While it appears that manual reindexing does finish, the view for Administration -> Content Indexing -> Index Summary does not appear to update correctly. After reindexing has completed, the state is reported as "Not Reindexing" in the "Reindexing:" field, yet the Time Elapsed counter continues to increment until tomcat is restarted, even though it reports 100% completion. It looks as though the view is not being updated by the reindexing action.