"noconn" configuration feature oddity ...
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 ...
Xymon mailing list Xymon at xymon.com http://lists.xymon.com/mailman/listinfo/xymon
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 ...
Xymon mailing list Xymon at xymon.com http://lists.xymon.com/mailman/listinfo/xymon
Xymon mailing list Xymon at xymon.com http://lists.xymon.com/mailman/listinfo/xymon
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.? CORRECT
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? NONE :-(? (I did look but that's a good consideration)
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. THANKS :-)
cheers ian
participants (3)
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didds3＠yahoo.co.uk
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jeremy＠laidman.org
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ralphmitchell＠gmail.com