I have been running FreeRadius for about 2 weeks now in a limited live trial 
without any problems until today.  The system was handling  about 5000-8000 
requests per day, but suddenly I started getting the dreaded 'Dropping 
duplicate authentication packet' message in the logs.  At the same time 
authentication became intermittent, the server only responding to some auth 
requests and ignoring others.  It also appears that the system was using a 
large number of threads at the time.  Looking at the list archives I see 
that this problem has been reported before, but without any real resolution, 
possibly because it is so difficult to reproduce.

Unfortunately I could not get any diagnostic details from the server when 
this happened as it was in a live environment. It did disappear however 
after stopping and restarting radiusd.

I think this is a very serious problem that needs to be resolved urgently.  
I suspect that this is caused by some race condition that only manifests 
itself under very rare conditions.

BTW at the time I was running the Nov 8 snapshot, authentication from file 
and accounting to mySQL.

Thanks,
Dieter

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