LUCENE-3390: Merge changes entry
git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1173704 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index f270e13..cd1cb47 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -581,6 +581,19 @@
======================= Lucene 3.5.0 =======================
+Changes in backwards compatibility policy
+
+* LUCENE-3390: The first approach in Lucene 3.4.0 for missing values
+ support for sorting had a design problem that made the missing value
+ be populated directly into the FieldCache arrays during sorting,
+ leading to concurrency issues. To fix this behaviour, the method
+ signatures had to be changed:
+ - FieldCache.getUnValuedDocs() returns the interface Bits instead DocIdSet
+ - FieldComparator.setMissingValue() was removed and added to
+ constructor
+ As this is expert API, most code will not be affected.
+ (Uwe Schindler, Doron Cohen, Mike McCandless)
+
Bug fixes
* LUCENE-3412: SloppyPhraseScorer was returning non-deterministic results
@@ -598,6 +611,11 @@
QueryWrapperFilter and similar classes to get a top-level DocIdSet.
(Dan C., Uwe Schindler)
+* LUCENE-3390: Corrected handling of missing values when two parallel searches
+ using different missing values for sorting: the missing value was populated
+ directly into the FieldCache arrays during sorting, leading to concurrency
+ issues. (Uwe Schindler, Doron Cohen, Mike McCandless)
+
New Features
Optimizations
