Github user 1ambda commented on the issue:
https://github.com/apache/zeppelin/pull/1668
It is safe to centralise `${plugin.download.version}` only in
`spark-dependency` to the root `pom.xml`
```
$ spark-dependencies git:(chore/centralize-maven-pom-versions) ag
"download-maven-plugin"
dependency-reduced-pom.xml
510: <artifactId>download-maven-plugin</artifactId>
579: <artifactId>download-maven-plugin</artifactId>
pom.xml
827: <artifactId>download-maven-plugin</artifactId>
905: <artifactId>download-maven-plugin</artifactId>
984: <artifactId>download-maven-plugin</artifactId>
$ spark-dependencies git:(chore/centralize-maven-pom-versions)
```
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
