[Xymon] semop failed, Invalid argument

John Horne john.horne at plymouth.ac.uk
Tue Nov 12 20:22:19 CET 2019

On Tue, 2019-11-12 at 17:03 +0000, Rothlisberger, John R. via Xymon wrote:
> Does anyone have any helpful ideas?
> 2019-11-01 11:45:07.083973 semop failed, Invalid argument
> 2019-11-01 11:45:07.083982 Dropping message due to semaphore error
Not really I'm afraid.

The actual error is the invalid argument bit. It refers to a call to 'semop'. A
very quick look at the xymond code seems to indicate that it would be the
semaphore id that it is objecting to - basically it doesn't exist or the id is
less than zero.

How that came about though, I have no idea. It may be that the code is being
called when it shouldn't be - perhaps a lack of argument checking. It would
require much further checking of the code to see what is happening. Maybe
running xymond is debug mode will give more information.


John Horne | Senior Operations Analyst | Technology and Information Services
University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK

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