Awesome! Thanks everyone who gave feedback already. So far it seems that
rc1 is stable and doesn't cause problems after upgrading from 2.2.
A lot of the major changes in 2.3 are tested implicitly after upgrading,
such as the new DocumentsWriter or background merges. However, there are
a bunch of new features, like e. g. IndexReader.reopen(), that can only
be tested by using new APIs. In the following I'm copying the "New
Features" list from the 2.3 change log and hope that some people can
give the new features a try!
Keep testing!
-Michael
New features
1. LUCENE-906: Elision filter for French.
(Mathieu Lecarme via Otis Gospodnetic)
2. LUCENE-960: Added a SpanQueryFilter and related classes to allow for
not only filtering, but knowing where in a Document a Filter matches
(Grant Ingersoll)
3. LUCENE-868: Added new Term Vector access features. New callback
mechanism allows application to define how and where to read Term
Vectors from disk. This implementation contains several extensions
of the new abstract TermVectorMapper class. The new API should be
back-compatible. No changes in the actual storage of Term Vectors
has taken place.
3.1 LUCENE-1038: Added setDocumentNumber() method to TermVectorMapper
to provide information about what document is being accessed.
(Karl Wettin via Grant Ingersoll)
4. LUCENE-975: Added PositionBasedTermVectorMapper that allows for
position based lookup of term vector information.
See item #3 above (LUCENE-868).
5. LUCENE-1011: Added simple tools (all in org.apache.lucene.store)
to verify that locking is working properly. LockVerifyServer runs
a separate server to verify locks. LockStressTest runs a simple
tool that rapidly obtains and releases locks.
VerifyingLockFactory is a LockFactory that wraps any other
LockFactory and consults the LockVerifyServer whenever a lock is
obtained or released, throwing an exception if an illegal lock
obtain occurred. (Patrick Kimber via Mike McCandless)
6. LUCENE-1015: Added FieldCache extension (ExtendedFieldCache) to
support doubles and longs. Added support into SortField for sorting
on doubles and longs as well. (Grant Ingersoll)
7. LUCENE-1020: Created basic index checking & repair tool
(o.a.l.index.CheckIndex). When run without -fix it does a
detailed test of all segments in the index and reports summary
information and any errors it hit. With -fix it will remove
segments that had errors. (Mike McCandless)
8. LUCENE-743: Add IndexReader.reopen() method that re-opens an
existing IndexReader by only loading those portions of an index
that have changed since the reader was (re)opened. reopen() can
be significantly faster than open(), depending on the amount of
index changes. SegmentReader, MultiSegmentReader, MultiReader,
and ParallelReader implement reopen(). (Michael Busch)
9. LUCENE-1040: CharArraySet useful for efficiently checking
set membership of text specified by char[]. (yonik)
10. LUCENE-1073: Created SnapshotDeletionPolicy to facilitate taking a
live backup of an index without pausing indexing. (Mike
McCandless)
11. LUCENE-1019: CustomScoreQuery enhanced to support multiple
ValueSource queries. (Kyle Maxwell via Doron Cohen)
12. LUCENE-1095: Added an option to StopFilter to increase
positionIncrement of the token succeeding a stopped token.
Disabled by default. Similar option added to QueryParser
to consider token positions when creating PhraseQuery
and MultiPhraseQuery. Disabled by default (so by default
the query parser ignores position increments).
(Doron Cohen)
Peter Keegan wrote:
> I've built a production index with rc1 and blasted it with lots of
> concurrent queries and I've seen no problems. I plan to do a lot more
> development and testing with 2.3 in the next few months.
>
> Peter
>
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