[Xymon] DNS test timeout for a downed DNS server.

[Steven Carr]

Check the archives, there is a well documented issue with the DNS timeout
not working as you think it should work (to do with the underlying
libraries).

IIRC some fixes/workarounds have been added to later versions but it wont
be til the next major release (5.?) when the underlying testing tool has
been rewritten that it will be fixed for good.

Steve


On 24 July 2012 21:17, Steve Holmes <sholmes42 at mac.com> wrote:

> Xymon 4.2.3. One of the DNS servers we monitor was down. The bbtest
> total time went from under 30 seconds to over 900 seconds almost all
> of which was for the DNS test.
>
> This caused a number of problems. I removed the dns tag from the down
> server and the time dropped back to the normal level.
>
> The mysteries to me are why did Xymon continue to test the DNS service
> on that server while the conn test was red? Why did it
> take 900 seconds for it to time out, even though I was running with
> --dns-timeout=60? ( I.e. I can understand that it might take longer
> than with the default dns timeout, but not 900 seconds.) The color for
> the dns test for that host was clear and displayed the following text:
>
>
> Service dns on dns.server.org is OK
> Dialup host/service, or test depends on another failed test
> Host appears to be down
>
> Timeout
>
> Seconds: 900.042
>
>
> It also stopped recording data in the graph.
>
> And more importantly, is the behavior still the same in 4.3.9?
>
> Thanks,
> Steve Holmes
> Purdue University
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