ianbrandt opened a new issue, #3770: URL: https://github.com/apache/logging-log4j2/issues/3770
## Description If I update my Spring Boot project from Log4J 2.24.1 to [2.25.0](https://logging.apache.org/log4j/2.x/release-notes.html#release-notes-2-25-0) (no other changes), I no longer get logging output. Per https://github.com/spring-projects/spring-boot/issues/46035: > https://github.com/apache/logging-log4j2/commit/b23e9a56a9cc9eed8c48241555256db8647e917a is a breaking change from Spring Boot's perspective. We call LoggerContext.start(Configuration) on a LoggerContext in STARTED state. This used to result in setConfiguration(Configuration) being called. Since these changes in Log4j2, that no longer happens so Boot's configuration isn't applied. Perhaps we can do something differently that will work with both 2.25.0 and earlier versions but I think this should be investigated by the Log4j2 team in the first instance. I'll close this one for now, we can re-open it if that investigation identifies a change that could be made in Boot to tolerate the change in Log4j2's behavior. ## Configuration **Version:** Log4J 2.25.0 Spring Boot 3.5.1 **Operating system:** MacOS 15.5 (presumably any) **JDK:** ```text % java --version openjdk 21.0.7 2025-04-15 LTS OpenJDK Runtime Environment Temurin-21.0.7+6 (build 21.0.7+6-LTS) OpenJDK 64-Bit Server VM Temurin-21.0.7+6 (build 21.0.7+6-LTS, mixed mode, sharing) ``` ## Logs Log4J 2.24.1 https://github.com/sdkotlin/sd-kotlin-spring-talks/tree/8d40d0c54e700adbc7c7609eb2b04a16223869ab ```text > Task :subprojects:app:run . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.5.1) 2025-06-19T10:14:37.901-07:00 INFO 65736 --- [ main] o.s.s.SpringBootAppKt : Starting SpringBootAppKt using Java 21.0.7 with PID 65736 (/Users/ianbrandt/Development/SDKotlin/sd-kotlin-spring-talks/subprojects/app/build/classes/kotlin/main started by ianbrandt in /Users/ianbrandt/Development/SDKotlin/sd-kotlin-spring-talks/subprojects/app) 2025-06-19T10:14:37.903-07:00 INFO 65736 --- [ main] o.s.s.SpringBootAppKt : No active profile set, falling back to 1 default profile: "default" 2025-06-19T10:14:38.107-07:00 INFO 65736 --- [ main] k.r.KClass : Config path: /Users/ianbrandt/Development/SDKotlin/sd-kotlin-spring-talks/subprojects/app/config 2025-06-19T10:14:38.107-07:00 INFO 65736 --- [atcher-worker-1] k.r.KClass : The current time is 2025-06-19T17:14:38.107189Z 2025-06-19T10:14:38.107-07:00 INFO 65736 --- [ main] k.r.KClass : Log path: /Users/ianbrandt/Development/SDKotlin/sd-kotlin-spring-talks/subprojects/app/logs You've been scanned. 2025-06-19T10:14:38.128-07:00 INFO 65736 --- [ main] o.s.s.SpringBootAppKt : Started SpringBootAppKt in 0.395 seconds (process running for 0.625) 2025-06-19T10:14:38.129-07:00 INFO 65736 --- [ main] o.s.s.ResourcePrinter : classpath:/native-resource.txt content: Testing native resources on MacOS. 2025-06-19T10:14:38.130-07:00 INFO 65736 --- [ main] o.s.s.ResourcePrinter : classpath:/custom-resource.txt content: Testing custom resources. BUILD SUCCESSFUL in 9s ``` Log4J 2.25.0 https://github.com/sdkotlin/sd-kotlin-spring-talks/tree/b15de4858a0c10ab9c267489b1b5a98cf1a9e10d ```text > Task :subprojects:app:run . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.5.1) You've been scanned. BUILD SUCCESSFUL in 1s ``` That one "You've been scanned" line is a plain old `println()`: https://github.com/sdkotlin/sd-kotlin-spring-talks/blob/b15de4858a0c10ab9c267489b1b5a98cf1a9e10d/subprojects/app/src/main/kotlin/org/sdkotlin/springdemo/SpringBootApp.kt#L45. Diff: https://github.com/sdkotlin/sd-kotlin-spring-talks/commit/b15de4858a0c10ab9c267489b1b5a98cf1a9e10d. ## Reproduction Not quite a minimal reproducer, but in case it's of any help: https://github.com/sdkotlin/sd-kotlin-spring-talks/tree/b15de4858a0c10ab9c267489b1b5a98cf1a9e10d `gradlew :subprojects:app:run` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@logging.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
