The FAQ clearly states that document IDs will not be re-assigned unless something was deleted. http://wiki.apache.org/lucene-java/LuceneFAQ#When_is_it_possible_for_document_IDs_to_change.3F
However, a number of other emails and posts I've read mention that renumbering occurs when segments are merged. Maybe what people mean is simply that when something is deleted, nothing is immediately renumbered, and it's not until merge time that the renumbering happens. (This is my understanding of how it works.) Just so I'm 100% clear, if I never delete anything, will the IDs ever change? Thanks, Chris
