proc.num[,USER] gives 0

[Henry78]

Hi!

I'm not sure what I miss, so please help me to understand why proc.num[,USER] always returns '0'.

Note

• running on Linux
• proc.num[PROC] returns data fine
• Example below is with user and processes from nginx, user www-data, but I have the same issue with (all) others too

$ ps -f -u nginx
UID PID PPID C STIME TTY TIME CMD
www-data 2731 2730 0 2022 ? 00:00:00 nginx: worker process
www-data 2732 2730 0 2022 ? 00:45:26 nginx: worker process
www-data 2733 2730 0 2022 ? 00:44:52 nginx: worker process
www-data 2734 2730 0 2022 ? 00:45:31 nginx: worker process
www-data 2735 2730 0 2022 ? 00:45:29 nginx: worker process
[... lot or more like this ...]

$ zabbix_get -s 127.0.0.1 -k proc.num[]
1094
$ zabbix_get -s 127.0.0.1 -k proc.num[nginx]
81
$ zabbix_get -s 127.0.0.1 -k proc.num[,www-data]
0
$ zabbix_get -s 127.0.0.1 -k proc.num[,,,nginx]
81