WFWG/LAN Manager Race Condition Problem (98427)
The information in this article applies to:
- Microsoft LAN Manager 2.1
- Microsoft LAN Manager 2.1a
- Microsoft LAN Manager 2.2
This article was previously published under Q98427 SUMMARY
If a Windows for Workgroups workstation opens a file on a LAN Manager
server and then closes it, the workstation may not immediately send the
Close Server Message Block (SMB). WFWG sends the Close SMB asynchronously:
it returns immediately to the calling program (which closed the file)
without checking whether the close succeeded or failed.
This "overlapping" can cause a problem if the WFWG machine immediately
tries to reopen the same file. The LAN Manager server may process the
reopen before it processes the close, or the WFWG machine may send the
open and close in reverse order. If either of these conditions occurs, the
LAN Manager server sees that the client is attempting to open a file that
is already open, and sends a "sharing violation" to the client.
Microsoft is researching this problem and will post new information here
in the Microsoft Knowledge Base as it becomes available.
| Modification Type: | Major | Last Reviewed: | 9/30/2003 |
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| Keywords: | KB98427 |
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