Upgrade from Maven 3.8.4 to 3.9.1 breaks flattening in plugin version > 1.3

[william00179]

Hi there,

I have upgraded from Maven 3.8.4 to 3.9.1 and noticed that dependencies in the parent POM were no longer being pulled into the leaf POM. Dropping the version of the plugin back to 1.3.0 resolved the issue.

What information do you need from me to investigate this issue?

[slawekjaranowski]

As usual simple project which can be used to reproduce issue and finally can be added to IT.

You can look at examples in current ITs
https://github.com/mojohaus/flatten-maven-plugin/tree/master/src/it/projects

[slawekjaranowski]

There is test similar to what you describe:
https://github.com/mojohaus/flatten-maven-plugin/tree/master/src/it/projects/inherit-parent-dependency

I'm right?

[slachiewicz]

maybe its related to https://issues.apache.org/jira/browse/MRESOLVER-357

[slawekjaranowski]

@slachiewicz @william00179 without example reproduce project we can only guess

[hkampbjorn]

This sounds similar to issue #337. Does versions 1.4.0 and later work for you with maven versions before 3.9?