Problem entry shows UNKNOWN instead of item count from Trigger

[snowtr]

I upgraded a little while ago from Zabbix 3.4 to 4.0 LTS and since then, I've had a strange result from my WSUS miner.

After all the data is mined and brought to Zabbix, one of the Triggers is named "A number of clients need updates ({ITEM.LASTVALUE})" and with an expression of "{hostname:wsus.miner[Get,Status,ComputerTargetsNeedingUpdatesCount].last()}>0".

This Trigger is set to show up under Problems but always shows up as "A number of clients need updates (*UNKNOWN*)" since the upgrade.

When I check the history of the problem, directly from the Problems page, it takes me to the history of the trigger and shows me valid numbers. For example, it currently shows 18 and shows the trigger to go off when it's above 0.

I don't really know enough about Zabbix to figure out the issue myself so I'm asking for help. I assume that the Trigger's Name is what appears in the Problems list with the work 'UNKOWN' based on what I've said above but I can't figure out why itamar.lastvalue doesn't work.

FYI, currently my Zabbix installation is version 4.0.13, on Ubuntu Server 16.04 LTS that's fully patched.

[dimir]

This was broken in https://support.zabbix.com/browse/ZBXNEXT-4108 .
You probably want to take a look at https://support.zabbix.com/browse/ZBXNEXT-4942 on how to fix it (use "operational data" for live view).

[snowtr]

This was broken in https://support.zabbix.com/browse/ZBXNEXT-4108 .
You probably want to take a look at https://support.zabbix.com/browse/ZBXNEXT-4942 on how to fix it (use "operational data" for live view).

So the short answers are to either upgrade from 4.0 to 4.4 and manually set that toggle to every trigger I have or stop using live data in Trigger names?

[dimir]

Looks like it. Now the live data is only available in the "operational data" field. You have to enable it and move the live part from the name to "operational data".