Frequent timeout

Alex mysqlstudent at
Tue Sep 11 18:56:58 UTC 2018


On Tue, Sep 11, 2018 at 2:47 PM John W. Blue < at> wrote:
> If you use wireshark to slice n dice the pcap .. "dns.flags.rcode == 2" shows all of your SERVFAIL happens on localhost.
> If you switch to " ==" every single query is localhost.
> Unless you have another NIC that you are sending traffic over this does not look like a bandwidth issue at this particular point in time.

Thanks so much. I think I also may have confused things by suggesting
it was related to bandwidth or utilization. I see it also happen now
more regularly too.

Can you ascertain why it is reporting these SERVFAILs?

The queries are on localhost because /etc/resolv.conf lists localhost
as the nameserver. Is that why we can't diagnose this? This most
recent packet trace was started with "-i any". Why would the ones on
localhost be the ones which are failing? I'm assuming postfix and/or
some other process is querying bind on localhost to cause these

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