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https://issues.apache.org/jira/browse/MASSEMBLY-830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17439379#comment-17439379
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Václav Haisman commented on MASSEMBLY-830:
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FYI, I have just hit this today after updating plugins on an old project. This
time with version 3.3.0.
> Cannot handle relocated artifacts
> ---------------------------------
>
> Key: MASSEMBLY-830
> URL: https://issues.apache.org/jira/browse/MASSEMBLY-830
> Project: Maven Assembly Plugin
> Issue Type: Bug
> Components: dependencySet
> Affects Versions: 2.6
> Environment: $ mvn --version
> Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5;
> 2015-11-10T16:41:47+00:00)
> Maven home: C:\java\apache\maven-3.3.9
> Java version: 1.8.0_92, vendor: Oracle Corporation
> Java home: C:\java\jdk1.8.0_92\jre
> Default locale: en_GB, platform encoding: Cp1252
> OS name: "windows 7", version: "6.1", arch: "amd64", family: "dos"
> Reporter: Martin Todorov
> Priority: Minor
>
> When one of the transitive dependencies is relocated, the
> {{maven-assembly-plugin}} doesn't follow the relocation and check the POM of
> the relocated artifact, but uses the actual POM artifact that declares the
> relocation. Since this POM doesn't define a version for the artifact, the
> build fails with:
> {code}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-assembly-plugin:2.6:single (make-assembly) on
> project blah: Execution make-assembly of goal
> org.apache.maven.plugins:maven-assembly-plugin:2.6:single failed: For
> artifact {com.foo:bar:null:jar}: The version cannot be empty. -> [Help 1]
> {code}
> As this is a transitive dependency of a third-party library, we have no
> control over it and have attempted to define:
> * An {{<exclusion/>}} for this artifact in the dependency which requires it.
> * A direct dependency (as the very first {{<dependency/>}}) to the relocated
> artifact (which has a version defined in the {{pom.xml}}).
> Unfortunately, neither of these helped.
> This is the POM with the relocation:
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <project xsi:schemaLocation=" http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/xsd/maven-4.0.0.xsd " xmlns="
> http://maven.apache.org/POM/4.0.0 "
> xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>com.foo</groupId>
> <artifactId>bar</artifactId>
> <distributionManagement>
> <relocation>
> <classifier>b</classifier>
> <version>1.5</version>
> </relocation>
> </distributionManagement>
> </project>
> {code}
> Please, advise!
> Many thanks in advance!
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