How can I configure log4j to not print the exception stacktrace?

Question

We use Log4j (and Commons Logging) to log our error messages. Now we want to set up an additional log appender that outputs fatal errors to syslog, but without the exception

Answer 1

As of Log4j2, you can just add "%ex{0}" to your log pattern (assuming you're using PatternLayout)

https://logging.apache.org/log4j/log4j-2.1/manual/layouts.html