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http://jira.codehaus.org/browse/MNG-4869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=240021#action_240021
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Benjamin Bentmann commented on MNG-4869:
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No offense but seriously, despite some rumors, Maven is a build tool, not some
esoteric box, i.e. there is little point in talking about impressions. All that
matters are logs and reproducible examples, otherwise we end up talking about
thin air. So, taking the example project I provided and changing
{{child/pom.xml}} to inherit from {{parent2:1.1-SNAPSHOT}}, I see both Maven
2.x and 3.x failing to locate the parent (assuming version 1.1-SNAPSHOT wasn't
installed to the local repo before). Yes, there are some changes regarding
parent resolution, but I fail to see how those affect the example project or
for that matter your setup (which I don't know but can only guess).
> Warn when relativePath points at parent POM with different version
> ------------------------------------------------------------------
>
> Key: MNG-4869
> URL: http://jira.codehaus.org/browse/MNG-4869
> Project: Maven 2 & 3
> Issue Type: Improvement
> Components: POM
> Affects Versions: 3.0
> Environment: Apache Maven 3.0 (r1004208; 2010-10-04 13:50:56+0200)
> Java version: 1.6.0_20
> Java home: /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home
> Default locale: en_US, platform encoding: MacRoman
> OS name: "mac os x" version: "10.6.4" arch: "x86_64" Family: "mac"
> Reporter: Joern Huxhorn
> Priority: Trivial
> Attachments: MNG-4869.zip
>
>
> We have the following situation in our project:
> A parent pom containing the following infos:
> {code:xml}
> <properties>
> <jettyVersion>6.1.9</jettyVersion>
> </properties>
> <build>
> <plugins>
> <plugin>
> <groupId>org.mortbay.jetty</groupId>
> <artifactId>maven-jetty-plugin</artifactId>
> <version>${jettyVersion}</version>
> </plugin>
> </plugins>
> </build>
> {code}
> A child module with the following configuration:
> {code:xml}
> <build>
> <plugins>
> <plugin>
> <groupId>org.mortbay.jetty</groupId>
> <artifactId>maven-jetty-plugin</artifactId>
> <dependencies>
> <dependency>
> <groupId>org.mortbay.jetty</groupId>
> <artifactId>jetty-plus</artifactId>
> <version>${jettyVersion}</version>
> </dependency>
> <dependency>
> <groupId>org.mortbay.jetty</groupId>
> <artifactId>jetty-naming</artifactId>
> <version>${jettyVersion}</version>
> </dependency>
> </dependencies>
> </plugin>
> </plugins>
> </build>
> {code}
> The property jettyVersion was added during the latest. The parent pom is the
> first sub-module in the master pom, followed by the other sub-modules
> including the child-module above. All <parent> definitions include correct
> <relativePath> entries.
> Previously, it worked perfectly well to simply build the master pom, which in
> turn built the parent followed by all other sub-modules.
> Since Maven 3, however, this didn't work anymore. Right after the addition of
> the jettyVersion property, Maven 3 complained with the following error:
> {noformat}
> [ERROR] The build could not read 24 projects -> [Help 1]
> [ERROR]
> [ERROR] The project xyz:2.0.0-SNAPSHOT (/path/to/child/pom.xml) has 2 errors
> [ERROR]
> 'build.plugins.plugin[org.mortbay.jetty:maven-jetty-plugin].dependencies.dependency.version'
> for org.mortbay.jetty:jetty-plus:jar must be a valid version but is
> '${jettyVersion}'. @ line 28, column 28
> [ERROR]
> 'build.plugins.plugin[org.mortbay.jetty:maven-jetty-plugin].dependencies.dependency.version'
> for org.mortbay.jetty:jetty-naming:jar must be a valid version but is
> '${jettyVersion}'. @ line 33, column 28
> {noformat}
> Building the parent manually fixed this issue.
> To be precise, our actual project involved another parent level, i.e. the
> parent described above was the parent of parent2 while parent2 was the parent
> of the child module - but I don't think that this is relevant. I'm just
> mentioning it just in case. Again, all <parent> definitions include correct
> <relativePath> entries.
> This worked in Maven 2 so I think it's a regression.
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