[Xymon] Spurious purple messages

Colin Coe colin.coe at gmail.com
Tue Sep 8 11:15:36 CEST 2015

Hi Vernon

Thanks for the really good info.  The message serial numbers are
different every day but the messages are sent at the same time (13:45)
daily for all tests on all hosts.

The network is not congested nor is the SAN under any kind of pressure.

Interestingly, trying to do the snapshot report gave me "Cannot create
output directory".

Thanks again


On Tue, Sep 8, 2015 at 3:56 PM, Vernon Everett <everett.vernon at gmail.com> wrote:
> Hi Colin
> What do the client hosts share in common?
> I have seen in the past, a client was overloading their storage system, and
> were overflowing buffers and exceeding the storage array's ability to
> process IO requests. Of course this caused a general disk latency, which
> slowed things down to the point of a purple flood.
> Was no simple solution to that one, except buy more storage, which they did.
> Also, check the "serial numbers" on the messages. Is this a repeat of an
> older message - in which case Xymon might have something fishy going on, or
> are they new messages every day, as in it really thinks there is a problem.
> Xymon only updates pages every 2 and 5 minutes, depending on the page you
> are looking at. Meaning you could wait up to 7 minutes for the real status
> to appear.
> A purple takes 30 minutes to trigger.
> With some unfortunate, and highly improbable timing on whatever is
> triggering these events, it's possible you might not see the purple.
> Have you pulled up a "snapshot report" for the exact time of the messages?
> Something else unlikely, but possible, is the network.
> The conn test used ping, which is UDP
> The Xymon agent sends using TCP.
> Is there anything interesting happening on the network at the time?
> Regards
> Vernon
> On 8 September 2015 at 11:39, Colin Coe <colin.coe at gmail.com> wrote:
>> Hi all
>> Since Friday September 4, I've started receiving "stopped reporting
>> (PURPLE)" messages for all tests on all hosts from one of our Xymon
>> servers.
>> The host status, as shown in the Main View, is green for all hosts and
>> tests.  No purple at all.
>> The "stopped reporting (PURPLE)" messages are being sent at the same
>> time every day, 1:45PM.
>> Any advise on how I should track this down?
>> Thanks
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> --
> "Accept the challenges so that you can feel the exhilaration of victory"
> - General George Patton

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