Lookback period issue regression in 1.4

[weveland]

Sorry for the clickbaity style title. But It looks like the lookback period issue I reported with the previous release may have returned. After upgrading to 1.4 I'm getting alerts for checks with lengthy lookback periods. I can view the alert in the dashboard and visually see the results. But the return is 0 events, hence the alarm.

--
Wayne

[weveland]

Ok deactivating and reactivating the alert got it working properly. So my initial assessment may have been incorrect. Any ideas what could have happened here?

[rkennedy]

Something may have changed with the configuration, are you seeing any alerts anymore or is it functioning as expected?

[weveland]

It seems to be fine at the moment.

[jolson]

Any ideas what could have happened here?

Not sure - is it possible that your single alert has been misbehaving since before the fix was put in place? The following fix was implemented:
Fixed alert run end time slight offset on slow systems

The above bug was caused to to an inconsistency in the time that alerts were scheduled to run, and when they actually ran. There is a potential that the alert could miss some time, which may result in a missed alert here and there - credit to @Jklre for pointing this out.

After the alert subsystem was upgraded, something must have happened to cause your alerts to regress as they did - have you noticed any sort of inconsistency since making this post?

[weveland]

Not so far. Before disabling and re-enabling the alert I did try manually running it a few times, so maybe it was modified in the config files. Then when I deactivated and re-activated it, it was pulled from the database and put down correctly.

That's my line of thought.

[hsmith]

Let's monitor it for a couple of days to see if it comes back.

[weveland]

Unfortunately same issue again this morning. Alert fired at a slightly different time this morning.

Yesterday: 6:31 AM
Had to deactivate and reactivate alarm to clear and return OK.

Today: 6:54 AM
Just had to re-run check manually and alarm returned OK.

[hsmith]

How long are your check intervals/lookback set to? I want to test this on my end.

[weveland]

Checks run every 5 minutes. Lookback period is 5 hours.

As a side note. I didn't get an alarm this morning