[ 
https://issues.apache.org/jira/browse/MDEP-981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Matthias Bünger updated MDEP-981:
---------------------------------
    Description: 
Build is broken on Maven 4 due duplicate dependency delcaration

{code}
PS D:\Github\Maven\maven-dependency-plugin> mvn clean -V         
Apache Maven 4.0.0-rc-3 (3952d00ce65df6753b63a51e86b1f626c55a8df2)
Maven home: C:\apache-maven-4.0.0-rc-3
Java version: 21.0.1, vendor: Eclipse Adoptium, runtime: C:\JDK\Java21
Default locale: de_DE, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "winnt"
[INFO] 
[INFO] 1 problem was encountered while building the effective settings (use -e 
to see details)
[INFO] 
[WARNING] Unable to find the root directory. Create a .mvn directory in the 
root directory or add the root="true" attribute on the root project's model to 
identify it.
[INFO] Scanning for projects...
[ERROR] Some problems were encountered while processing the POMs
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project 
[inherited]:maven-dependency-plugin:maven-plugin:3.8.2-SNAPSHOT 
(D:\Github\Maven\maven-dependency-plugin\pom.xml) has 2 errors
[ERROR]     'dependencies.dependency.(groupId:artifactId:type:classifier)' must 
be unique: org.apache.maven.resolver:maven-resolver-api:jar -> version 
${resolverVersion} vs 1.9.22 @ 
org.apache.maven.plugins:maven-dependency-plugin:3.8.2-SNAPSHOT, 
file:///D:/Github/Maven/maven-dependency-plugin/pom.xml, line 409, column 5
[ERROR]     'dependencies.dependency.(groupId:artifactId:type:classifier)' must 
be unique: org.apache.maven.resolver:maven-resolver-util:jar -> version 
${resolverVersion} vs 1.9.22 @ 
org.apache.maven.plugins:maven-dependency-plugin:3.8.2-SNAPSHOT, 
file:///D:/Github/Maven/maven-dependency-plugin/pom.xml, line 415, column 5
{code}

The resolver version is set to 1.4.1 via property:

{{<resolverVersion>1.4.1</resolverVersion>}}

  was:
Build is broken on Maven 4 due duplicate dependency delcaration

{code}
PS D:\Github\Maven\maven-dependency-plugin> mvn clean -V         
Apache Maven 4.0.0-rc-3 (3952d00ce65df6753b63a51e86b1f626c55a8df2)
Maven home: C:\apache-maven-4.0.0-rc-3
Java version: 21.0.1, vendor: Eclipse Adoptium, runtime: C:\JDK\Java21
Default locale: de_DE, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "winnt"
[INFO] 
[INFO] 1 problem was encountered while building the effective settings (use -e 
to see details)
[INFO] 
[WARNING] Unable to find the root directory. Create a .mvn directory in the 
root directory or add the root="true" attribute on the root project's model to 
identify it.
[INFO] Scanning for projects...
[ERROR] Some problems were encountered while processing the POMs
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project 
[inherited]:maven-dependency-plugin:maven-plugin:3.8.2-SNAPSHOT 
(D:\Github\Maven\maven-dependency-plugin\pom.xml) has 2 errors
[ERROR]     'dependencies.dependency.(groupId:artifactId:type:classifier)' must 
be unique: org.apache.maven.resolver:maven-resolver-api:jar -> version 
${resolverVersion} vs 1.9.22 @ 
org.apache.maven.plugins:maven-dependency-plugin:3.8.2-SNAPSHOT, 
file:///D:/Github/Maven/maven-dependency-plugin/pom.xml, line 409, column 5
[ERROR]     'dependencies.dependency.(groupId:artifactId:type:classifier)' must 
be unique: org.apache.maven.resolver:maven-resolver-util:jar -> version 
${resolverVersion} vs 1.9.22 @ 
org.apache.maven.plugins:maven-dependency-plugin:3.8.2-SNAPSHOT, 
file:///D:/Github/Maven/maven-dependency-plugin/pom.xml, line 415, column 5
{code}


> Non-Unique dependency declaration breaks build (Maven 4)
> --------------------------------------------------------
>
>                 Key: MDEP-981
>                 URL: https://issues.apache.org/jira/browse/MDEP-981
>             Project: Maven Dependency Plugin
>          Issue Type: Bug
>    Affects Versions: 3.8.1
>            Reporter: Matthias Bünger
>            Priority: Critical
>
> Build is broken on Maven 4 due duplicate dependency delcaration
> {code}
> PS D:\Github\Maven\maven-dependency-plugin> mvn clean -V         
> Apache Maven 4.0.0-rc-3 (3952d00ce65df6753b63a51e86b1f626c55a8df2)
> Maven home: C:\apache-maven-4.0.0-rc-3
> Java version: 21.0.1, vendor: Eclipse Adoptium, runtime: C:\JDK\Java21
> Default locale: de_DE, platform encoding: UTF-8
> OS name: "windows 10", version: "10.0", arch: "amd64", family: "winnt"
> [INFO] 
> [INFO] 1 problem was encountered while building the effective settings (use 
> -e to see details)
> [INFO] 
> [WARNING] Unable to find the root directory. Create a .mvn directory in the 
> root directory or add the root="true" attribute on the root project's model 
> to identify it.
> [INFO] Scanning for projects...
> [ERROR] Some problems were encountered while processing the POMs
> [ERROR] The build could not read 1 project -> [Help 1]
> [ERROR]   
> [ERROR]   The project 
> [inherited]:maven-dependency-plugin:maven-plugin:3.8.2-SNAPSHOT 
> (D:\Github\Maven\maven-dependency-plugin\pom.xml) has 2 errors
> [ERROR]     'dependencies.dependency.(groupId:artifactId:type:classifier)' 
> must be unique: org.apache.maven.resolver:maven-resolver-api:jar -> version 
> ${resolverVersion} vs 1.9.22 @ 
> org.apache.maven.plugins:maven-dependency-plugin:3.8.2-SNAPSHOT, 
> file:///D:/Github/Maven/maven-dependency-plugin/pom.xml, line 409, column 5
> [ERROR]     'dependencies.dependency.(groupId:artifactId:type:classifier)' 
> must be unique: org.apache.maven.resolver:maven-resolver-util:jar -> version 
> ${resolverVersion} vs 1.9.22 @ 
> org.apache.maven.plugins:maven-dependency-plugin:3.8.2-SNAPSHOT, 
> file:///D:/Github/Maven/maven-dependency-plugin/pom.xml, line 415, column 5
> {code}
> The resolver version is set to 1.4.1 via property:
> {{<resolverVersion>1.4.1</resolverVersion>}}



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