[THIN] Re: TS file locks
- From: "Carl Stalhood" <cstalhood@xxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Mon, 13 Jan 2003 20:12:09 -0600
What about this? The hotfix is linked in the article.
http://support.microsoft.com/default.aspx?scid=kb;en-us;272582
Windows 2000 Terminal Services Incorrectly Closes Files on Remote Shares
The information in this article applies to:
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
This article was previously published under Q272582
SYMPTOMS
You may receive one or more of the following error messages when
multiple users on a Terminal Server work with the same files that are
located on a network share:
Disk or Network Error STATUS_UNEXPECTED_NETWORK_ERROR (0xc00000c4)
ERROR_UNEXP_NET_ERR (error 59 in decimal or 0x3b in hexadecimal)
STATUS_CONNECTION_DISCONNECTED (0xc000020c) ERROR_NETNAME_DELETED (error
64 in decimal or 0x40 in hexadecimal)
CAUSE
This problem can be caused when the user that first opened the shared
file logs off. The Terminal Server incorrectly closes the file handles
that it has open to the remote file, so any other programs that had the
file open are no longer able to access the file. Note that this problem
does not occur if the data files are moved to a local volume on the
Terminal Server.
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows
2000. For additional information, click the following article number to
view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The following file is available for download from the Microsoft Download
Center:
Q272582_W2K_SP3_X86_EN.exe
The Q272582_W2K_SP3_X86_EN.exe file contains the following files:
Mrxsmb.sys
Rdbss.sys
For additional information about how to download Microsoft Support
files, click the following article number to view the article in the
Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current
virus-detection software that was available on the date that the file
was posted. The file is stored on secure servers that prevent any
unauthorized changes to the file.
NOTE: This hotfix addresses scenarios where data files reside on network
shares. Executable images must run from a local partition.
WORKAROUND
To work around this problem, move the data files to a local volume on
the Terminal Server. If hard-coded drive letters are required by your
program, you can use the SUBST command to map these drive letters to a
local volume.
STATUS
Microsoft has confirmed that this is a problem in Windows 2000. This
problem was first corrected in Windows 2000 Service Pack 3.
MORE INFORMATION
The best way to identify this problem is to look at a trace. In the
trace you can see that the Terminal Server initially sends an SMB Close
for the file handle of the file that is being used by user A. This
happens when the user quits the program. When user A then logs off, the
Terminal Server sends an SMB Close for any other file handles that are
outstanding on this file that was in use by user A, even if those file
handles were not obtained by user A. For example, you might see the
following behavior in the trace if multiple users were working with a
Microsoft Access database file:
User A quits Access. SMB Close for the file handle for the database
file.
User A logs off. SMB close for the file handle that user B obtained to
open the database file.
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Paul Beckman
Sent: Monday, January 13, 2003 4:26 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] TS file locks
has anybody heard of this? and if so what is the work around? We are
seeing this happen. Does anyone else run a .exe on the citrix server
and the working dir. on a file srever?
When a Terminal Services
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client connects to a network device, the Windows network redirector
component creates a file control block (FCB) that handles the state of
open files. When multiple users running Terminal Services sessions
connect to the same network resource, a bug in Win2K prevents the
network redirector from creating more than one FCB. As a result, when
one user disconnects, the OS closes the FCB, which terminates all other
remaining user connections.
If the remaining users were accessing data on the network resource, they
will receive the following error message:
Disk or Network Error
If the remaining users were running a program on the network resource,
the application might exit or display the following error message:
C0000006 : In Page I/O Error
Microsoft currently has no fix for this problem, although the same error
doesn't exist in Windows .NET
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Server (Win.NET Server). Microsoft recommends that Win2K users copy all
network resources to the local machine, then then use the Subst command
to create a dummy drive letter that points to the local path. However,
the whole point of creating network resources is to be able to share
those resources, and I doubt most users will follow Microsoft's
recommendation.
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