mikemccand commented on a change in pull request #2245:
URL: https://github.com/apache/lucene-solr/pull/2245#discussion_r564519920
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File path:
lucene/backward-codecs/src/test/org/apache/lucene/backward_codecs/lucene60/TestLucene60FieldInfosFormat.java
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@@ -14,17 +14,15 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-package org.apache.lucene.codecs.lucene50;
Review comment:
Hmm, why did this previously live under `lucene50` sub-package if it was
`lucene60` format?
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File path:
lucene/backward-codecs/src/java/org/apache/lucene/backward_codecs/lucene60/Lucene60FieldInfosFormat.java
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@@ -311,6 +312,11 @@ private static IndexOptions getIndexOptions(IndexInput
input, byte b) throws IOE
}
}
+ /**
+ * Note: although this format is only used on older versions, we need to
keep the write logic
Review comment:
I don't see how a new vector field would ever be written with this
format? That should use the latest (90) field infos format.
Rather, I think the case that requires writing is when user opens old
index/segment, that had used this `FieldInfosFormat`, and then user updates
some doc values in the docs in this segment, and then `IndexWriter` needs to
write that new doc values field, along with a new `.fnm` (field infos) file.
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