[Xymon] Flapping Status? What does it mean?

[Jeremy Laidman]

On 16 October 2014 10:35, Maik Heinelt <maik at vegasystems.com> wrote:

> We recently migrated our Hobbit 4.2 server to Xymon 4.3.18.
> For some some clients, I noticed a warning "Xymon WARNING: Flapping
> status".
> What is flapping status?


A flapping status is set when Xymon detects that a test for one server goes
into and out of a normal state too often.  Rather than logging hundreds of
red/green/red/green events, it correlates them together into a "flapping"
state for a while.

The default flap count threshold is 5, and the default flap-seconds
threshold is 30 minutes.  That means if a test flip/flops more than 5 times
in 30 seconds or less, the test will go into a flapping state.

More information about flapping detection and behaviour is in the xymond(8)
man page.  Here's a link:

http://xymon.sourceforge.net/xymon/help/manpages/man8/xymond.8.html


> how to avoid, but not disable it?
>

You have a few options:
1) fix the service or test so that it doesn't go red
2) increase values for flap-seconds and flap-count by adding the relevant
arguments to the xymond execution (in the [xymond] section of tasks.cfg)
3) use the delay-red option for xymond (in tasks.cfg), or set delayred or
delayyellow for the host (in hosts.cfg)

More information about the delayred setting in hosts.cfg is in the
hosts.cfg(5) man page.  Here's a link:

http://xymon.sourceforge.net/xymon/help/manpages/man5/hosts.cfg.5.html

Cheers
Jeremy
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