Github user afs commented on the issue:
https://github.com/apache/jena/pull/500
> it appears that the maven tools are no being built as part of the main
project. Is that the case?
Yes, I'm afraid it is. Some tests fail when used with Apache parent >19 (I
just checked with v21 - this is still the case).
```
[ERROR] The following builds failed:
[ERROR] * schemagen-integration-1/pom.xml
[ERROR] * schemagen-integration-4/pom.xml
[ERROR] * schemagen-integration-2/pom.xml
[ERROR] * schemagen-integration-0/pom.xml
[ERROR] * schemagen-integration-3/pom.xml
```
---
