This particular line is currently throwing a Nullpointer during the execution of ant fresh_install, causing the build to fail

[java] 2013-10-17 08:35:55,334 INFO  org.dspace.search.DSIndexer @ Updating and Cleaning Index
     [java] Exception in thread "main" java.lang.NullPointerException
     [java] 	at org.dspace.search.DSIndexer.cleanIndex(DSIndexer.java:597)
     [java] 	at org.dspace.search.DSIndexer.main(DSIndexer.java:500)