[Bug 991308] Re: Dnsmasq fails to resolve if any upstream nameserver is unreachable

[Thomas Hood]

Returning to this issue....

Consider the log in comment #10.  A successful lookup is done.

> Jun 22 13:43:09 archon dnsmasq[9635]: query[A] slashdot.org from 127.0.0.1
> Jun 22 13:43:09 archon dnsmasq[9635]: forwarded slashdot.org to 75.75.75.75
> Jun 22 13:43:09 archon dnsmasq[9635]: reply slashdot.org is 216.34.181.45

Later an unsuccessful one is done.

> Jun 22 13:46:00 archon dnsmasq[9814]: query[A] gmail.com from 127.0.0.1
> Jun 22 13:46:00 archon dnsmasq[9814]: forwarded gmail.com to 75.75.75.75
> Jun 22 13:46:00 archon dnsmasq[9814]: forwarded gmail.com to 75.75.76.76

It looks as if *both* nameservers are failing to respond in the latter
case.

It was originally reported that one out of four queries fails.  This is
the failure frequency one would get if each nameserver failed half the
time and the servers fail independently of each other.  William reported
in comment #6 that one of the nameservers, 75.75.76.76, fails half the
time.  Is it possible that the other nameserver is also failing half the
time?

More generally, William, have you learned anything new about the problem
in the past month and a half?


** Changed in: dnsmasq (Ubuntu)
       Status: Confirmed => Incomplete

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Title:
  Dnsmasq fails to resolve if any upstream nameserver is unreachable

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