After upgrading to version 2.3.x from 2.2.0, we started experiencing issues with our index searches. Some searches produced false positives, while others produce no hits for terms known to be in specific documents that where digested. After setting up tests that created indexes containing single documents we found that version 2.3.x did not add all the tokens from a document the index while 2.2.0 did. The only thing that changed between the tests were the lucene jar being used, and a fresh index was created for each test.
It seems to be some random action that 2.3.x is taking, or not taking. While tokens such as 'traffic' will not be digested in one document, it will in another. Token frequency, order, and relative position seem to not matter, as indexed and non-indexed tokens where across the board. The documents being ingested where XML, and the tokenizer for the documents were the same for 2.2.0 and 2.3.x. We even did a token dump of the documents and verified the documents where being tokenized correctly. I did notice rebuilding the index was quicker with 2.3.x and the index was smaller, but I guess if you aren't adding tokens to the index it is bound to smaller. BTW, we tested versions 2.3.1, 2.3.2, and 2.2.0. We are now back to using 2.2.0. Daniel Rugg
