mikemccand commented on a change in pull request #2256:
URL: https://github.com/apache/lucene-solr/pull/2256#discussion_r569643083
##########
File path:
lucene/core/src/java/org/apache/lucene/index/StandardDirectoryReader.java
##########
@@ -143,12 +158,17 @@ static StandardDirectoryReader open(
writer.incRefDeleter(segmentInfos);
+ if (writer.getConfig().getLeafSorter() != null) {
+ readers.sort(writer.getConfig().getLeafSorter());
Review comment:
Is IWC.leafSorter allowed to be live-updated? If so, maybe we should
pull out local variable here to hold onto the `leafSorter` and use that
variable here and below, to ensure it is the same?
##########
File path:
lucene/core/src/java/org/apache/lucene/index/StandardDirectoryReader.java
##########
@@ -169,7 +189,10 @@ static StandardDirectoryReader open(
* @lucene.internal
*/
public static DirectoryReader open(
- Directory directory, SegmentInfos infos, List<? extends LeafReader>
oldReaders)
+ Directory directory,
Review comment:
Are we handling the near-real-time reader (`IndexWriter.getReader(...)`)
path here too?
##########
File path:
lucene/core/src/java/org/apache/lucene/index/StandardDirectoryReader.java
##########
@@ -39,33 +40,44 @@
final IndexWriter writer;
final SegmentInfos segmentInfos;
+ private final Comparator<LeafReader> leafSorter;
private final boolean applyAllDeletes;
private final boolean writeAllDeletes;
- /** called only from static open() methods */
+ /**
+ * package private constructor, called only from static open() methods. If
parameter {@code
+ * leafSorter} is not {@code null}, the provided {@code readers} are
expected to be already sorted
Review comment:
Could we add an `assertLeavesSorted` method to confirm they really were
properly sorted by the caller? There are so many paths for creating
`StandardDirectoryReader` through are code base that it would not surprise me
if one of the misses to sort properly.
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