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# Deadlocks When Using Asynchronous Named Pipes

Article ID: 121822

Article Last Modified on 12/5/2003

APPLIES TO

- Microsoft Windows NT 4.0
- Microsoft SNA Server 2.0, when used with:
  - Microsoft Windows NT 4.0
- Microsoft SNA Server 2.1, when used with:
  - Microsoft Windows NT 4.0

This article was previously published under Q121822

## SYMPTOMS

When Windows NT Workstation and Windows NT Server version 3.5 are stressed by asynchronous named pipes, such as by Microsoft SNA Server for Windows NT, the Windows NT redirector (RDR.SYS) doesn't create enough worker threads fast enough and system deadlock occurs.

## CAUSE

## STATUS

Microsoft has confirmed this to be a problem in Windows NT Workstation and Windows NT Server version 3.5. This problem was corrected in the latest U.S. Service Pack for Windows NT version 3.5. 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

Additional query words: prodnt prodsna

Keywords: kbbug kbfix KB121822