bind 8.2.2-p5 ns_req errors with connection refused.

[Kevin Darcy]

foo at foobar.org wrote:

> Hey, all.
>
> I keep getting ns_req connection refused messages like:
>
> messages.Dec1899.gz:Dec 17 17:18:36 www5 named[5484]: ns_req:
> sendto([192.168.254.192].2653): Connection refused
> messages.Dec1899.gz:Dec 17 17:18:36 www5 named[5484]: ns_req:
> sendto([192.168.254.209].1489): Connection refused
> messages.Dec1899.gz:Dec 17 17:18:36 www5 named[5484]: ns_req:
> sendto([192.168.253.244].1829): Connection refused
>
> My version of bind is 8.2.2-p5 and it works fine, but at times (at what
> seems to be random times) I will  get this error message and the DNS
> server doesn't respond.
>
> The only way I have found to fix it is to send a HUP to the named or
> wait an undetermined amount of time for it to work again (it's
> undetermined, because I send a HUP as more then 5 minutes and management
> would be on my tail)
>
> So any insight of why the DNS server is stalling would be appreciated.

Sorry I can't offer anything specific, but this looks more like a system
problem than a BIND bug. sendto() is a fairly low-level networking routine,
and "Connection refused" is something the networking stack returns. Perhaps
you are exhausting some sort of resource on the machine, which goes away
temporarily when you reload named (?). How does the machine look otherwise?


- Kevin