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RE: [Condor-users] Restarting comms with XP nodes (SP2 UDP bugette)

On Wed, 22 Jun 2005, Bryan S. Maher wrote:

Can you provide any details on this MS patch?  As you point out, the
problem occurs on non-SP2 machines as well so I'm curious what the root
cause of the problem is.

I don't know if this is the patch in question, but there is currently a hotfix for Windows XP *and* Windows Server 2003 incorrectly calculating the IP checksum on large UDP broadcast packets. This issue affects Windows XP SP1 and Windows XP SP2 as well as Windows Server 2003 (I don't know whether it affects Windows XP with no Service Pack applied). See Knowledge Base Article 824838:


Last week Microsoft released an update to a Security Bulletin MS05-019 (see:


) which fixes a problem in the TCP/IP stack introduced by an earlier version of the security update supplied with that Security Bulletin and also by Windows Server 2003 Service Pack 1. This may or may not be relevant to the problems people have been experiencing with Condor under Windows; I don't know. Whether this version of the security update incorporates the hotfix mentioned above is anybody's guess. For a description of the problem caused by the earlier version of the security update see Knowledge Base Article 898060:


...and for a description of issues with the just released version of the security update, see Microsoft Knowledge Base Article 893066:


Hope that is of some use to someone....

	-- Bruce

Bruce Beckles,
e-Science Specialist,
University of Cambridge Computing Service.