Article: Q297534
Product(s): Microsoft Windows NT
Version(s): 4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4,4.0 SP5,4.0 SP6,4.0 SP6a
Operating System(s):
Keyword(s): kbWinNT400PreSP7Fix
Last Modified: 08-MAY-2002
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The information in this article applies to:
- Microsoft Windows NT Server versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4, 4.0 SP5, 4.0 SP6, 4.0 SP6a
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SYMPTOMS
========
When a program uses RPC for socket communication, it may stop working for no
apparent reason. If you quit and start the program again, it works correctly,
but may stop working again. If you check the output of the netstat -n command,
Netstat reports many open connections in a CLOSE_WAIT state with the port that
the program is using. This is a sample of the output from the netstat -n
command:
Active Connections
Proto Local Address Foreign Address State
...
TCP 10.0.0.1:1091 10.0.0.5:1306 CLOSE_WAIT
TCP 10.0.0.1:1091 10.0.0.5:4001 CLOSE_WAIT
TCP 10.0.0.1:1091 10.0.0.5:1500 CLOSE_WAIT
...
CAUSE
=====
This problem occurs because RPC uses a socket that is called a SyncSocket to
optimize data communication. If the Syncsocket is closed incorrectly by the
program that loaded the RPC transport, RPC enters an error loop that it cannot
return from. RPC always assumes that the SyncSocket will always be a valid
socket, and does not have any recovery mechanism to handle situations in which
another function closes the SyncSocket.
RESOLUTION
==========
A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on support costs, please go to the following address on the World
Wide Web:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal support costs will apply to additional
support questions and issues that do not qualify for the specific update in
question.
The English version of this fix should have the following file attributes or
later:
Date Time Size File name Platform
---------------------------------------------------
05/17/2001 04:54p 37,648 Rpcltscm.dll Intel
05/17/2001 04:50p 60,176 Rpcltscm.dll Alpha
NOTE: Because of file dependencies, this hotfix requires Microsoft Windows NT 4.0
Service Pack 6a.
WORKAROUND
==========
To work around this problem, restart the program that is using RPC.
STATUS
======
Microsoft has confirmed this to be a problem in the Microsoft products that are
listed at the beginning of this article.
Additional query words:
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Keywords : kbWinNT400PreSP7Fix
Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400sp6 kbWinNTS400sp5 kbWinNTS400sp4 kbWinNTS400sp3 kbWinNTS400sp2 kbWinNTS400sp1 kbWinNTS400search kbWinNTS400
Version : :4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4,4.0 SP5,4.0 SP6,4.0 SP6a
Hardware : ALPHA x86
Issue type : kbbug
Solution Type : kbfix
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