While going through the change doc for Lucene 1.9 , I came upon this
statement/change:
When opening an IndexWriter with create=true, Lucene now only deletes
its own files from the index directory (looking at the file name
suffixes
to decide if a file belongs to Lucene). The old behavior was to delete
all files. (Daniel Naber and Bernhard Messer, bug #34695)
I want to know why would any files except the "lucene" files be preserved in
case there is a delete, is'nt the point of delete to take out all the
existing files , am I missing something ? Please let me know
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