GitHub user ZOUG added a comment to the discussion: Exception causes are
truncated while logging exceptions with line number limit
I was considering to move to `log4j2` from `logback`, whose default behavior
for `%ex{5}` is printing 5 lines of stack trace for **each exception level
(including the outermost exception and its causes)**. I wasn't aware of the
`%rEx` parameter before. So I tried `%rEx{5}` and it shows something like this.
```
java.lang.RuntimeException: Cause
... 74 more
Wrapped by: java.lang.RuntimeException: Nested exception
at com.example.LoggingTest.testLogger(LoggingTest.java:20)
~[test-classes/:?]
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
~[?:?]
```
The cause exception is shown -- which is helpful -- but its stack trace is
still not printed as expected.
GitHub link:
https://github.com/apache/logging-log4j2/discussions/3803#discussioncomment-13667884
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