Grok pattern - sometimes nesting bracket

[elkuser1234]

Hi

I have a difficult log for me.
Because sometimes I have nested bracket and sometimes i don't

How to parse it in a grok.

[2022-09-05 17:27:24,537] [apps-thread | test-policy] WARN
[2022-09-06 14:19:25,708] [App (app-1) thread #1 - AppsConsumer[apps-notify]] INFO

        grok {

             match => [ "message", "\[%{TIMESTAMP_ISO8601:timestamp}\] \[HOW TO HANDLE THIS:thread\] %{LOGLEVEL:log_level}" ]
             tag_on_failure => ["failed-to-parse"]


        }

Please help

[Badger]

You could try

"^\[%{TIMESTAMP_ISO8601:timestamp}\] \[%{GREEDYDATA:someField}\] %{LOGLEVEL:log_level}$"

[elkuser1234]

Thanks, I was convinced that the above proposal would give me:

{
   "log_level": "] INFO",
   "someField": "App (app-1) thread # 1 - AppsConsumer [apps-notify",
   "timestamp": "2022-09-06 14:19: 25,708"
}

because the grok will stop on the first squere bracket "]"

Today in the morning I understand that there is a squere bracket space log_level, which is why it does not stop on the first bracket