A question...cascading failures and failure to recover

[Patrick Morris]

On Fri, 16 Feb 2007, Steven Schwartz wrote:

> I've noticed an odd circumstance on two of my four nagios servers
> lately, and searching has found me no answers. Has anyone experienced
> symptoms similar to these:
> 
> 1) On a given server, a plugin produces a "critical failure" on many
> (sometimes all) of the systems using that particular plugin.
> 
> 2) Tests by hand of said plugin produce an "OK" result.
> 
> 3) The system does not acknowledge the service having recovered until
> checks are rescheduled by force, and then execute OK.
> 
> Does this ring bells with anyone?

There are a lot of circumstances that could cause something like this,
from a bad plugin, to issues with embedded perl, to network issues, to
incorrect file permissions or environment.

There's just not nearly enough info here to have an idea where to start
looking, though.

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