FIX: Timing Crack Between FD_CONNECT and Call to Shut Down API (186244)


The information in this article applies to:

  • Microsoft Windows NT Server 4.0
  • Microsoft Windows NT Workstation 4.0
This article was previously published under Q186244

SYMPTOMS

When using WSAEventSelect, a call to the shutdown API shortly after receiving a FD_CONNECT notification might fail with WSAENOTCONN.

CAUSE

There is a timing crack between receipt of a FD_CONNECT notification and a subsequent call to the shutdown API where the system reports that the socket is not connected.

RESOLUTION

Use one of the following to work around this problem:
  • Use a blocking call to the connect or WSAConnect API.
  • If you receive WSAENOTCONN when calling the shutdown API, place the call to the shutdown API in a loop with a small delay (few milliseconds).

STATUS

This problem was corrected in Windows 2000.
Modification Type:MajorLast Reviewed:10/29/2003
Keywords:kbAPI kbBug kbfix kbnetwork kbOSWin2000fix kbWinsock KB186244
©2003 Microsoft Corporation. All rights reserved.