maven-javadoc-plugin 2.10 upgrade breaks build

I have a project that under javadoc plugin 2.9.1 works fine:

[steven [ at ] Anesthetize:~/ot-code/otj-jaxrs](master↑1|✔)% mvn org.apache.maven.plugins:maven-javadoc-plugin:2.9.1:jar
…
[INFO]