[pkg-fetchmail-maint] Bug#321922: fetchmail: DNS temporarily failure after suspend to disk

[Wolfgang Kohnen]

Nico Golde schrieb:

>Hi,
>* Wolfgang Kohnen <wollie at lis.bremen.de> [2005-08-08 11:52]:
>  
>
>>sorry if this is a known bug, BTS seems to be down or something...
>>
>>After hibernating my notebook with software suspend v2 to disk for a
>>while (say 10 hours), fetchmail can'T resolve servers' hostnames and
>>comlains about temporarily DNS errors. A restart of the fetchmail daemon
>>fixes this behaviour.
>>    
>>
>
>[...] 
>All the other programs are able to do this?
>Regards Nico
>  
>

Hmm, I think I should give more background info: I use a patched 2.6
kernel with software suspend to disk. The suspend script shuts down my
ehternet device before stopping all processes and then goes into suspend
state. After resuming and continuing the processes (there is a SIGCONT
signal I think) the suspend script itself resumes and brings up the
ethernet device again. Since I use dhcp for my eth0, the network
environment changes sometimes, i.e. different address, different default
gateway, different nameserver entry in resolv.conf and so on.

So IMHO there are three possible pitfalls: The long suspend time which
creates a huge jump into the future from fetchmails point of view and
maybe something like a timer get confused. The "sudden" change of
network. The time between SIGCONT and net reestablishment. Just my two,
no, three cents. :-)

Hope it helps reproducing or understanding the problem.

Greets,
Wollie
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