Hello, IndexWriter.addIndexes(Directory...) method says that the index in each directory must not be changed (opened by a writer) while this method is running. However, IndexWriter.addIndexes(IndexReader...) does not say any such thing. Would I be correct in assuming that since an IndexReader has a static snapshot of the index, merging using addIndexes(IndexReader...) is safe even if the source index has a writer open?
-- Regards, Shalin Shekhar Mangar.
