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From "Elek, Marton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-15369) Avoid usage of ${project.version} in parent pom
Date Fri, 06 Apr 2018 09:25:00 GMT
Elek, Marton created HADOOP-15369:
-------------------------------------

             Summary: Avoid usage of ${project.version} in parent pom
                 Key: HADOOP-15369
                 URL: https://issues.apache.org/jira/browse/HADOOP-15369
             Project: Hadoop Common
          Issue Type: Bug
          Components: build
    Affects Versions: 3.2.0
            Reporter: Elek, Marton
            Assignee: Elek, Marton


hadoop-project/pom.xml and hadoop-project-dist/pom.xml use _${project.version}_ variable in
dependencyManagement and plugin dependencies.

Unfortunatelly it could not work if we use different version in a child project as ${project.version}
variable is resolved *after* the inheritance.

>From [maven doc|https://maven.apache.org/guides/introduction/introduction-to-the-pom.html#Project_Inheritance]:

{quote}
For example, to access the project.version variable, you would reference it like so:

      <version>${project.version}</version>

One factor to note is that these variables are processed after inheritance as outlined above.
This means that if a parent project uses a variable, then its definition in the child, not
the parent, will be the one eventually used.
{quote}

The community voted to keep ozone in-tree but use a different release cycle. To achieve this
we need different version for selected subproject therefor we can't use ${project.version}
any more. 

 



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