I have an alert defined which should send an email if a search returns no results for a 5 minute time period.
Alert Type: Real-time.
Trigger Condition: Number of Results is < 1 in 5 minutes.
Permissions: Shared in App.
The search string is something like this:
host="production*" AND (uri_path="/web/foo" OR uri_path="/web/bar")
This is sending repeated emails, even though there have not been any 5 minute periods where the search returns 0 results.
Clicking on the "view results" link shows a 5 minute period and supposedly shows no results, but clicking on the magnifying glass to perform the search again shows that there are results for the same period.
What is going on here?
Also, clicking on "alert" link from the alert emails shows the alert definition along with " There are no fired events for this alert."
I've seen this same question come up a couple times, and my solution is different, so thought I'd share on a few of these in case others have the same problem I did.
The problem was that the query in my Alert was "search index=myindex sourcetype=waf httpstatus=400".
As soon as I removed the keyword "search" from the beginning of this query in the alert, it produced results consistent with manually issuing the search (index=myindex sourcetype=waf httpstatus=400). The rationale behind this (if I understood the support engineer correctly) is that the Alert passes the query to the CLI (i.e. /bin/splunk search ), so the CLI interprets the "search" item in my query as a searchable word, not a function.
I'm having the exact problem you describe. Using a search with the trigger condition < 5 results in 10 minutes. The alert is always triggered, and clicking on the view results link shows nothing until the user clicks on the magnifying glass to run the search again. Hopefully someone can offer some insight.
We reached the tentative conclusion that our problem was an overloaded system, causing a delay in indexing. We also opened a case with Splunk support (for the other issues, not related to the false alerts), so far with no results.