[Chilli] net.c: 749: 9 (Bad file descriptor)

[Iacopo Spalletti]

We have a bunch of boxes running coova: on one of them recently coova started  
dropping connections with errors:
coova-chilli[30592]: net.c: 749: 9 (Bad file descriptor) net_write_eth(fd=-1, 
len=54) failed
Stopping and restarting coova temporarely fixes the problem; this happens  
roughly every 12~36 hours.
All the boxes runs on the same OS (Debian Squeeze) and hardware and has the 
same version of coova (1.2.5); the only difference is the affected coova has a 
high-speed connection (100Mibt) on the WAN side, but the traffic is quite low 
(rarely over 6Mbit) and I cannot find any correlation between bandwith usage 
and the problem.
Any advice if it is a software problem or hardware-related?

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Regards
Iacopo Spalletti