Re: [D] Exception causes are truncated while logging exceptions with line number limit [logging-log4j2]
GitHub user vy added a comment to the discussion: Exception causes are
truncated while logging exceptions with line number limit
@ZOUG, a `Throwable` is essentially composed of 3 parts:
1. The stack trace (i.e., `StackTraceElement[]`)
2. A cause (of type `Throwable`)
3. The suppressed exceptions (of type `Throwable[]`)
`Throwable::printStackTrace` renders _all these_ and this is what `%ex`
operates on. That is, given `%ex{N}`, Log4j Core retains the first `N` lines of
the rendered stack trace.
AFAICT, `%ex{N}` was introduced to avoid excessive stack traces, not to trim
redundant information. For your case, I can suggest following options:
1. Combine `%ex` with `%rEx`
2. Experiment with discarding certain packages using
`filters(package,package,...)`
3. [Implement a custom exception
converter](https://logging.apache.org/log4j/2.x/manual/pattern-layout.html#extending)
matching the behavior of `%ex` in Logback
4. Submit a feature request
Would you mind sharing a little bit more detail about your deployment setup,
please? You write these logs to a... file? If so, then what happens next? Do
you feed them to ELK? Can you use [JSON Template
Layout](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html)
instead, since it provides an [`exceptionRootCause`
resolver](https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#event-template-resolver-exceptionRootCause)?
GitHub link:
https://github.com/apache/logging-log4j2/discussions/3803#discussioncomment-13681035
This is an automatically sent email for dev@logging.apache.org.
To unsubscribe, please send an email to: dev-unsubscr...@logging.apache.org
Re: [VOTE] Release Apache Log4j `2.25.1` (RC1)
Something is buggy for me in the Maven wrapper script which causes this error to print out: mvnw: line 114: mvnw/.mvn/wrapper/maven-wrapper.properties: Not a directory cannot read distributionUrl property in mvnw/.mvn/wrapper/maven-wrapper.properties When I tried running the build with a local copy of Maven, I get a different error: [ERROR] size mismatch log4j-api-2.25.1-sources.jar: investigate with diffoscope log4j-api/target/reference/org.apache.logging.log4j/log4j-api-2.25.1-sources.jar log4j-api/target/log4j-api-2.25.1-sources.jar [ERROR] size mismatch log4j-api-2.25.1.module: investigate with diffoscope log4j-api/target/reference/org.apache.logging.log4j/log4j-api-2.25.1.module log4j-api/target/publications/maven/module.json [ERROR] Reproducible Build output summary: 3 files ok, 2 different [ERROR] see diff log4j-api/target/reference/log4j-api-2.25.1.buildinfo log4j-api/target/log4j-api-2.25.1.buildinfo The diff: 0a1,15 > # https://reproducible-builds.org/docs/jvm/ > buildinfo.version=1.0-SNAPSHOT > > name=Apache Log4j API > group-id=org.apache.logging.log4j > artifact-id=log4j-api > version=2.25.1 > > # source information > source.scm.uri=scm:git:https://github.com/apache/logging-log4j2.git > source.scm.tag=rel/2.25.1 > > # build instructions > build-tool=mvn > 2,3c17,19 < java.version=17 (from MANIFEST.MF Build-Jdk-Spec) < os.name=Unix (from pom.properties newline) --- > java.version=17.0.15 > java.vendor=Apple Inc. > os.name=Mac OS X 4a21,25 > # Maven rebuild instructions and effective environment > mvn.version=3.9.10 > > # output > 22,23c43,44 < outputs.3.length=293959 < outputs.3.checksums.sha512=a85f1d8b55567e579d23a5c73f3d7345dce5b835cb792f542f64d28250d307531f0e91817e61bd9ca6a2069d6992641e65ed4c3a3b8d699b52ebd6bf4c08e18c --- > outputs.3.length=293922 > outputs.3.checksums.sha512=104f3d1d5c4ba247b919f622653eb9f8f44d3780b742104d4b68cc09af5b30655e202480f5a0a957efeb85260e10b440c56c2fac8c114927bbb194df135c9c24 27,28c48,49 < outputs.4.length=2906 < outputs.4.checksums.sha512=6811bd5c5b51012c2734331338089aade55708afa619761cbe129a1fc68d6e1be3c8f32d601689d0811784496ad2523979106f92560086b0f107dbb691e87511 --- > outputs.4.length=2907 > outputs.4.checksums.sha512=bdfb25da0e910bd45e1f30007e9ab19aa3a802e5471d6266599f2b231f8a8a39e0f3790e212b4dac5c96e3642ae04b962a414c95fb6f7f760807358973ba9a43 > On Jul 5, 2025, at 16:08, Piotr P. Karwasz wrote: > > te
