rmuir commented on a change in pull request #315:
URL: https://github.com/apache/lucene/pull/315#discussion_r721421242
##########
File path:
lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90HnswVectorsReader.java
##########
@@ -301,55 +349,62 @@ public KnnGraphValues getGraphValues(String field) throws
IOException {
throw new IllegalArgumentException("No such field '" + field + "'");
}
FieldEntry entry = fields.get(field);
- if (entry != null && entry.indexDataLength > 0) {
+ if (entry != null && entry.graphIndexLength > 0) {
return getGraphValues(entry);
} else {
return KnnGraphValues.EMPTY;
}
}
private KnnGraphValues getGraphValues(FieldEntry entry) throws IOException {
+ if (entry.ordOffsetsByLevel == null) {
+ synchronized (entry) {
Review comment:
> and for some of these times we don't need the graph data (e.g. if we
just do CheckIndex).
Wait, that's a different bug. We should open an issue for it. CheckIndex
should be "checking" the vectors somehow (even if its just uselessly reading
the bytes).
As it documents: "As this tool checks every byte in the index, on a large
index it can take quite a long time to run."
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