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> Question 2)
>  110515 11:47:32 11957 XrootdXeq: usatlas1.12016:[log in to unmask] login
>  110515 11:47:32 11957 usatlas1.12016:[log in to unmask] XrootdProtocol: 
> endsess 11955:61.163901
>  110515 11:47:32 11957 usatlas1.12016:[log in to unmask] XrootdProtocol: 
> endsess 11955:61.163901 rc=-3 (No such process)
>  110515 11:47:32 11957 usatlas1.12016:[log in to unmask] XrootdResponse: 
> sending err 3011: session not found
> Is this "session not found" the cause of the failures?

>>   This is a request to end a session that apparently does not
>>exist... I will have a closer look.
Actually, this is a bug on the client's part. As far as I remember it seems 
to have been introduced about Summer 2010. The client is supposed to keep 
track of the last session it had to a server. When it disconnects and then 
reconnects it is supposed to try to cancel that last session. The error 
recovery action corrects duplicate session problems involving held locks and 
open files. Since last summer it appears that the client always sends an end 
session request whether or not there actually was a previous session. 
Annoying but not fatal.

Andy