Zabbix 3.2 why doesn't the trigger fire?

Question

linux

Hello!
There is a data element that rips out lines from the log containing the substring "preprocess got existing bpa for audio file"
It looks like this: log[/opt/stc-trawl/ident/log/ident.log,"preprocess got existing bpa for audio file"]
It works, corresponding records appear in the item history:
04/04/2018 09:18:36
2018-04-04 02:18:09.236 DEBUG 29510 --- [pub-#9597%ident%] cstident.job.preprocess .Preprocess : preprocess got existing bpa for audio file = file:/data/wav/records/bb26s5pqj6jge0rnf8g0.wav
04/03/2018 17:40:34
2018-04-03 09:41:33.022 DEBUG 29510 --- [pub-#2556 %ident%] cstident.job.preprocess.Preprocess : preprocess got existing bpa for audio file = file:/data/wav/records/bb1o90hqj6jge0rnf6c0.
But there is no way to write a trigger that triggers the addition of the next line to the log.
I do this: {hostname:log[/opt/stc-trawl/ident/log/ident.log,"preprocess got existing bpa for audio file"].str(preprocess got existing bpa for audio file)}=1
but trigger does not fire when new matching lines appear in the log. What am I doing wrong?
In fact, I do not need to parse the line (if it came to zabbix, it already matches the pattern ,"preprocess got existing bpa for audio file") - I need to react to the very fact of its appearance in the log.

Answer 1

It seems to me that the nodata function should be ideal.
https://www.zabbix.com/documentation/3.4/en/manual...