double notifications with Zabbix 5.0. LTS

[bix-u]

Hello everyone,


I need your help with Zabbix monitoring.


In Zabbix 5.0 LTS I'm using one trigger with "multiple" PROBLEM event generation mode. The depending item collects the data 1x day and there should be one notification (mail) per day/host with this configuration.

The problem is: I receive the same mails twice per host/day. It's exactly the same text in the second mail, only the original problem ID is different.


When I change the PROBLEM event generation mode to "single", the mails are coming only once per host. What I'm looking for is a solution of some kind to receive notification once per host every day what is not possible in the "single" mode.

Any thoughts? Or is it a known issue?

[Glencoe]

Any chance the master item changes twice a day? Can you double-check the item update frequency for the master and/or dependent item in the Latest data?

Also, you can investigate what's going on by finding the corresponding problems in Monitoring -> Problems. Click on the specific problem and try to check what's wrong there.

[bix-u]

Hi Glencoe,

it seems to be actually due to Zabbix "problem" generation, because even without activated mail actions the problems still appear twice on the dashboard with different problem IDs. Although the trigger is created on two different items, these collect the information once a day per host, according to the Latest data.

Even if I test the trigger in multiple mode on a single item, the double problem generation per host still exists. Only if I change the trigger mode to single, the problem is generated once per host. I noticed the expression "Normal + Multiple" in the trigger details. In the trigger configuration itself, only "multiple" is selected. Could that be the reason?

[bix-u]

Addendum: Here are the details of the same trigger where only the option "PROBLEM event generation mode" was changed to "single". The trigger no longer triggers a duplicate problem.