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Posted to notifications@asterixdb.apache.org by AsterixDB Code Review <do...@asterix-gerrit.ics.uci.edu> on 2026/09/17 10:48:19 UTC
[L] Change in asterixdb[master]: [ASTERIXDB-3863][RT][STO] Emit VTree centroids grouped by parent
From Hongyu Shi <le...@gmail.com>:
Hongyu Shi has uploaded this change for review. ( https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/21816?usp=email )
Change subject: [ASTERIXDB-3863][RT][STO] Emit VTree centroids grouped by parent
......................................................................
[ASTERIXDB-3863][RT][STO] Emit VTree centroids grouped by parent
- user model changes: no
- storage format changes: no
- interface changes: yes
Details:
The VTree training operator does not emit centroid tuples in the order
the static-structure builder's contract requires: each level grouped by
parent, since the builder attaches children to parents by position and
never reads a tuple's parent id. The k-means operator emits each
level's tuples without grouping them. Most leaves therefore sit under
an interior centroid that is not their parent.
- The emitter groups each level's tuples by parent before emitting
them and renumbers centroid ids and parent references to match the
new order.
- The search cursor takes its frame factories at construction and keeps
one frame of each kind instead of building new ones for every page it
reads.
Co-Authored-By: Claude <no...@anthropic.com>
Change-Id: Ia064148455c722b07f234c762916505417d8c3d0
---
M asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.java
M asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/VTreeStaticStructureCreatorOperatorDescriptor.java
M asterixdb/asterix-runtime/src/test/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptorTest.java
M hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTree.java
M hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTreeSearchCursor.java
5 files changed, 172 insertions(+), 115 deletions(-)
git pull ssh://asterix-gerrit.ics.uci.edu:29418/asterixdb refs/changes/16/21816/1
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.java
index 6e1dd77..91cd5c0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.java
@@ -1565,6 +1565,17 @@
idOffset[L] = idOffset[L + 1] + sizeAbove;
}
+ int[][] parentByLevel = new int[maxLevel + 1][];
+ for (int L = 0; L <= maxLevel; L++) {
+ List<CentroidInfo> levelInfo = levelCentroids.get(L);
+ int size = levelInfo == null ? 0 : levelInfo.size();
+ parentByLevel[L] = new int[size];
+ for (int i = 0; i < size; i++) {
+ parentByLevel[L][i] = levelInfo.get(i).parentClusterId;
+ }
+ }
+ LevelOrder levelOrder = LevelOrder.groupByParent(parentByLevel);
+
// Walk levels bottom-up: levelCentroids key 0 (leaves) → key maxLevel (root).
// The tuple's treeLevel field keeps the existing convention: root = 0, leaf = maxLevel.
for (int L = 0; L <= maxLevel; L++) {
@@ -1573,11 +1584,12 @@
continue;
}
int treeLevel = maxLevel - L;
- int globalCentroidId = idOffset[L];
- for (CentroidInfo centroid : levelInfo) {
- createHierarchicalTuple(treeLevel, globalCentroidId, centroid.parentClusterId, centroid.embedding,
- appender, writer, ctx);
- globalCentroidId++;
+ int[] order = levelOrder.order[L];
+ for (int k = 0; k < order.length; k++) {
+ CentroidInfo centroid = levelInfo.get(order[k]);
+ int parent = L == maxLevel ? -1 : levelOrder.position[L + 1][centroid.parentClusterId];
+ createHierarchicalTuple(treeLevel, idOffset[L] + k, parent, centroid.embedding, appender, writer,
+ ctx);
}
}
}
@@ -1701,4 +1713,52 @@
}
}
+ /**
+ * The emission order of every level, grouped by parent. The static-structure builder attaches each
+ * level's runs of children to the parents by position, so a level must be emitted with the children
+ * of parent 0 first, then parent 1, and so on, where "parent k" means the k-th emitted tuple of the
+ * level above. Ties keep the k-means order.
+ */
+ static final class LevelOrder {
+ /** {@code order[L][k]} is the list index of the k-th emitted tuple of level {@code L}. */
+ final int[][] order;
+ /** {@code position[L][i]} is the emission position of list index {@code i} of level {@code L}. */
+ final int[][] position;
+
+ private LevelOrder(int[][] order, int[][] position) {
+ this.order = order;
+ this.position = position;
+ }
+
+ /**
+ * @param parentByLevel {@code parentByLevel[L][i]} is the list index in level {@code L + 1} of the
+ * parent of tuple {@code i} of level {@code L}; the last level is the root and
+ * its entries are ignored.
+ */
+ static LevelOrder groupByParent(int[][] parentByLevel) {
+ int levels = parentByLevel.length;
+ int[][] order = new int[levels][];
+ int[][] position = new int[levels][];
+ for (int L = levels - 1; L >= 0; L--) {
+ int size = parentByLevel[L].length;
+ Integer[] indices = new Integer[size];
+ for (int i = 0; i < size; i++) {
+ indices[i] = i;
+ }
+ if (L < levels - 1) {
+ int[] parentPosition = position[L + 1];
+ int[] parentOf = parentByLevel[L];
+ Arrays.sort(indices,
+ (a, b) -> Integer.compare(parentPosition[parentOf[a]], parentPosition[parentOf[b]]));
+ }
+ order[L] = new int[size];
+ position[L] = new int[size];
+ for (int k = 0; k < size; k++) {
+ order[L][k] = indices[k];
+ position[L][indices[k]] = k;
+ }
+ }
+ return new LevelOrder(order, position);
+ }
+ }
}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/VTreeStaticStructureCreatorOperatorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/VTreeStaticStructureCreatorOperatorDescriptor.java
index f4ef006..ed535a5 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/VTreeStaticStructureCreatorOperatorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/VTreeStaticStructureCreatorOperatorDescriptor.java
@@ -137,6 +137,7 @@
private IPointable clusterIdVal;
private IPointable centroidIdVal;
private Map<Integer, Integer> levelDistribution = null;
+ private final Map<Integer, Integer> lastParentByLevel = new HashMap<>();
private Map<String, Map<Integer, Integer>> clusterDistribution = null;
// Quantization-related instance variables
@@ -283,6 +284,7 @@
}
levelDistribution.put(level, levelDistribution.getOrDefault(level, 0) + 1);
+ checkGroupedByParent(level, clusterId, lastParentByLevel);
String levelKey = "Level_" + level;
Map<Integer, Integer> levelClusters =
@@ -691,4 +693,21 @@
}
}
+ /**
+ * The static-structure builder attaches each level's runs of children to the parents by position, so
+ * the tuples of a level must arrive grouped by parent in ascending parent order. Root tuples have no
+ * parent (-1) and are not checked.
+ */
+ static void checkGroupedByParent(int level, int parentClusterId, Map<Integer, Integer> lastParentByLevel)
+ throws HyracksDataException {
+ if (parentClusterId < 0) {
+ return;
+ }
+ Integer last = lastParentByLevel.put(level, parentClusterId);
+ // A tripwire on the producer's contract; the builder itself cannot check it.
+ if (last != null && parentClusterId < last) {
+ throw HyracksDataException.create(ILLEGAL_STATE, "Centroid tuples of level " + level
+ + " are not grouped by parent: parent " + parentClusterId + " arrived after parent " + last);
+ }
+ }
}
diff --git a/asterixdb/asterix-runtime/src/test/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptorTest.java b/asterixdb/asterix-runtime/src/test/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptorTest.java
index 60bfe38..d665295 100644
--- a/asterixdb/asterix-runtime/src/test/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptorTest.java
+++ b/asterixdb/asterix-runtime/src/test/java/org/apache/asterix/runtime/operators/HierarchicalKMeansPlusPlusCentroidsOperatorDescriptorTest.java
@@ -255,6 +255,54 @@
}
}
+ /**
+ * The static-structure creator derives per-parent counts from the stream and the builder files leaves
+ * into parents positionally, so within a level the tuples must arrive grouped by parent, parents in
+ * ascending order.
+ */
+ @Test
+ public void testEachLevelArrivesGroupedByParent() throws Exception {
+ List<CentroidTuple> tuples = parseAll(runOperator(7L, 36, 512, twoClusterVectors(40)));
+ Map<Integer, List<Integer>> parentsByLevel = new HashMap<>();
+ for (CentroidTuple t : tuples) {
+ if (t.treeLevel > 0) {
+ parentsByLevel.computeIfAbsent(t.treeLevel, k -> new java.util.ArrayList<>()).add(t.parentClusterId);
+ }
+ }
+ Assert.assertFalse("expected at least one non-root level", parentsByLevel.isEmpty());
+ for (Map.Entry<Integer, List<Integer>> e : parentsByLevel.entrySet()) {
+ List<Integer> parents = e.getValue();
+ for (int i = 1; i < parents.size(); i++) {
+ Assert.assertTrue(
+ "level " + e.getKey() + " tuples arrive with parents " + parents + ", not grouped by parent",
+ parents.get(i) >= parents.get(i - 1));
+ }
+ }
+ }
+
+ /**
+ * Reordering a level moves its tuples, so the level below must reference the parents' emission
+ * positions, not their k-means indices. Three levels: a root of two, a middle of three, six leaves.
+ */
+ @Test
+ public void testGroupByParentRemapsParentsToEmissionPositions() {
+ int[][] parentByLevel = { { 2, 0, 1, 2, 0, 1 }, { 1, 0, 1 }, { -1, -1 } };
+ HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.LevelOrder levelOrder =
+ HierarchicalKMeansPlusPlusCentroidsOperatorDescriptor.LevelOrder.groupByParent(parentByLevel);
+
+ Assert.assertArrayEquals(new int[] { 0, 1 }, levelOrder.order[2]);
+ // Middle: the child of root 0 first, then the two children of root 1 in k-means order.
+ Assert.assertArrayEquals(new int[] { 1, 0, 2 }, levelOrder.order[1]);
+ Assert.assertArrayEquals(new int[] { 1, 0, 2 }, levelOrder.position[1]);
+ // Leaves: grouped by the middle tuples' emission positions (old 1 -> 0, old 0 -> 1, old 2 -> 2).
+ Assert.assertArrayEquals(new int[] { 2, 5, 1, 4, 0, 3 }, levelOrder.order[0]);
+ int[] emittedParents = new int[6];
+ for (int k = 0; k < 6; k++) {
+ emittedParents[k] = levelOrder.position[1][parentByLevel[0][levelOrder.order[0][k]]];
+ }
+ Assert.assertArrayEquals(new int[] { 0, 0, 1, 1, 2, 2 }, emittedParents);
+ }
+
@Test
public void testClusteringSanityTwoSeparatedGroups() throws Exception {
List<double[]> vectors = twoClusterVectors(20);
diff --git a/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTree.java b/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTree.java
index 3fde481..afa4749 100644
--- a/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTree.java
+++ b/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTree.java
@@ -672,7 +672,8 @@
* @return Configured search cursor
*/
public IIndexCursor createSearchCursor(boolean exclusive, boolean fullScanMode) throws HyracksDataException {
- VTreeSearchCursor cursor = new VTreeSearchCursor();
+ VTreeSearchCursor cursor = new VTreeSearchCursor(tree.interiorFrameFactory, tree.leafFrameFactory,
+ tree.dataFrameFactory, tree.metadataFrameFactory);
configureCursor(cursor);
cursor.setFullScanMode(fullScanMode);
return cursor;
@@ -691,8 +692,6 @@
cursor.setRootPageId(tree.rootPage);
cursor.setDataBufferCache(tree.bufferCache, tree.getFileId());
}
- cursor.setFrameFactories(tree.interiorFrameFactory, tree.leafFrameFactory, tree.metadataFrameFactory,
- tree.dataFrameFactory);
}
public VTree getIndex() {
diff --git a/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTreeSearchCursor.java b/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTreeSearchCursor.java
index 8a1e1ae..e55d549 100644
--- a/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTreeSearchCursor.java
+++ b/hyracks-fullstack/hyracks/hyracks-storage-am-vtree/src/main/java/org/apache/hyracks/storage/am/vector/impls/VTreeSearchCursor.java
@@ -47,7 +47,7 @@
import org.apache.hyracks.storage.common.buffercache.IBufferCache;
import org.apache.hyracks.storage.common.buffercache.ICachedPage;
import org.apache.hyracks.storage.common.file.BufferedFileHandle;
-import org.apache.hyracks.util.annotations.AiProvenance;
+import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
@@ -63,10 +63,8 @@
private IBufferCache bufferCache;
private int fileId;
private int rootPageId;
- private ITreeIndexFrameFactory interiorFrameFactory;
- private ITreeIndexFrameFactory leafFrameFactory;
- private ITreeIndexFrameFactory metadataFrameFactory;
- private ITreeIndexFrameFactory dataFrameFactory;
+ private final ITreeIndexFrameFactory interiorFrameFactory;
+ private final ITreeIndexFrameFactory leafFrameFactory;
// Data access fields (for memory components: VBC; for disk: same as bufferCache)
private IBufferCache dataBufferCache;
@@ -90,8 +88,11 @@
private boolean isOpen;
private ITupleReference currentTuple;
private ICachedPage currentPage;
- private IVTreeDataFrame dataFrame;
- private ITreeIndexTupleReference frameTuple;
+ private final IVTreeInteriorFrame interiorFrame;
+ private final IVTreeLeafFrame leafFrame;
+ private final IVTreeDataFrame dataFrame;
+ private final IVTreeMetadataFrame metadataFrame;
+ private final ITreeIndexTupleReference frameTuple;
/* Position in current data page (0-based, next tuple to read) */
private int currentTupleIndex;
/* Total tuples in current data page */
@@ -138,7 +139,15 @@
private double[] quantizedQueryVector; // Quantized query vector (null = non-quantized)
private IVTreeQuantizer quantizer; // Quantizer instance (null = non-quantized)
- public VTreeSearchCursor() {
+ public VTreeSearchCursor(ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexFrameFactory leafFrameFactory,
+ ITreeIndexFrameFactory dataFrameFactory, ITreeIndexFrameFactory metadataFrameFactory) {
+ this.interiorFrameFactory = interiorFrameFactory;
+ this.leafFrameFactory = leafFrameFactory;
+ this.interiorFrame = (IVTreeInteriorFrame) interiorFrameFactory.createFrame();
+ this.leafFrame = (IVTreeLeafFrame) leafFrameFactory.createFrame();
+ this.dataFrame = (IVTreeDataFrame) dataFrameFactory.createFrame();
+ this.metadataFrame = (IVTreeMetadataFrame) metadataFrameFactory.createFrame();
+ this.frameTuple = dataFrame.createTupleReference();
this.isOpen = false;
this.currentTupleIndex = 0;
this.tupleCount = 0;
@@ -192,14 +201,6 @@
this.rootPageId = rootPageId;
}
- public void setFrameFactories(ITreeIndexFrameFactory interiorFrameFactory, ITreeIndexFrameFactory leafFrameFactory,
- ITreeIndexFrameFactory metadataFrameFactory, ITreeIndexFrameFactory dataFrameFactory) {
- this.interiorFrameFactory = interiorFrameFactory;
- this.leafFrameFactory = leafFrameFactory;
- this.metadataFrameFactory = metadataFrameFactory;
- this.dataFrameFactory = dataFrameFactory;
- }
-
public void setQueryVector(double[] queryVector) {
this.queryVector = queryVector;
}
@@ -380,8 +381,7 @@
throw HyracksDataException.create(new IllegalStateException("No more tuples"));
}
- // Position on next tuple using frameTuple
- if (this.dataFrame != null && this.frameTuple != null) {
+ if (this.currentPage != null) {
this.frameTuple.resetByTupleIndex(this.dataFrame, currentTupleIndex);
this.currentTuple = this.frameTuple;
}
@@ -437,7 +437,7 @@
// Step 4: Open cluster 0
this.currentSequentialClusterIndex = 0;
- openClusterByDirectoryPage(this.firstDirectoryPageId);
+ openClusterByDirectoryPage(this.firstDirectoryPageId, 0);
this.clustersProbed = 1;
// Create ClusterSearchResult for first cluster (for LSM layer to access)
@@ -463,7 +463,6 @@
ICachedPage page = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, currentPageId));
try {
page.acquireReadLatch();
- IVTreeInteriorFrame interiorFrame = createInteriorFrame();
interiorFrame.setPage(page);
if (interiorFrame.getLevel() == 0) {
@@ -499,7 +498,6 @@
ICachedPage leafPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, leafPageId));
try {
leafPage.acquireReadLatch();
- IVTreeLeafFrame leafFrame = createLeafFrame();
leafFrame.setPage(leafPage);
int tupleCount = leafFrame.getTupleCount();
@@ -528,20 +526,17 @@
* Open a cluster by its directory (metadata) page ID.
* Used by full-scan mode for sequential cluster iteration.
*/
- private void openClusterByDirectoryPage(long directoryPageId) throws HyracksDataException {
+ private void openClusterByDirectoryPage(long directoryPageId, int centroidId) throws HyracksDataException {
// Log previous cluster summary if we have data
this.targetMetadataPageId = directoryPageId;
- // Guard: directoryPageId=-1 means empty cluster (no data assigned during bulk loading)
+ // A bulk load leaves the directory pointer unassigned on a leaf cluster that received no record.
if (directoryPageId == -1) {
if (!fullScanMode) {
- // In query mode a -1 sentinel usually means the directory page could not be
- // resolved in this component (e.g., a corrupt/wrong component root made the
- // cluster unreachable) — flag it instead of silently yielding an empty cluster.
- // Merge (full-scan) mode legitimately sees -1 for empty clusters, so stay quiet there.
emptyClustersInQueryMode++;
- LOGGER.warn("VTreeSearchCursor: -1 directory page sentinel in query mode (fileId={}, rootPageId={}); "
- + "treating cluster as empty", fileId, rootPageId);
+ LOGGER.log(Level.TRACE,
+ "cluster {} has no directory page: no record was loaded into it (fileId={}, rootPageId={})",
+ centroidId, fileId, rootPageId);
}
markCurrentClusterEmpty();
return;
@@ -551,21 +546,16 @@
ICachedPage dirPage = dataBufferCache.pin(BufferedFileHandle.getDiskPageId(dataFileId, (int) directoryPageId));
try {
dirPage.acquireReadLatch();
- IVTreeMetadataFrame metadataFrame = createMetadataFrame();
metadataFrame.setPage(dirPage);
int metadataTupleCount = metadataFrame.getTupleCount();
+ // A memory component pre-allocates one directory page per cluster and a flush copies it as is,
+ // so a cluster with no inserts has a directory page with no entries.
if (metadataTupleCount == 0) {
if (!fullScanMode) {
- // The directory page resolved but has no data-page entries. In query mode that is a
- // recall hole (an expected-non-empty cluster yields nothing) and a sign of an
- // inconsistent component; surface it consistently with the -1 case above instead of
- // returning empty silently.
emptyClustersInQueryMode++;
- LOGGER.warn(
- "VTreeSearchCursor: directory page {} has no metadata entries in query mode "
- + "(fileId={}, rootPageId={}); treating cluster as empty",
- directoryPageId, fileId, rootPageId);
+ LOGGER.log(Level.TRACE, "cluster {} directory page {} has no data pages (fileId={}, rootPageId={})",
+ centroidId, directoryPageId, fileId, rootPageId);
}
markCurrentClusterEmpty();
return;
@@ -610,7 +600,7 @@
}
long nextDirectoryPageId = allDirectoryPageIds.get(currentSequentialClusterIndex);
- openClusterByDirectoryPage(nextDirectoryPageId);
+ openClusterByDirectoryPage(nextDirectoryPageId, currentSequentialClusterIndex);
// Create ClusterSearchResult for this sequential cluster
// In full-scan mode, we don't have centroid info, but we have the directory page
@@ -674,7 +664,7 @@
// getMetadataPageIdFromCluster handles both memory (centroidDirPageMap)
// and disk (leaf page traversal) correctly.
long localDirPageId = getMetadataPageIdFromCluster(cluster);
- openClusterByDirectoryPage(localDirPageId);
+ openClusterByDirectoryPage(localDirPageId, cluster.centroidId);
this.currentClusterResult = cluster;
this.clustersProbed++;
@@ -718,7 +708,6 @@
dataBufferCache.pin(BufferedFileHandle.getDiskPageId(dataFileId, (int) targetMetadataPageId));
try {
metadataPage.acquireReadLatch();
- IVTreeMetadataFrame metadataFrame = createMetadataFrame();
metadataFrame.setPage(metadataPage);
int tupleCount = metadataFrame.getTupleCount();
@@ -750,10 +739,7 @@
page.acquireReadLatch();
latched = true;
- // Initialize data frame
- this.dataFrame = createDataFrame();
this.dataFrame.setPage(page);
- this.frameTuple = this.dataFrame.createTupleReference();
this.tupleCount = this.dataFrame.getTupleCount();
this.currentTupleIndex = 0;
this.currentPage = page;
@@ -773,7 +759,7 @@
* @return true if successfully moved to next page, false if no more pages
*/
private boolean moveToNextDataPage() throws HyracksDataException {
- if (dataFrame == null) {
+ if (currentPage == null) {
return false;
}
@@ -813,21 +799,12 @@
}
/**
- * Position the cursor on an empty cluster: release the page of the cluster being abandoned and drop the
- * frame that was reading it.
- * <p>
- * Clearing {@code dataFrame}/{@code frameTuple} is what makes this safe. Leaving them pointing at the
- * previous cluster's page lets the next {@code hasNext()} fall into {@link #moveToNextDataPage()}, which
- * reads {@code dataFrame.getNextPage()} off that stale frame and silently resumes the abandoned cluster's
- * data-page chain. That is reachable in practice because the LSM layer re-points this cursor mid-cluster
- * during cross-component cluster synchronization ({@code openClusterByResult}), so a cluster is not
- * necessarily drained to the end of its chain before the next one is opened.
+ * Position the cursor on an empty cluster. {@code currentPage} is the only sign of an open page, so once
+ * it is closed neither {@code hasNext()} nor {@link #moveToNextDataPage()} can follow the abandoned
+ * cluster's data-page chain through the frame that last read it.
*/
- @AiProvenance(agent = AiProvenance.Agent.CLAUDE_OPUS_5, tool = AiProvenance.Tool.CLAUDE_CODE_UI, contributionKind = AiProvenance.ContributionKind.GENERATED)
private void markCurrentClusterEmpty() throws HyracksDataException {
closeCurrentPage();
- this.dataFrame = null;
- this.frameTuple = null;
this.currentDataPageId = -1;
this.tupleCount = 0;
this.currentTupleIndex = 0;
@@ -862,28 +839,6 @@
}
/**
- * Create a metadata frame instance using the frame factory.
- */
- private IVTreeMetadataFrame createMetadataFrame() {
- if (metadataFrameFactory == null) {
- // TODO(vector-errors): uncoded IllegalStateException -> reaches the user as "Internal error".
- throw new IllegalStateException("Metadata frame factory not set");
- }
- return (IVTreeMetadataFrame) metadataFrameFactory.createFrame();
- }
-
- /**
- * Create a data frame instance using the frame factory.
- */
- private IVTreeDataFrame createDataFrame() {
- if (dataFrameFactory == null) {
- // TODO(vector-errors): uncoded IllegalStateException -> reaches the user as "Internal error".
- throw new IllegalStateException("Data frame factory not set");
- }
- return (IVTreeDataFrame) dataFrameFactory.createFrame();
- }
-
- /**
* Get metadata page ID from cluster search result.
*
* For memory components: uses centroidDirPageMap for O(1) lookup (the map
@@ -958,8 +913,8 @@
try {
page.acquireReadLatch();
- // Use leaf frame to check page level (isLeaf works on any page type)
- IVTreeLeafFrame lf = createLeafFrame();
+ // isLeaf reads the page level, which every page type carries.
+ IVTreeLeafFrame lf = leafFrame;
lf.setPage(page);
if (lf.isLeaf()) {
@@ -978,8 +933,7 @@
}
}
} else {
- // Interior page: enqueue all children
- IVTreeInteriorFrame intFrame = createInteriorFrame();
+ IVTreeInteriorFrame intFrame = interiorFrame;
intFrame.setPage(page);
int tc = intFrame.getTupleCount();
@@ -1001,33 +955,10 @@
}
}
- /**
- * Create frame instances.
- */
- private IVTreeInteriorFrame createInteriorFrame() {
- if (interiorFrameFactory == null) {
- // TODO(vector-errors): uncoded IllegalStateException -> reaches the user as "Internal error".
- throw new IllegalStateException("Interior frame factory not set");
- }
- return (IVTreeInteriorFrame) interiorFrameFactory.createFrame();
- }
-
- private IVTreeLeafFrame createLeafFrame() {
- if (leafFrameFactory == null) {
- // TODO(vector-errors): uncoded IllegalStateException -> reaches the user as "Internal error".
- throw new IllegalStateException("Leaf frame factory not set");
- }
- return (IVTreeLeafFrame) leafFrameFactory.createFrame();
- }
-
@Override
protected void doClose() throws HyracksDataException {
if (isOpen && emptyClustersInQueryMode > 0) {
- // Aggregate recall-hole summary for this search: how many probed clusters yielded nothing in
- // query mode. Non-zero here means candidates were missed (usually an inconsistent component).
- LOGGER.warn(
- "VTreeSearchCursor: {} of {} probed clusters were empty in query mode "
- + "(fileId={}, rootPageId={})",
+ LOGGER.log(Level.TRACE, "{} of {} probed clusters were empty (fileId={}, rootPageId={})",
emptyClustersInQueryMode, clustersProbed, fileId, rootPageId);
}
if (isOpen) {
--
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Gerrit-MessageType: newchange
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Change-Id: Ia064148455c722b07f234c762916505417d8c3d0
Gerrit-Change-Number: 21816
Gerrit-PatchSet: 1
Gerrit-Owner: Hongyu Shi <le...@gmail.com>