[Xymon] "purple storm" example

[Jon Dustin]

>>> On 5/13/2012 at 10:56 AM, in message <4FAFCBAE.6010809 at hswn.dk>,
Henrik
Størner<henrik at hswn.dk> wrote:
> On 13-05-2012 04:41, Jon Dustin wrote:
>> This evening I had the luck to experience a "purple storm" with
Xymon v4.3.7
> [snip]
>>
>> The xymonnet column for shepherd remained purple until the DNS
servers came 
> back. It almost seemed like Xymon could not "find itself"?
>>
>> Any thoughts on ways to combat this issue?
> 
> What's logged in your xymonnet.log file ?
> 

All I found were the following two entries:

2012-05-12 20:58:14 WARNING: Runtime 481 longer than time limit (300)
2012-05-12 22:07:20 WARNING: Runtime 767 longer than time limit (300)

> Are your network tests and the Xymon website on the same server, or 
> different servers ?
> 

Same server, physical SLES11SP1x64, 16 GiB RAM, not overloaded.

> Do you have a local caching DNS server, or does your resolv.conf
point 
> to remote DNS servers ?

resolv.conf uses two Active Directory name servers, but the majority of
tests go against domains provided by another entity in my University
system. When their DNS servers go south, my Xymon server starts having
troubles.

Also, the TTL for our DNS records is very low (5 minutes I believe).
I'm going to see if we can increase this for our server names.

Thanks for reading.

-- 
 
Jon Dustin - Network Specialist
University of Southern Maine
Portland, ME  207-780-4152