[jira] [Created] (MNG-6246) Inconsistent override behaivor with BOM vs dependency

["Jay mann (JIRA)" <ji...@apache.org>]

Jay mann created MNG-6246:
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             Summary: Inconsistent override behaivor with BOM vs dependency
                 Key: MNG-6246
                 URL: https://issues.apache.org/jira/browse/MNG-6246
             Project: Maven
          Issue Type: Bug
          Components: Dependencies
    Affects Versions: 3.5.0
         Environment: osx jdk 1.8
            Reporter: Jay mann
         Attachments: mvn-bug.tar.gz

Consider we have 2 BOM files:
bom1 - dependency version 1
bom2 - dependency version 2'

When a bom1 is imported into a parent and bom2 is imported into a child of parernt, child correctly overrides the dependency and uses "verision 2".

When parent does not import bom1 but explicitly states "dependency 1" in the <dependencyManagement> section, and child imports bom2, "version 1" of dependency is used (bom2 in child does not override the dependency)

This seems like inconsistent behavior as documentation explains that a BOM basically imports the <dependencyManagement> section of the bom into the pom current pom.  

If this is expected behavior it should be documented as we recently moved all our dependencyManagement section into a BOM for organizational reasons and it did not work as expected. 

Attached is a sample, to test simply extract and run:

mvn install -f bom1/pom.xml
mvn install -f bom2/pom.xml
mvn dependency:tree -f project/child/pom.xml
mvn dependency:tree -f project2/child/pom.xml

project uses bom in parent and child and is overridden correctly.
project2 parent uses dependency instead of bom, child uses bom but dependency is NOT overridden. 




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