buildbot failure in ASF Buildbot on openjpa-trunk-docs

[buildbot]

The Buildbot has detected a new failure on builder openjpa-trunk-docs while 
building ASF Buildbot. Full details are available at:
    http://ci.apache.org/builders/openjpa-trunk-docs/builds/319

Buildbot URL: http://ci.apache.org/

Buildslave for this Build: lares_ubuntu

Build Reason: The Nightly scheduler named 'openjpaNightly-trunk' triggered this 
build
Build Source Stamp: [branch openjpa/trunk] HEAD
Blamelist: 

BUILD FAILED: failed compile

Sincerely,
 -The Buildbot