI_OPEN()
before the first SLI_OPEN() returns, the result is the following:
SLI_OPEN response
UNSUCCESSFUL - SESSION_ALREADY_OPEN
primary return code: 0014 (LUA_UNSUCCESSFUL)
secondary return code: 00000035 (LUA_SESSION_ALREADY_OPEN)
This SLI_OPEN response will contain an LUA_luname that had not been
opened using an SLI_OPEN().
NOTE: The LUA_luname field is part of the VCB (verb control block) for the
SLI_OPEN() and is explained in the SNA Server [ASCII 147]Programmer's Reference[ASCII 148] on
page 88.
CAUSE
There is a problem in the SNA Server SLI library's algorithm to match up an
SLI application VCB with its owning session control block. This can cause
the SLI library to complete the wrong SLI call if two SLI_OPENs are pending
at the same time.
RESOLUTION
A update to the SNA Server SLI interface corrects this problem by properly
matching the SLI application's verb control block with the correct session
control block.
STATUS
Microsoft has confirmed this to be a problem in Microsoft SNA Server
versions 2.0, 2.10, 2.11, and 2.11.sp1.
This problem was corrected in the latest Microsoft SNA Server 2.11 U.S.
Service Pack. For information on obtaining the service pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):
| Modification Type: | Major | Last Reviewed: | 11/26/2003 |
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| Keywords: | kbbug kbenv kbfix KB150513 |
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