Hi, I had to kill Lucene-3.x build #34 [1] and restart the Hudson slave on lucene.zones.apache.org as the process was stuck since two days. Looks like the slave got confused due to a communication problem with the Hudson master, most likely because of an overload on master.
[1] http://hudson.zones.apache.org/hudson/job/Lucene-3.x/34/ BR, Jukka Zitting