[Xymon] xymon hostdata module going rogue

[J.C. Cleaver]

On Fri, August 28, 2015 3:16 pm, John Thurston wrote:
> On 8/28/2015 12:45 PM, John Thurston wrote:
>> On 6/10/2015 9:01 AM, Scot Kreienkamp wrote:
>>> Hi everyone,
>>>
>>> I have a xymon server running 4.3.21 that seems to be accumulating
>>> processes like these:
>>>
>>> hobbit   28430  0.0  0.0      0     0 ?        Z    12:50   0:00
>>> [xymond_hostdata] <defunct>
>>>
>>> hobbit   28435  0.0  0.0      0     0 ?        Z    12:50   0:00
>>> [xymond_hostdata] <defunct>
>>>
>>> hobbit   28440  0.0  0.0      0     0 ?        Z    12:50   0:00
>>> [xymond_hostdata] <defunct>
>>>
>>> hobbit   28444  0.0  0.0      0     0 ?        Z    12:50   0:00
>>> [xymond_hostdata] <defunct>
>>>
>>> hobbit   28449  0.0  0.0      0     0 ?        Z    12:50   0:00
>>> [xymond_hostdata] <defunct>
>>>
>>> hobbit   28452  0.0  0.0      0     0 ?        Z    12:50   0:00
>>> [xymond_hostdata] <defunct>
>>>
>>> It seemed related to drop messages . . .
>>
>> Hey, I think I'm seeing the same thing on Solaris with 4.3.21
>>
>> I've ended up here after a customer let me know that email alerts were
>> not working as expected. After a few hours of digging around, I decided
>> that the alert daemon was failing to retrieve hostnames and failing
>> miserably.
>>
>> Have other people seen this behavior?
>
> I have duplicated this behavior on another xymon server on Solaris. It
> certainly looks like this behavior breaks the alert daemon. Fortunately,
> I "drop" hosts in batches so can restart Xymon at that time, but this is
> still pretty icky.
>
> J.C., do you know if your patch made it into the code-base?
>
> Has anyone else tested this patch? If so, on what operating systems?
>
> --


I thought this had sounded familiar.

The patch from
http://lists.xymon.com/pipermail/xymon/2015-June/041833.html was checked
in in https://sourceforge.net/p/xymon/code/7669/ , however it's not in the
most recent Terabithia RPM.

If you could test the direct patch (for hostdata, at
http://lists.xymon.com/pipermail/xymon/attachments/20150610/8b425efb/attachment.obj
) on your OS, that would be very helpful. Signal handling is always a bit
tricky to ensure is correct across the board.


Regards,

-jc