When no packaging is specified, an invalid artifact URL is assigned to the *_ARTIFACT_URL env variable.
E.g. use the following configuration:
- Repository Base URL=http://repo1.maven.org/maven2
- Artifact Group ID=org.apache.commons
- Artifact ID=commons-lang3
When starting a build, it is provided with the following environment variables:
- The artifact URL is missing the jar extension
- The variable ANY_JAR_PACKAGING is missing