mayya-sharipova commented on code in PR #842:
URL: https://github.com/apache/lucene/pull/842#discussion_r861981910
##########
lucene/core/src/java/org/apache/lucene/index/FieldInfos.java:
##########
@@ -178,7 +179,15 @@ public static FieldInfos getMergedFieldInfos(IndexReader
reader) {
.filter(Objects::nonNull)
.findAny()
.orElse(null);
- final Builder builder = new Builder(new FieldNumbers(softDeletesField));
+ final int indexCreatedVersionMajor =
+ leaves.stream()
+ .map(l -> l.reader().getMetaData())
+ .filter(Objects::nonNull)
+ .mapToInt(r -> r.getCreatedVersionMajor())
+ .min()
+ .orElse(Version.LATEST.major);
Review Comment:
I am interested when it is possible for segments to have different
`getCreatedVersionMajor()`? Looking at the
[code](https://github.com/apache/lucene/blob/main/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java#L1125)
of `IndexWriter` it looks like if we open an `IndexWriter` for append, new
segments will always have the same `indexCreatedVersionMajor` as previous
segments?
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