Wolf helped me out with a similar issue. https://github.com/BattlePlugins/BattleBukkitLib/issues/3
He alerted me to the Maven-Flatten-Plugin: https://www.mojohaus.org/flatten-maven-plugin/ Quote: "This essentially allows you to use your parent POMs during builds but deletes the reference to them when your artifact gets deployed, integrating the information from the parents at the appropriate places (flattening), reducing the information "leaked" to the consumer of your artifact to the bare minimum." ~Wolf Hopefully that can help solve your issue as well. As for some of your technical questions about the behavior of Maven, we're in the same boat. There are some aspects of Maven that I don't quite understand... but I am extremely curious. Good luck ! Nick ________________________________ From: Kyle Marek <[email protected]> Sent: Saturday, March 16, 2019 5:34 AM To: [email protected] Subject: Usage of dependency-reduced-pom.xml from maven-shade-plugin in a multi-module/reactor project I am having a dependency conflict issue in a project I am working on. Specifically, a dependency of a dependency of a dependency depends on Jersey 1.9 for internal client purposes, while I am using Jersey 2.28 in implementing a REST interface for the high level functionality of the project. Since Jersey 1.9 is basically being used invisibly and behind the scenes inside of my dependency, I am attempting to use maven-shade-plugin to include the dependency and Jersey 1.9 and relocate Jersey to another package while I use Jersey 2.28 up front in its original package. maven-shade-plugin creates a modified POM file with reduced dependencies for installation so dependent projects won't pull in dependencies for the jar when they are already included/shaded in the jar. However, what I am finding is that when the functional component and the web application component of the project are developed as *modules* to an aggregating/parent POM, the build process only accounts for the *original* POM of the shaded functional module with its original/pre-reduced dependencies, which makes the build of the web application module pull in the original dependencies, that should have been shaded, into its WEB-INF/lib/. The dependency management works correctly when installing the shaded functional component, and building the web application module independently. Is this a bug or by design? Is there a proper fix to apply to my POM files, or am I stuck ordering, building and installing each project independently for now? My test case and details follow. Please note that I am demonstrating the issue and left relocations and artifact includes/excludes out of the maven-shade-plugin configuration. See: # POM files [email protected]<mailto:[email protected]> ~/src/shadetest $ cat pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0";<http://maven.apache.org/POM/4.0.0> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";<http://www.w3.org/2001/XMLSchema-instance> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";<http://maven.apache.org/POM/4.0.0http://maven.apache.org/maven-v4_0_0.xsd>> <modelVersion>4.0.0</modelVersion> <groupId>net.gigabyteproductions.maven.shadetest</groupId> <artifactId>shadetest-parent</artifactId> <packaging>pom</packaging> <version>1.0-SNAPSHOT</version> <modules> <module>lib</module> <module>service</module> </modules> <dependencyManagement> <dependencies> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.accumulo</groupId> <artifactId>accumulo-core</artifactId> <version>1.8.1</version> </dependency> </dependencies> </dependencyManagement> <build> <pluginManagement> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>3.0.0</version> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> </plugin> </plugins> </pluginManagement> </build> </project> [email protected]<mailto:[email protected]> ~/src/shadetest $ cat lib/pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0";<http://maven.apache.org/POM/4.0.0> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";<http://www.w3.org/2001/XMLSchema-instance> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";<http://maven.apache.org/POM/4.0.0http://maven.apache.org/maven-v4_0_0.xsd>> <modelVersion>4.0.0</modelVersion> <parent> <groupId>net.gigabyteproductions.maven.shadetest</groupId> <artifactId>shadetest-parent</artifactId> <version>1.0-SNAPSHOT</version> <relativePath>..</relativePath> </parent> <artifactId>shadetest-lib</artifactId> <packaging>jar</packaging> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.apache.accumulo</groupId> <artifactId>accumulo-core</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <!-- <dependencyReducedPomLocation>${project.build.directory}/dependency-reduced-pom.xml</dependencyReducedPomLocation> --> <shadedArtifactAttached>false</shadedArtifactAttached> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/> </transformers> </configuration> </execution> </executions> </plugin> </plugins> </build> </project> [email protected]<mailto:[email protected]> ~/src/shadetest $ cat service/pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0";<http://maven.apache.org/POM/4.0.0> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";<http://www.w3.org/2001/XMLSchema-instance> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";<http://maven.apache.org/POM/4.0.0http://maven.apache.org/maven-v4_0_0.xsd>> <modelVersion>4.0.0</modelVersion> <parent> <groupId>net.gigabyteproductions.maven.shadetest</groupId> <artifactId>shadetest-parent</artifactId> <version>1.0-SNAPSHOT</version> <relativePath>..</relativePath> </parent> <artifactId>shadetest-service</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>net.gigabyteproductions.maven.shadetest</groupId> <artifactId>shadetest-lib</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.glassfish.jersey.containers</groupId> <artifactId>jersey-container-servlet-core</artifactId> <version>2.28</version> </dependency> <dependency> <groupId>org.glassfish.jersey.inject</groupId> <artifactId>jersey-hk2</artifactId> <version>2.28</version> </dependency> </dependencies> </project> # reactor build/install [email protected]<mailto:[email protected]> ~/src/shadetest $ rm -rf ~/.m2/repository/net/gigabyteproductions/maven/shadetest/ [email protected]<mailto:[email protected]> ~/src/shadetest $ mvn clean install [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Reactor Build Order: [INFO] [INFO] shadetest-parent [pom] [INFO] shadetest-lib [jar] [INFO] shadetest-service [war] . . . [INFO] --- maven-shade-plugin:3.0.0:shade (default) @ shadetest-lib --- [INFO] Including org.apache.accumulo:accumulo-core:jar:1.8.1 in the shaded jar. . . . [INFO] Including com.sun.jersey:jersey-core:jar:1.9 in the shaded jar. [INFO] Including com.sun.jersey:jersey-client:jar:1.9 in the shaded jar. . . . [INFO] Replacing original artifact with shaded artifact. [INFO] Replacing /home/kmarek/src/shadetest/lib/target/shadetest-lib-1.0-SNAPSHOT.jar with /home/kmarek/src/shadetest/lib/target/shadetest-lib-1.0-SNAPSHOT-shaded.jar [INFO] Dependency-reduced POM written at: /home/kmarek/src/shadetest/lib/dependency-reduced-pom.xml [INFO] [INFO] --- maven-install-plugin:2.4:install (default-install) @ shadetest-lib --- [INFO] Installing /home/kmarek/src/shadetest/lib/target/shadetest-lib-1.0-SNAPSHOT.jar to /home/kmarek/.m2/repository/net/gigabyteproductions/maven/shadetest/shadetest-lib/1.0-SNAPSHOT/shadetest-lib-1.0-SNAPSHOT.jar [INFO] Installing /home/kmarek/src/shadetest/lib/dependency-reduced-pom.xml to /home/kmarek/.m2/repository/net/gigabyteproductions/maven/shadetest/shadetest-lib/1.0-SNAPSHOT/shadetest-lib-1.0-SNAPSHOT.pom . . . [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] shadetest-parent 1.0-SNAPSHOT ...................... SUCCESS [ 0.264 s] [INFO] shadetest-lib ...................................... SUCCESS [ 5.587 s] [INFO] shadetest-service 1.0-SNAPSHOT ..................... SUCCESS [ 5.087 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 11.045 s [INFO] Finished at: 2019-03-16T00:44:39-04:00 [INFO] ------------------------------------------------------------------------ # Notice the original Accumulo and Jersey dependencies of the lib module were # pulled into the service module, in addition to the shaded lib module # artifact [email protected]<mailto:[email protected]> ~/src/shadetest $ ls -1 service/target/shadetest-service-1.0-SNAPSHOT/WEB-INF/lib/ accumulo-core-1.8.1.jar accumulo-fate-1.8.1.jar accumulo-start-1.8.1.jar activation-1.1.jar aopalliance-repackaged-2.5.0.jar apacheds-i18n-2.0.0-M15.jar apacheds-kerberos-codec-2.0.0-M15.jar api-asn1-api-1.0.0-M20.jar api-util-1.0.0-M20.jar avro-1.7.4.jar commons-beanutils-1.7.0.jar commons-beanutils-core-1.8.0.jar commons-cli-1.2.jar commons-codec-1.4.jar commons-collections-3.2.2.jar commons-compress-1.4.1.jar commons-configuration-1.6.jar commons-digester-1.8.jar commons-httpclient-3.1.jar commons-io-2.4.jar commons-lang-2.4.jar commons-logging-1.1.1.jar commons-math3-3.6.1.jar commons-net-3.1.jar commons-vfs2-2.1.jar curator-client-2.6.0.jar curator-framework-2.6.0.jar curator-recipes-2.6.0.jar gson-2.2.4.jar guava-14.0.1.jar hadoop-annotations-2.6.4.jar hadoop-auth-2.6.4.jar hadoop-client-2.6.4.jar hadoop-common-2.6.4.jar hadoop-hdfs-2.6.4.jar hadoop-mapreduce-client-app-2.6.4.jar hadoop-mapreduce-client-common-2.6.4.jar hadoop-mapreduce-client-core-2.6.4.jar hadoop-mapreduce-client-jobclient-2.6.4.jar hadoop-mapreduce-client-shuffle-2.6.4.jar hadoop-yarn-api-2.6.4.jar hadoop-yarn-client-2.6.4.jar hadoop-yarn-common-2.6.4.jar hadoop-yarn-server-common-2.6.4.jar hk2-api-2.5.0.jar hk2-locator-2.5.0.jar hk2-utils-2.5.0.jar htrace-core-3.0.4.jar htrace-core-3.1.0-incubating.jar httpclient-4.2.5.jar httpcore-4.2.4.jar jackson-core-asl-1.9.13.jar jackson-jaxrs-1.9.13.jar jackson-mapper-asl-1.9.13.jar jackson-xc-1.9.13.jar jakarta.annotation-api-1.3.4.jar jakarta.inject-2.5.0.jar jakarta.ws.rs-api-2.1.5.jar javassist-3.22.0-CR2.jar jaxb-api-2.2.2.jar jcommander-1.48.jar jersey-client-1.9.jar jersey-client-2.28.jar jersey-common-2.28.jar jersey-container-servlet-core-2.28.jar jersey-core-1.9.jar jersey-hk2-2.28.jar jersey-media-jaxb-2.28.jar jersey-server-2.28.jar jetty-util-6.1.26.jar jline-2.11.jar jsr305-1.3.9.jar leveldbjni-all-1.8.jar libthrift-0.9.3.jar log4j-1.2.17.jar netty-3.7.0.Final.jar osgi-resource-locator-1.0.1.jar paranamer-2.3.jar protobuf-java-2.5.0.jar shadetest-lib-1.0-SNAPSHOT.jar slf4j-api-1.7.21.jar slf4j-log4j12-1.6.1.jar snappy-java-1.0.4.1.jar stax-api-1.0-2.jar validation-api-2.0.1.Final.jar xercesImpl-2.9.1.jar xml-apis-1.3.04.jar xmlenc-0.52.jar xz-1.0.jar zookeeper-3.4.6.jar # Independent build of the service module [email protected]<mailto:[email protected]> ~/src/shadetest $ cd service [email protected]<mailto:[email protected]> ~/src/shadetest/service $ mvn clean install . . . [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.662 s [INFO] Finished at: 2019-03-16T00:45:04-04:00 [INFO] ------------------------------------------------------------------------ # Notice the dependencies are reduced to its own dependencies and the shaded # lib module artifact [email protected]<mailto:[email protected]> ~/src/shadetest/service $ ls -1 target/shadetest-service-1.0-SNAPSHOT/WEB-INF/lib/ aopalliance-repackaged-2.5.0.jar hk2-api-2.5.0.jar hk2-locator-2.5.0.jar hk2-utils-2.5.0.jar jakarta.annotation-api-1.3.4.jar jakarta.inject-2.5.0.jar jakarta.ws.rs-api-2.1.5.jar javassist-3.22.0-CR2.jar jersey-client-2.28.jar jersey-common-2.28.jar jersey-container-servlet-core-2.28.jar jersey-hk2-2.28.jar jersey-media-jaxb-2.28.jar jersey-server-2.28.jar osgi-resource-locator-1.0.1.jar shadetest-lib-1.0-SNAPSHOT.jar validation-api-2.0.1.Final.jar
