No output returned from plugin

[Stuart Browne]

> -----Original Message-----
> From: Alexander Haas [mailto:alex at geloet.de]
> Subject: [Nagios-users] No output returned from plugin
> 
> Hi list,
> 
> it's me again :)
> 
> I wrote a plug-in which does work great. It works from the shell as
> root, from the shell as nagios and from nagios executed as plug-in.
> 
> The only problem is when there is an error returned. It does not work
> when i execute it from nagios as a plug-in and there is an error (=>
> return code != 0). Every time my plug-in returns anything but zero,
> Nagios tells me that there is "No output returned from plugin". It does
> not matter if my script does output its error message on STDOUT or
> STDERR. Of cause there is an error message visible when I execute my
> plug-in from a shell.

Nagios doesn't capture anything sent to STDERR, so make sure it is sending its output to STDOUT.  Also make sure that the first line returned when an error occurs is not an empty line; an empty line is considered "No output".

Perhaps you'd like to run the plugin (as nagios) when it is erroring and show us the output? 


> I guess there is an easy explanation?
> 
> Thank you very much,
> 
> Alex

Stuart

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