[Xymon] "noconn" configuration feature oddity ...

[Ralph M]

Jeremy,
I think he's saying that a host which starts off like that *never* shows
up, even when it starts generating real status messages.

Ian,
Are there any entries in the ghost list?  Or error messages in the logs
when the real status messages start coming in and get dropped/ignored?

The good news is, I just tried to reproduce that behaviour in 4.3.30, and
the host shows up just fine.  So, I assume whatever goes wrong is fixed
somewhere later than 4.3.17.

Ralph Mitchell



On Mon, Oct 5, 2020 at 7:44 PM Jeremy Laidman <jeremy at laidman.org> wrote:

> Ian
>
> An interesting discovery indeed. Although I'm not greatly surprised. A
> host that has no tests and has never had any test results, is not a
> particularly interesting one, and is rather like a tree falling in an
> uninhabited forest, where nobody knows - or even cares - about the state of
> the tree. I'd attribute this phenomenon to the type of "undefined
> behaviour" that can occur when any process is asked to do something it
> wasn't designed to do and which, in essence, makes no sense.
>
> Unless I'm missing something.
>
> Cheers
> Jeremy
>
>
> On Mon, 5 Oct 2020 at 23:33, Ian Diddams via Xymon <xymon at xymon.com>
> wrote:
>
>>
>>
>>
>> ---------- Forwarded message ----------
>> From: Ian Diddams <didds3 at yahoo.co.uk>
>> To: "xymon at xymon.com" <xymon at xymon.com>
>> Cc:
>> Bcc:
>> Date: Mon, 5 Oct 2020 11:53:01 +0000 (UTC)
>> Subject: "noconn" configuration feature oddity ...
>> A colleague and I noticed a feature of xymon last week, and tested it
>> across a few version from 4.3.12 to 4.3.17   [ upgrading etc etc is not a
>> trivial matter in these environments so its meaningless to just suggest
>> "upgrade asap" - although see [1] for general feedback etc ].
>>
>> If a new host is added to hosts.cfg with a noconn configuration in a new
>> group or page configuratiopn
>>
>> eg
>>
>>
>> page test Test
>> group-compress <H3>Test</H3>
>> 4.5.6.7 test #  noconn
>>
>> that server NEVER appears in the webpage as expected, although the new
>> group does appear albeit then empty
>>
>> If it is introduced without that noconn parementer then it does as
>> expected appear.  Then adding noconn to it subsequently does indeed drop
>> the conn column and reproting then continues as normal.
>>
>>
>> We have also found that specifying noping instead of noconn does include
>> the server in the webpage with a white face in the conn column - ie it does
>> get included, so is maybe a work round  at least)
>>
>> However...
>>
>> adding
>>
>> 4.5.6.7 test #  noconn
>>
>> to an already existing group/page - that server DOES get listed but with
>> no subsequent tests against it - the line remains empty
>>
>> This would appear to be a feature of xymon Ive not come accrioss in 9+
>> years of using it.
>>
>> [1] Anybody found any other "fixes" to be ablwe to sepcify noconn from
>> the outset?
>>
>> I've googled but nothing appears to match that - though that could just
>> be my rubbish googling skills...
>>
>>
>> UPDATE:  deeper wierdness...  if i add a eg ssh test to that hosts.cfg
>> line ...  then the server DOES get added...
>>
>> cheers
>>
>> ian
>>
>>
>>
>>
>>
>>
>>
>> ---------- Forwarded message ----------
>> From: Ian Diddams via Xymon <xymon at xymon.com>
>> To: "xymon at xymon.com" <xymon at xymon.com>
>> Cc:
>> Bcc:
>> Date: Mon, 5 Oct 2020 11:53:01 +0000 (UTC)
>> Subject: [Xymon] "noconn" configuration feature oddity ...
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