And that's why you should have multiple appenders. So in code you write "log.err...

And that's why you should have multiple appenders. So in code you write "log.error("...", exception)" once, but logging writes it in parallel to:

   1. STDOUT for quick and easy look, short format.
   2. File as JSON for node-local collectors.
   3. Proper logging storage like VictoriaLogs/Traces for distributed logging.

Each appender has its own format, some print only short messages, others full stacktraces for all causes (and with extra context information like trace id, customer id etc). I really think STDOUT-only logging is trying to squeeze different purposes into one unformatted stream. (And Go writing everything to STDERR was a really strange choice).

https://www.baeldung.com/logback#bd-appenders