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https://issues.apache.org/jira/browse/MNG-5988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15353489#comment-15353489
]
Christian Schulte commented on MNG-5988:
----------------------------------------
This contradicts the way Maven performs dependency resolution. There are
multiple solutions to this. The easiest is to just move the dependency in
question up in the hierarchy so that it gets selected.
> Dependency mediation should prioritize transitive dependencies based on scope.
> ------------------------------------------------------------------------------
>
> Key: MNG-5988
> URL: https://issues.apache.org/jira/browse/MNG-5988
> Project: Maven
> Issue Type: Bug
> Components: Dependencies
> Affects Versions: 3.2.3
> Reporter: Jostein Gogstad
>
> The
> [documentation|https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html]
> states that dependency mediation only supports "nearest definition",
> regardless of the scope of the parent dependency.
> If both compile- and test scoped dependencies shares the same transitive
> dependency, the test-scoped one will win if it has shallower depth. That in
> turn will lead to runtime exceptions since the transitive dependency is no
> longer on the classpath.
> Take the following pom from a typical [Spring
> Boot|http://projects.spring.io/spring-boot/] application. Since the
> {{camel-test-spring}} dependency also depends on spring, it wins and Spring
> is no longer available to the application at runtime.
> {code:xml}
> <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/maven-v4_0_0.xsd";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>com.example</groupId>
> <artifactId>bugreport</artifactId>
> <packaging>jar</packaging>
> <version>1.0.0-SNAPSHOT</version>
> <dependencies>
> <dependency>
> <groupId>org.springframework.boot</groupId>
> <artifactId>spring-boot-starter-web</artifactId>
> <version>1.3.2.RELEASE</version>
> </dependency>
> <dependency>
> <groupId>org.apache.camel</groupId>
> <artifactId>camel-test-spring</artifactId>
> <version>2.16.2</version>
> <scope>test</scope>
> </dependency>
> </dependencies>
> </project>
> {code}
> Now look for {{spring-beans}} or {{spring-context}} in the following
> dependency graphs:
> {code:xml|title=mvn dependency:tree (with camel-test-spring)}
> [INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ bugreport ---
> [INFO] com.example:bugreport:jar:1.0.0-SNAPSHOT
> [INFO] +-
> org.springframework.boot:spring-boot-starter-web:jar:1.3.2.RELEASE:compile
> [INFO] | +-
> org.springframework.boot:spring-boot-starter:jar:1.3.2.RELEASE:compile
> [INFO] | | +- org.springframework.boot:spring-boot:jar:1.3.2.RELEASE:compile
> [INFO] | | +-
> org.springframework.boot:spring-boot-autoconfigure:jar:1.3.2.RELEASE:compile
> [INFO] | | +-
> org.springframework.boot:spring-boot-starter-logging:jar:1.3.2.RELEASE:compile
> [INFO] | | | +- ch.qos.logback:logback-classic:jar:1.1.3:compile
> [INFO] | | | | \- ch.qos.logback:logback-core:jar:1.1.3:compile
> [INFO] | | | +- org.slf4j:jcl-over-slf4j:jar:1.7.13:compile
> [INFO] | | | +- org.slf4j:jul-to-slf4j:jar:1.7.13:compile
> [INFO] | | | \- org.slf4j:log4j-over-slf4j:jar:1.7.13:compile
> [INFO] | | \- org.yaml:snakeyaml:jar:1.16:runtime
> [INFO] | +-
> org.springframework.boot:spring-boot-starter-tomcat:jar:1.3.2.RELEASE:compile
> [INFO] | | +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.0.30:compile
> [INFO] | | +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.0.30:compile
> [INFO] | | +-
> org.apache.tomcat.embed:tomcat-embed-logging-juli:jar:8.0.30:compile
> [INFO] | | \-
> org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.0.30:compile
> [INFO] | +-
> org.springframework.boot:spring-boot-starter-validation:jar:1.3.2.RELEASE:compile
> [INFO] | | \- org.hibernate:hibernate-validator:jar:5.2.2.Final:compile
> [INFO] | | +- javax.validation:validation-api:jar:1.1.0.Final:compile
> [INFO] | | +- org.jboss.logging:jboss-logging:jar:3.2.1.Final:compile
> [INFO] | | \- com.fasterxml:classmate:jar:1.1.0:compile
> [INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.6.5:compile
> [INFO] | | +-
> com.fasterxml.jackson.core:jackson-annotations:jar:2.6.0:compile
> [INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.6.5:compile
> [INFO] | +- org.springframework:spring-web:jar:4.2.4.RELEASE:compile
> [INFO] | \- org.springframework:spring-webmvc:jar:4.2.4.RELEASE:compile
> [INFO] \- org.apache.camel:camel-test-spring:jar:2.16.2:test
> [INFO] +- org.apache.camel:camel-test:jar:2.16.2:test
> [INFO] | +- org.apache.camel:camel-core:jar:2.16.2:test
> [INFO] | | \- org.slf4j:slf4j-api:jar:1.6.6:compile
> [INFO] | \- junit:junit:jar:4.11:test
> [INFO] | \- org.hamcrest:hamcrest-core:jar:1.3:test
> [INFO] +- org.apache.camel:camel-spring:jar:2.16.2:test
> [INFO] +- org.springframework:spring-test:jar:4.1.9.RELEASE:test
> [INFO] +- org.springframework:spring-context:jar:4.1.9.RELEASE:compile
> [INFO] +- org.springframework:spring-beans:jar:4.1.9.RELEASE:compile
> [INFO] +- org.springframework:spring-expression:jar:4.1.9.RELEASE:compile
> [INFO] +- org.springframework:spring-aop:jar:4.1.9.RELEASE:compile
> [INFO] | \- aopalliance:aopalliance:jar:1.0:compile
> [INFO] +- org.springframework:spring-tx:jar:4.1.9.RELEASE:test
> [INFO] +- org.springframework:spring-core:jar:4.1.9.RELEASE:compile
> [INFO] | \- commons-logging:commons-logging:jar:1.2:compile
> [INFO] +- com.sun.xml.bind:jaxb-core:jar:2.2.11:test
> [INFO] \- com.sun.xml.bind:jaxb-impl:jar:2.2.11:test
> {code}
> {code:xml|title=mvn dependency:tree (without camel-test-spring)}
> [INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ bugreport ---
> [INFO] com.example:bugreport:jar:1.0.0-SNAPSHOT
> [INFO] \-
> org.springframework.boot:spring-boot-starter-web:jar:1.3.2.RELEASE:compile
> [INFO] +-
> org.springframework.boot:spring-boot-starter:jar:1.3.2.RELEASE:compile
> [INFO] | +- org.springframework.boot:spring-boot:jar:1.3.2.RELEASE:compile
> [INFO] | +-
> org.springframework.boot:spring-boot-autoconfigure:jar:1.3.2.RELEASE:compile
> [INFO] | +-
> org.springframework.boot:spring-boot-starter-logging:jar:1.3.2.RELEASE:compile
> [INFO] | | +- ch.qos.logback:logback-classic:jar:1.1.3:compile
> [INFO] | | | +- ch.qos.logback:logback-core:jar:1.1.3:compile
> [INFO] | | | \- org.slf4j:slf4j-api:jar:1.7.7:compile
> [INFO] | | +- org.slf4j:jcl-over-slf4j:jar:1.7.13:compile
> [INFO] | | +- org.slf4j:jul-to-slf4j:jar:1.7.13:compile
> [INFO] | | \- org.slf4j:log4j-over-slf4j:jar:1.7.13:compile
> [INFO] | +- org.springframework:spring-core:jar:4.2.4.RELEASE:compile
> [INFO] | \- org.yaml:snakeyaml:jar:1.16:runtime
> [INFO] +-
> org.springframework.boot:spring-boot-starter-tomcat:jar:1.3.2.RELEASE:compile
> [INFO] | +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.0.30:compile
> [INFO] | +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.0.30:compile
> [INFO] | +-
> org.apache.tomcat.embed:tomcat-embed-logging-juli:jar:8.0.30:compile
> [INFO] | \-
> org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.0.30:compile
> [INFO] +-
> org.springframework.boot:spring-boot-starter-validation:jar:1.3.2.RELEASE:compile
> [INFO] | \- org.hibernate:hibernate-validator:jar:5.2.2.Final:compile
> [INFO] | +- javax.validation:validation-api:jar:1.1.0.Final:compile
> [INFO] | +- org.jboss.logging:jboss-logging:jar:3.2.1.Final:compile
> [INFO] | \- com.fasterxml:classmate:jar:1.1.0:compile
> [INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.6.5:compile
> [INFO] | +-
> com.fasterxml.jackson.core:jackson-annotations:jar:2.6.0:compile
> [INFO] | \- com.fasterxml.jackson.core:jackson-core:jar:2.6.5:compile
> [INFO] +- org.springframework:spring-web:jar:4.2.4.RELEASE:compile
> [INFO] | +- org.springframework:spring-aop:jar:4.2.4.RELEASE:compile
> [INFO] | | \- aopalliance:aopalliance:jar:1.0:compile
> [INFO] | +- org.springframework:spring-beans:jar:4.2.4.RELEASE:compile
> [INFO] | \- org.springframework:spring-context:jar:4.2.4.RELEASE:compile
> [INFO] \- org.springframework:spring-webmvc:jar:4.2.4.RELEASE:compile
> [INFO] \-
> org.springframework:spring-expression:jar:4.2.4.RELEASE:compile
> {code}
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