I am currently facing the following problem with Maven 3 when I am trying to build the site. I will appreciate you help on this.
mvn clean site
I got the same problem... works on my developer MacBook, but fails on my Jenkins running on RHEL7 when running mvn site using maven-site-plugin:3.7. I did not test to downgrade the site plugin.
I found another solution. The problem in my case was the maven-project-info-reports-plugin especially the goal dependencies. If I skip the goal with -Dmpir.skip=true my site get's generated (without the dependencies :( report).