[Xymon] Parsing problems with client reports

Japheth Cleaver cleaver at terabithia.org
Wed Dec 14 22:46:11 CET 2016

That's strange...
If anything, those switches should cause any hidden bugs with memory 
handling to be more quickly exposed, even to the point of aborting.

Have you noticed any free/alloc issues in xymond.log, or any other 
altered behavior since bouncing it?


On 12/14/2016 7:48 AM, Scot Kreienkamp wrote:
> Not sure what those switches do but the xymon server has been much 
> quieter since they were applied.
> *Scot Kreienkamp  | Senior Systems Engineer | La-Z-Boy Corporate*
> One La-Z-Boy Drive | Monroe, Michigan 48162 | Office: 734-384-6403 | | 
> Mobile: 7349151444 | Email: Scot.Kreienkamp at la-z-boy.com
> *From:*Xymon [mailto:xymon-bounces at xymon.com] *On Behalf Of *Japheth 
> Cleaver
> *Sent:* Tuesday, December 13, 2016 12:00 PM
> *To:* xymon at xymon.com
> *Subject:* Re: [Xymon] Parsing problems with client reports
> On 12/13/2016 7:01 AM, Scot Kreienkamp wrote:
>     Hello list,
>     Has anyone been working on the problem where reports from clients
>     are getting confused on the server?  I am getting multiple false
>     alerts daily now where it will turn back to green at the next
>     test, and when I go to look at the test in xymon it’s because it’s
>     only got partial information.  In multiple instances now I’ve been
>     able to see the report from another client, in part or in full, in
>     one clients page.  In the most recent incident last week I could
>     see the beginning client line from another windows client report
>     halfway down in the ports test for a Linux client.
>     All the false reports are really damaging the trust we place in
>     Xymon to monitor our systems, and people are starting to just
>     delete the warning emails without looking at them because we get
>     so many false reports now.
>     Thanks
>     *Scot Kreienkamp | Senior Systems Engineer | La-Z-Boy Corporate*
>     One La-Z-Boy Drive | Monroe, Michigan 48162  |( 734-384-6403 | |
>     )7349151444| *Scot.Kreienkamp at la-z-boy.com <mailto:%7BE-mail%7D>
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> Can you enable MALLOC_PERTURB_=1 and *MALLOC_CHECK_=3***in the xymon 
> environment? I've noticed this occasionally in the past and added 
> debugging logic, but I wasn't able to reliably duplicate it. I noticed 
> that it did seem to happen more often when the server was under memory 
> pressure and didn't seem to be related to truncated (or garbled) 
> incoming TCP connections.
> Also, what version and distro?
> -jc
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