The plugin reports test failure(s) when running on Java 21:

https://gist.githubusercontent.com/NotMyFault/019429914ed524d9e7fd3636320f93c0/raw/4128ec7a8ce7b04070fabee0b082fbb970fe7716/pipeline-model-definition-plugin-fail.txt

https://gist.githubusercontent.com/NotMyFault/09be260be6213a9bc0d40052b5119fae/raw/a3c596e2551048c9d8bd4a67ade92e3389aed0e7/pipeline-model-definition-plugin-fail.txt

The failures are too long for Jira, hence the gist.

Tested with maven 3.9.4, on macOS 13.5, using OpenJDK 21, build 35 (2023/8/11), calling

mvn clean verify package

, after bumping the plugin pom from 4.66 to 4.72.