norrisjeremy opened a new issue, #11436: URL: https://github.com/apache/maven/issues/11436
### Affected version 4.0.0-rc-5 ### Bug description The following example `pom.xml` produces an an error in Maven 4 with the flatten-maven-plugin, but not in Maven 3: ```xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd";> <modelVersion>4.0.0</modelVersion> <groupId>foo</groupId> <artifactId>bar</artifactId> <version>1.0.0-SNAPSHOT</version> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> </properties> <build> <plugins> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>flatten-maven-plugin</artifactId> <version>1.7.3</version> <configuration> <flattenDependencyMode>all</flattenDependencyMode> </configuration> </plugin> </plugins> </build> <dependencies> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.20.1</version> </dependency> </dependencies> </project> ``` Maven 4.0.0-rc-5: ```shell $ mvn flatten:flatten [INFO] Scanning for projects... [INFO] Loaded 21643 auto-discovered prefixes for remote repository central (prefixes-central.txt) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml (14 kB at 36.9 kB/s) Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml (21 kB at 53.2 kB/s) [INFO] [INFO] -------------------------------------------------------< foo:bar >-------------------------------------------------------- [INFO] Building bar 1.0.0-SNAPSHOT [INFO] from pom.xml [INFO] ---------------------------------------------------------[ jar ]---------------------------------------------------------- [INFO] [INFO] --- flatten:1.7.3:flatten (default-cli) @ bar --- [INFO] Generating flattened POM of project foo:bar:jar:1.0.0-SNAPSHOT... [INFO] Artifact com.fasterxml.jackson:jackson-base:pom:2.20.1 is present in the local repository, but cached from a remote repository ID that is unavailable in current build context, verifying that is downloadable from [central-snapshots (https://central.sonatype.com/repository/maven-snapshots, default, snapshots)] [INFO] -------------------------------------------------------------------------------------------------------------------------- [INFO] BUILD FAILURE [INFO] -------------------------------------------------------------------------------------------------------------------------- [INFO] Total time: 0.756 s [INFO] Finished at: 2025-11-13T12:57:22-06:00 [INFO] -------------------------------------------------------------------------------------------------------------------------- [ERROR] Failed to execute goal org.codehaus.mojo:flatten-maven-plugin:1.7.3:flatten (default-cli) on project bar: failed to create a clean pom: unable to create flattened dependencies: caught exception when flattening dependencies: Failed to read artifact descriptor for com.fasterxml.jackson.core:jackson-databind::2.20.1: The following artifacts could not be resolved: com.fasterxml.jackson:jackson-base:pom:2.20.1 (present, but unavailable) (remote repositories: central-snapshots (https://central.sonatype.com/repository/maven-snapshots, default, snapshots)): One or more requests failed -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the '-e' switch [ERROR] Re-run Maven using the '-X' switch to enable verbose output [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException ``` Maven 3.9.11: ```shell $ mvn flatten:flatten WARNING: A terminally deprecated method in sun.misc.Unsafe has been called WARNING: sun.misc.Unsafe::staticFieldBase has been called by com.google.inject.internal.aop.HiddenClassDefiner (file:/Users/ishmael/.sdkman/candidates/maven/current/lib/guice-5.1.0-classes.jar) WARNING: Please consider reporting this to the maintainers of class com.google.inject.internal.aop.HiddenClassDefiner WARNING: sun.misc.Unsafe::staticFieldBase will be removed in a future release [INFO] Scanning for projects... [INFO] [INFO] ------------------------------< foo:bar >------------------------------- [INFO] Building bar 1.0.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- flatten:1.7.3:flatten (default-cli) @ bar --- [INFO] Generating flattened POM of project foo:bar:jar:1.0.0-SNAPSHOT... [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.132 s [INFO] Finished at: 2025-11-13T12:58:56-06:00 [INFO] ------------------------------------------------------------------------ ``` -- 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]
