bugmakerrrrrr opened a new pull request, #13162:
URL: https://github.com/apache/lucene/pull/13162
### Description
`LeafReader#getXXXVectorValues` may return null value.
**Reproduction**:
```
public class TestKnnByteVectorQuery extends BaseKnnVectorQueryTestCase {
public void testVectorEncodingMismatch() throws IOException {
try (Directory indexStore =
getIndexStore("field", new float[] {0, 1}, new float[] {1, 2}, new
float[] {0, 0});
IndexReader reader = DirectoryReader.open(indexStore)) {
AbstractKnnVectorQuery query =
new KnnFloatVectorQuery("field", new float[] {0, 1}, 10);
IndexSearcher searcher = newSearcher(reader);
searcher.search(query, 10);
}
}
}
```
**Output**:
```
java.lang.NullPointerException: Cannot invoke
"org.apache.lucene.index.FloatVectorValues.size()" because the return value of
"org.apache.lucene.index.LeafReader.getFloatVectorValues(String)" is null
at
__randomizedtesting.SeedInfo.seed([A63D89233AB7E539:F77A9739A165CB8D]:0)
at
org.apache.lucene.search.KnnFloatVectorQuery.approximateSearch(KnnFloatVectorQuery.java:92)
at
org.apache.lucene.search.AbstractKnnVectorQuery.getLeafResults(AbstractKnnVectorQuery.java:120)
at
org.apache.lucene.search.AbstractKnnVectorQuery.searchLeaf(AbstractKnnVectorQuery.java:104)
at
org.apache.lucene.search.AbstractKnnVectorQuery.lambda$rewrite$0(AbstractKnnVectorQuery.java:89)
at
org.apache.lucene.search.TaskExecutor$TaskGroup.lambda$createTask$0(TaskExecutor.java:117)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at
org.apache.lucene.search.TaskExecutor$TaskGroup.invokeAll(TaskExecutor.java:152)
at org.apache.lucene.search.TaskExecutor.invokeAll(TaskExecutor.java:76)
at
org.apache.lucene.search.AbstractKnnVectorQuery.rewrite(AbstractKnnVectorQuery.java:91)
at
org.apache.lucene.search.KnnFloatVectorQuery.rewrite(KnnFloatVectorQuery.java:45)
at
org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:731)
at
org.apache.lucene.tests.search.AssertingIndexSearcher.rewrite(AssertingIndexSearcher.java:69)
at
org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:742)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:626)
at
org.apache.lucene.search.IndexSearcher.searchAfter(IndexSearcher.java:483)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:498)
at
org.apache.lucene.search.TestKnnByteVectorQuery.testVectorEncodingMismatch(TestKnnByteVectorQuery.java:47)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
```
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