benwtrent commented on code in PR #15952:
URL: https://github.com/apache/lucene/pull/15952#discussion_r3095313208
##########
lucene/core/src/java/org/apache/lucene/codecs/KnnVectorsWriter.java:
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@@ -96,18 +107,22 @@ public final void merge(MergeState mergeState) throws
IOException {
}
}
- for (FieldInfo fieldInfo : mergeState.mergeFieldInfos) {
- if (fieldInfo.hasVectorValues()) {
- if (mergeState.infoStream.isEnabled("VV")) {
- mergeState.infoStream.message("VV", "merging " +
mergeState.segmentInfo);
- }
+ try {
+ for (FieldInfo fieldInfo : mergeState.mergeFieldInfos) {
+ if (fieldInfo.hasVectorValues()) {
+ if (mergeState.infoStream.isEnabled("VV")) {
+ mergeState.infoStream.message("VV", "merging " +
mergeState.segmentInfo);
+ }
- mergeOneField(fieldInfo, mergeState);
+ mergeOneField(fieldInfo, mergeState);
- if (mergeState.infoStream.isEnabled("VV")) {
- mergeState.infoStream.message("VV", "merge done " +
mergeState.segmentInfo);
+ if (mergeState.infoStream.isEnabled("VV")) {
+ mergeState.infoStream.message("VV", "merge done " +
mergeState.segmentInfo);
+ }
}
}
+ } finally {
+ afterMerge();
}
finish();
Review Comment:
1. On an exception with merge, all files, etc. should be closed, do we want
to move finish into the `finally`? There may be edge cases, for sure...
2. Are we sure extending PerFieldKnnVectorsFormat is the way forward here?
My point is that this type of thing is doable via experts in Lucene in
different ways than adding another top-level API to the KnnVectorFormat which
then impacts all formats.
I want to be very careful about adding an expert level API that Apache
Lucene itself doesn't actually use.
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