ppkarwasz commented on issue #2065: URL: https://github.com/apache/logging-log4j2/issues/2065#issuecomment-1842375871
@bpholt, Thanks for using Log4j API[1] and noticing the problem. I believe that the source of the problem might be in [Coursier](https://github.com/coursier/coursier). We use both SLF4J 1.7.x and 2.x (for `log4j-slf4j-impl`) in our build. In the `org.apache.logging.log4j:log4j` artifact (parent of `log4j-slf4j-impl`) we define the version of SLF4J: ```xml <properties> <slf4j.api>2.0.9</slf4j.api> </properties> <dependencies> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> </dependencies> ``` while in the `log4j-slf4j-impl` we define: ```xml <properties> <slf4j.version>1.7.25</slf4j.version> </properties> ``` This way to override dependency version is supported by **Maven** (Spring Boot uses it extensively): ``` [INFO] --- dependency:2.8:tree (default-cli) @ sandbox --- [INFO] eu.copernik.sandbox:sandbox:jar:0.0.1-SNAPSHOT [INFO] \- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.22.0:runtime [INFO] +- org.apache.logging.log4j:log4j-api:jar:2.22.0:runtime [INFO] +- org.slf4j:slf4j-api:jar:1.7.25:runtime [INFO] \- org.apache.logging.log4j:log4j-core:jar:2.22.0:runtime ``` Coursier might have a problem with this. You should probably report it there. [1] the problem would not have appeared if you had `slf4j-api` as direct dependency. -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
