JsonVectorAdapter not available in mahout0.8?

Hello Folks, Isn't org.apache.mahout.math.JsonVectorAdapter available after mahout0.4? I do not see any relevant comments in the svn commits as well. I have svn checkedout the main trunk. I am currently using mahout0.8. org.apache.mahout.clustering.AbstractCluster.java makes use of the

Build failed in Jenkins: Mahout-Quality #1642

See https://builds.apache.org/job/Mahout-Quality/1642/ -- [...truncated 3963 lines...] Running org.apache.mahout.cf.taste.impl.recommender.GenericItemBasedRecommenderTest Tests run: 11, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.079 sec Running