Build: https://jenkins.thetaphi.de/job/Lucene-MMAPv2-Linux/2436/
Java: 64bit/hotspot/jdk-24-ea+16 -XX:-UseCompressedOops -XX:+UseSerialGC

3 tests failed.
FAILED:  
org.apache.lucene.codecs.lucene99.TestLucene99HnswQuantizedVectorsFormat.testMergeStability

Error Message:
java.lang.IllegalStateException: only supports forward iteration: ord=4, 
lastOrd=2

Stack Trace:
java.lang.IllegalStateException: only supports forward iteration: ord=4, 
lastOrd=2
        at 
org.apache.lucene.codecs.KnnVectorsWriter$MergedVectorValues$MergedFloat32VectorValues.vectorValue(KnnVectorsWriter.java:359)
        at 
org.apache.lucene.util.quantization.ScalarQuantizer.fromVectorsAutoInterval(ScalarQuantizer.java:389)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.buildScalarQuantizer(Lucene99ScalarQuantizedVectorsWriter.java:684)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.mergeAndRecalculateQuantiles(Lucene99ScalarQuantizedVectorsWriter.java:662)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.mergeOneFieldToIndex(Lucene99ScalarQuantizedVectorsWriter.java:260)
        at 
org.apache.lucene.codecs.lucene99.Lucene99HnswVectorsWriter.mergeOneField(Lucene99HnswVectorsWriter.java:337)
        at 
org.apache.lucene.codecs.perfield.PerFieldKnnVectorsFormat$FieldsWriter.mergeOneField(PerFieldKnnVectorsFormat.java:121)
        at 
org.apache.lucene.codecs.KnnVectorsWriter.merge(KnnVectorsWriter.java:105)
        at 
org.apache.lucene.index.SegmentMerger.mergeVectorValues(SegmentMerger.java:271)
        at 
org.apache.lucene.index.SegmentMerger.mergeWithLogging(SegmentMerger.java:314)
        at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:158)
        at 
org.apache.lucene.index.IndexWriter.addIndexesReaderMerge(IndexWriter.java:3468)
        at 
org.apache.lucene.index.IndexWriter$AddIndexesMergeSource.merge(IndexWriter.java:3345)
        at 
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:668)
        at 
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:729)


FAILED:  
org.apache.lucene.codecs.lucene99.TestLucene99ScalarQuantizedVectorsFormat.testDifferentCodecs2

Error Message:
com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught 
exception in thread: Thread[id=1947, name=Lucene Merge Thread #0, 
state=RUNNABLE, group=TGRP-TestLucene99ScalarQuantizedVectorsFormat]

Stack Trace:
com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught 
exception in thread: Thread[id=1947, name=Lucene Merge Thread #0, 
state=RUNNABLE, group=TGRP-TestLucene99ScalarQuantizedVectorsFormat]
        at 
__randomizedtesting.SeedInfo.seed([EC88337441443B17:40AA4835EB79A95]:0)
Caused by: org.apache.lucene.index.MergePolicy$MergeException: 
java.lang.IllegalStateException: only supports forward iteration: ord=4, 
lastOrd=2
        at __randomizedtesting.SeedInfo.seed([EC88337441443B17]:0)
        at 
app//org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:764)
        at 
app//org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:756)
Caused by: java.lang.IllegalStateException: only supports forward iteration: 
ord=4, lastOrd=2
        at 
__randomizedtesting.SeedInfo.seed([EC88337441443B17:98C4755B4CAE39A1]:0)
        at 
org.apache.lucene.codecs.KnnVectorsWriter$MergedVectorValues$MergedFloat32VectorValues.vectorValue(KnnVectorsWriter.java:359)
        at 
org.apache.lucene.util.quantization.ScalarQuantizer.fromVectorsAutoInterval(ScalarQuantizer.java:389)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.buildScalarQuantizer(Lucene99ScalarQuantizedVectorsWriter.java:684)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.mergeAndRecalculateQuantiles(Lucene99ScalarQuantizedVectorsWriter.java:662)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.mergeOneField(Lucene99ScalarQuantizedVectorsWriter.java:230)
        at 
org.apache.lucene.codecs.perfield.PerFieldKnnVectorsFormat$FieldsWriter.mergeOneField(PerFieldKnnVectorsFormat.java:121)
        at 
org.apache.lucene.codecs.KnnVectorsWriter.merge(KnnVectorsWriter.java:105)
        at 
org.apache.lucene.index.SegmentMerger.mergeVectorValues(SegmentMerger.java:271)
        at 
org.apache.lucene.index.SegmentMerger.mergeWithLogging(SegmentMerger.java:314)
        at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:158)
        at 
org.apache.lucene.index.IndexWriter.addIndexesReaderMerge(IndexWriter.java:3468)
        at 
org.apache.lucene.index.IndexWriter$AddIndexesMergeSource.merge(IndexWriter.java:3345)
        at 
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:668)
        at 
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:729)


FAILED:  
org.apache.lucene.codecs.lucene99.TestLucene99ScalarQuantizedVectorsFormat.testMergeStability

Error Message:
java.lang.IllegalStateException: only supports forward iteration: ord=4, 
lastOrd=2

Stack Trace:
java.lang.IllegalStateException: only supports forward iteration: ord=4, 
lastOrd=2
        at 
__randomizedtesting.SeedInfo.seed([EC88337441443B17:98C4755B4CAE39A1]:0)
        at 
org.apache.lucene.codecs.KnnVectorsWriter$MergedVectorValues$MergedFloat32VectorValues.vectorValue(KnnVectorsWriter.java:359)
        at 
org.apache.lucene.util.quantization.ScalarQuantizer.fromVectorsAutoInterval(ScalarQuantizer.java:389)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.buildScalarQuantizer(Lucene99ScalarQuantizedVectorsWriter.java:684)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.mergeAndRecalculateQuantiles(Lucene99ScalarQuantizedVectorsWriter.java:662)
        at 
org.apache.lucene.codecs.lucene99.Lucene99ScalarQuantizedVectorsWriter.mergeOneField(Lucene99ScalarQuantizedVectorsWriter.java:230)
        at 
org.apache.lucene.codecs.perfield.PerFieldKnnVectorsFormat$FieldsWriter.mergeOneField(PerFieldKnnVectorsFormat.java:121)
        at 
org.apache.lucene.codecs.KnnVectorsWriter.merge(KnnVectorsWriter.java:105)
        at 
org.apache.lucene.index.SegmentMerger.mergeVectorValues(SegmentMerger.java:271)
        at 
org.apache.lucene.index.SegmentMerger.mergeWithLogging(SegmentMerger.java:314)
        at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:158)
        at 
org.apache.lucene.index.IndexWriter.addIndexesReaderMerge(IndexWriter.java:3468)
        at 
org.apache.lucene.index.IndexWriter$AddIndexesMergeSource.merge(IndexWriter.java:3345)
        at 
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:668)
        at 
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:729)
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