Deprecate COSINE VectorSimilarity function

.github/workflows/run-checks-gradle-upgrade.yml

@@ -0,0 +1,88 @@
+name: "Run checks: gradle upgrade"
+
+on:
+  workflow_dispatch:
+
+  pull_request:
+    branches:
+      - 'main'
+      - 'branch_9x'
+    paths:
+      - '.github/workflows/run-checks-gradle-upgrade.yml'
+      - 'gradle/wrapper/**'
+
+  push:
+    branches:
+      - 'main'
+      - 'branch_9x'
+    paths:
+      - '.github/workflows/run-checks-gradle-upgrade.yml'
+      - 'gradle/wrapper/**'
+
+env:
+  GRADLE_ENTERPRISE_ACCESS_KEY: ${{ secrets.GE_ACCESS_TOKEN }}
+
+jobs:
+  gradleSanityCheck:
+    name: "Run tasks (java: ${{ matrix.java-version }}, alt-java: ${{ matrix.uses-alt-java }})"
+    timeout-minutes: 30
+
+    strategy:
+      matrix:
+        os: [ ubuntu-latest ]
+        java-version: [ '22' ]
+        uses-alt-java: [ true, false ]
+
+    runs-on: ${{ matrix.os }}
+
+    env:
+      ALT_JAVA_DIR: /tmp/alt-java
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/prepare-for-build
+        with:
+          java-version: ${{ matrix.java-version }}
+
+      - name: Set up RUNTIME_JAVA_HOME variable
+        if: ${{ matrix.uses-alt-java }}
+        run: |
+          echo "All installed JDKs:"
+          set | grep "JAVA"
+
+          echo "Gradle's 'RUNTIME_JAVA_HOME' JDK:"
+          RUNTIME_JAVA_HOME_VAR=JAVA_HOME_`echo ${{ matrix.java-version }} | egrep --only "[0-9]+"`_X64
+          echo ${RUNTIME_JAVA_HOME_VAR} points at ${!RUNTIME_JAVA_HOME_VAR}
+
+          # Copy the JDK from its default location to /tmp so that it appears different to gradle.
+          rsync -av ${!RUNTIME_JAVA_HOME_VAR}/ ${{ env.ALT_JAVA_DIR }}/
+
+          # This sets the environment variable and makes it available for subsequent job steps.
+          # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-environment-variable
+          echo "RUNTIME_JAVA_HOME=${{ env.ALT_JAVA_DIR }}" >> "$GITHUB_ENV"
+
+      - run: ./gradlew -p lucene/core check -x test
+
+      - name: ./gradlew regenerate
+        run: |
+          # add this package for generateEmojiTokenizationTestChecksumLoad.
+          sudo apt-get install libwww-perl
+          ./gradlew regenerate -x generateUAX29URLEmailTokenizerInternal --rerun-tasks
+          if [ ! -z "$(git status --porcelain)" ]; then 
+            echo ":warning: **regenerateleft local checkout in modified state**" >> $GITHUB_STEP_SUMMARY 
+            echo '```' >> $GITHUB_STEP_SUMMARY
+            git status --porcelain >> $GITHUB_STEP_SUMMARY
+            echo '```' >> $GITHUB_STEP_SUMMARY
+            git reset --hard && git clean -xfd .
+          fi
+
+      - run: ./gradlew testOpts
+      - run: ./gradlew helpWorkflow
+      - run: ./gradlew licenses updateLicenses
+      - run: ./gradlew tidy
+      - run: ./gradlew check -x test
+      - run: ./gradlew assembleRelease mavenToLocal
+
+      # Conserve resources: only run these in non-alt-java mode.
+      - run: ./gradlew getGeoNames
+        if: ${{ !matrix.uses-alt-java }}

.github/workflows/run-nightly-smoketester.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        java-version: [ '21', '22-ea' ]
+        java-version: [ '21', '22' ]
 
     runs-on: ${{ matrix.os }}
 

CONTRIBUTING.md

@@ -58,7 +58,7 @@ In case your contribution fixes a bug, please create a new test case that fails
 
 ### IDE support
 
-- *IntelliJ* - IntelliJ idea can import and build gradle-based projects out of the box.
+- *IntelliJ* - IntelliJ idea can import and build gradle-based projects out of the box. However please note that it will default to running tests by calling the gradle wrapper, and while this works, it is for some reason quite slow. Instead we recommend configuring IntelliJ to use its own built-in test runner. You can modify this config (in 2024 version) by navigating to settings for Build Execution & Deployment/Build Tools/Gradle (under File/Settings menu on some platforms) and selecting "Build and Run using: IntelliJ IDEA" and "Run Tests using: IntelliJ IDEA".
 - *Eclipse*  - Basic support ([help/IDEs.txt](https://github.com/apache/lucene/blob/main/help/IDEs.txt#L7)).
 - *Netbeans* - Not tested.
 

README.md

@@ -31,8 +31,8 @@ comprehensive documentation, visit:
 
 - Latest Releases: <https://lucene.apache.org/core/documentation.html>
 - Nightly: <https://ci-builds.apache.org/job/Lucene/job/Lucene-Artifacts-main/javadoc/>
+- New contributors should start by reading [Contributing Guide](./CONTRIBUTING.md)
 - Build System Documentation: [help/](./help/)
-- Developer Documentation: [dev-docs/](./dev-docs/)
 - Migration Guide: [lucene/MIGRATE.md](./lucene/MIGRATE.md)
 
 ## Building
@@ -45,15 +45,15 @@ comprehensive documentation, visit:
 
 We'll assume that you know how to get and set up the JDK - if you don't, then we suggest starting at https://jdk.java.net/ and learning more about Java, before returning to this README.
 
-See [Contributing Guide](./CONTRIBUTING.md) for details.
-
 ## Contributing
 
 Bug fixes, improvements and new features are always welcome!
 Please review the [Contributing to Lucene
 Guide](./CONTRIBUTING.md) for information on
 contributing.
 
+- Additional Developer Documentation: [dev-docs/](./dev-docs/)
+
 ## Discussion and Support
 
 - [Users Mailing List](https://lucene.apache.org/core/discussion.html#java-user-list-java-userluceneapacheorg)

buildSrc/src/main/java/org/apache/lucene/gradle/WrapperDownloader.java

@@ -21,6 +21,7 @@
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.net.URI;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -55,8 +56,8 @@ public static void main(String[] args) {
 
   public static void checkVersion() {
     int major = Runtime.version().feature();
-    if (major != 21) {
-      throw new IllegalStateException("java version must be 21, your version: " + major);
+    if (major != 21 && major != 22) {
+      throw new IllegalStateException("java version must be 21 or 22, your version: " + major);
     }
   }
 
@@ -86,7 +87,7 @@ public void run(Path destination) throws IOException, NoSuchAlgorithmException {
       }
     }
 
-    URL url = new URL("https://raw.githubusercontent.com/gradle/gradle/v" + wrapperVersion + "/gradle/wrapper/gradle-wrapper.jar");
+    URL url = URI.create("https://raw.githubusercontent.com/gradle/gradle/v" + wrapperVersion + "/gradle/wrapper/gradle-wrapper.jar").toURL();
     System.err.println("Downloading gradle-wrapper.jar from " + url);
 
     // Zero-copy save the jar to a temp file

dev-tools/doap/lucene.rdf

@@ -67,6 +67,13 @@
     </maintainer>
 
     <!-- NOTE: please insert releases in numeric order, NOT chronologically. -->
+    <release>
+       <Version>
+         <name>lucene-9.11.0</name>
+         <created>2024-06-06</created>
+         <revision>9.11.0</revision>
+       </Version>
+    </release>
     <release>
        <Version>
          <name>lucene-9.10.0</name>

dev-tools/scripts/addBackcompatIndexes.py

@@ -40,6 +40,7 @@ def create_and_add_index(source, indextype, index_version, current_version, temp
       'cfs': 'index',
       'nocfs': 'index',
       'sorted': 'sorted',
+      'int8_hnsw': 'int8_hnsw',
       'moreterms': 'moreterms',
       'dvupdates': 'dvupdates',
       'emptyIndex': 'empty'
@@ -60,6 +61,7 @@ def create_and_add_index(source, indextype, index_version, current_version, temp
     'cfs': 'testCreateCFS',
     'nocfs': 'testCreateNoCFS',
     'sorted': 'testCreateSortedIndex',
+    'int8_hnsw': 'testCreateInt8HNSWIndices',
     'moreterms': 'testCreateMoreTermsIndex',
     'dvupdates': 'testCreateIndexWithDocValuesUpdates',
     'emptyIndex': 'testCreateEmptyIndex'
@@ -204,6 +206,7 @@ def main():
   current_version = scriptutil.Version.parse(scriptutil.find_current_version())
   create_and_add_index(source, 'cfs', c.version, current_version, c.temp_dir)
   create_and_add_index(source, 'nocfs', c.version, current_version, c.temp_dir)
+  create_and_add_index(source, 'int8_hnsw', c.version, current_version, c.temp_dir)
   should_make_sorted =     current_version.is_back_compat_with(c.version) \
                        and (c.version.major > 6 or (c.version.major == 6 and c.version.minor >= 2))
   if should_make_sorted:

gradle/testing/alternative-jdk-support.gradle

@@ -50,7 +50,7 @@ if (jvmGradle != jvmCurrent) {
       doFirst {
 
         def jvmInfo = { JavaInfo javaInfo ->
-          JvmInstallationMetadata jvmMetadata = jvmDetector.getMetadata(new InstallationLocation(javaInfo.javaHome, "specific path"))
+          JvmInstallationMetadata jvmMetadata = jvmDetector.getMetadata(InstallationLocation.userDefined(javaInfo.javaHome, "specific path"))
           return "${jvmMetadata.languageVersion} (${jvmMetadata.displayName} ${jvmMetadata.runtimeVersion}, home at: ${jvmMetadata.javaHome})"
         }
 
@@ -88,6 +88,6 @@ if (jvmGradle != jvmCurrent) {
 // Set up root project's properties.
 rootProject.ext.runtimeJavaExecutable = jvmCurrent.javaExecutable
 rootProject.ext.runtimeJavaHome = jvmCurrent.javaHome
-rootProject.ext.runtimeJavaVersion = jvmDetector.getMetadata(new InstallationLocation(jvmCurrent.javaHome, "specific path")).getLanguageVersion()
+rootProject.ext.runtimeJavaVersion = jvmDetector.getMetadata(InstallationLocation.userDefined(jvmCurrent.javaHome, "specific path")).getLanguageVersion()
 rootProject.ext.usesAltJvm = (jvmGradle != jvmCurrent);
 

gradle/validation/check-environment.gradle

@@ -22,7 +22,7 @@ import org.gradle.util.GradleVersion
 
 configure(rootProject) {
   ext {
-    expectedGradleVersion = '8.4'
+    expectedGradleVersion = '8.8'
     hasJavaFlightRecorder = ModuleLayer.boot().findModule('jdk.jfr').map(this.class.module::canRead).orElse(false)
   }
 

gradle/wrapper/gradle-wrapper.jar.sha256

@@ -1 +1 @@
-0336f591bc0ec9aa0c9988929b93ecc916b3c1d52aed202c7381db144aa0ef15
+cb0da6751c2b753a16ac168bb354870ebb1e162e9083f116729cec9c781156b8

gradle/wrapper/gradle-wrapper.jar.version

@@ -1 +1 @@
-8.4.0
+8.8.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

lucene/CHANGES.txt

@@ -110,6 +110,8 @@ API Changes
   I/O for top-level disjunctions. Weight#bulkScorer() still exists for compatibility, but delegates
   to ScorerSupplier#bulkScorer(). (Adrien Grand)
 
+* GITHUB#13410: Removed Scorer#getWeight (Sanjay Dutt, Adrien Grand)
+
 New Features
 ---------------------
 
@@ -202,6 +204,10 @@ Changes in Backwards Compatibility Policy
 Other
 ---------------------
 
+* GITHUB#13459: Merges all immutable attributes in FieldInfos.FieldNumbers into one Hashmap saving
+  memory when writing big indices. Fixes an exotic bug when calling clear where not all attributes
+  were cleared. (Ignacio Vera)
+
 * LUCENE-10376: Roll up the loop in VInt/VLong in DataInput. (Guo Feng)
 
 * LUCENE-10253: The @BadApple annotation has been removed from the test
@@ -233,13 +239,51 @@ Other
 
 * GITHUB#13332: Improve MissingDoclet linter to check records correctly. (Uwe Schindler)
 
+======================== Lucene 9.12.0 =======================
+
+API Changes
+---------------------
+
+* GITHUB#13281: Mark COSINE VectorSimilarityFunction as deprecated. (Pulkit Gupta)
+
+New Features
+---------------------
+(No changes)
+
+Improvements
+---------------------
+(No changes)
+
+Optimizations
+---------------------
+
+* GITHUB#13439: Avoid unnecessary memory allocation in PackedLongValues#Iterator. (Zhang Chao)
+
+* GITHUB##13425: Rewrite SortedNumericDocValuesRangeQuery to MatchNoDocsQuery when the upper bound is smaller than the
+  lower bound. (Ioana Tagirta)
+
+* GITHUB#13322: Implement Weight#count for vector values in the FieldExistsQuery. (Pan Guixin)
+
+* GITHUB#13454: MultiTermQuery returns null ScoreSupplier in cases where
+  no query terms are present in the index segment (Mayya Sharipova)
+
+Bug Fixes
+---------------------
+(No changes)
+
+Other
+--------------------
+(No changes)
+
 ======================== Lucene 9.11.0 =======================
 
 API Changes
 ---------------------
 
 * GITHUB#13145: Deprecate ByteBufferIndexInput as it will be removed in Lucene 10.0. (Uwe Schindler)
 
+* GITHUB#13281: Mark COSINE VectorSimilarityFunction as deprecated. (Pulkit Gupta)
+
 * GITHUB#13422: an explicit dependency on the HPPC library is removed in favor of an internal repackaged copy in
   oal.internal.hppc. If you relied on HPPC as a transitive dependency, you'll have to add it to your project explicitly.
   The HPPC classes now bundled in Lucene core are internal and will have restricted access in future releases, please do
@@ -274,6 +318,12 @@ New Features
 * GITHUB#13181: Add new VectorScorer interface to vector value iterators. This allows for vector codecs to supply
   simpler and more optimized vector scoring when iterating vector values directly. (Ben Trent)
 
+* GITHUB#13414: Counts are always available in the result when using taxonomy facets. (Stefan Vodita)
+
+* GITHUB#13445: Add new option when calculating scalar quantiles. The new option of setting `confidenceInterval` to
+  `0` will now dynamically determine the quantiles through a grid search over multiple quantiles calculated
+  by multiple intervals. (Ben Trent)
+
 Improvements
 ---------------------
 
@@ -309,6 +359,8 @@ Improvements
 
 * GITHUB#13276: UnifiedHighlighter: new 'passageSortComparator' option to allow sorting other than offset order. (Seunghan Jung)
 
+* GITHUB#13429: Hunspell: speed up "compress"; minimize the number of the generated entries; don't even consider "forbidden" entries anymore (Peter Gromov)
+
 Optimizations
 ---------------------
 
@@ -355,16 +407,18 @@ Optimizations
 
 * GITHUB#13327: Reduce memory usage of field maps in FieldInfos and BlockTree TermsReader. (Bruno Roustant, David Smiley)
 
+* GITHUB#13339: Add a MemorySegment Vector scorer - for scoring without copying on-heap (Chris Hegarty)
+
 * GITHUB#13368: Replace Map<Integer, Object> by primitive IntObjectHashMap. (Bruno Roustant)
 
 * GITHUB#13392: Replace Map<Long, Object> by primitive LongObjectHashMap. (Bruno Roustant)
 
-* GITHUB#13339: Add a MemorySegment Vector scorer - for scoring without copying on-heap (Chris Hegarty)
-
 * GITHUB#13400: Replace Set<Integer> by IntHashSet and Set<Long> by LongHashSet. (Bruno Roustant)
 
 * GITHUB#13406: Replace List<Integer> by IntArrayList and List<Long> by LongArrayList. (Bruno Roustant)
 
+* GITHUB#13420: Replace Map<Character> by CharObjectHashMap and Set<Character> by CharHashSet. (Bruno Roustant)
+
 Bug Fixes
 ---------------------
 
@@ -400,6 +454,8 @@ Bug Fixes
 
 * GITHUB#13376: Fix integer overflow exception in postings encoding as group-varint. (Zhang Chao, Guo Feng)
 
+* GITHUB#13421: Fixes TestOrdinalMap.testRamBytesUsed for multiple default PackedInts.NullReader instances. (Amir Raza)
+
 Build
 ---------------------
 

lucene/MIGRATE.md

@@ -779,3 +779,17 @@ to manage the indexed data on their own and create new `Facet` implementations t
 The `Weight#scorerSupplier` method is now declared abstract, compelling child classes to implement the ScorerSupplier 
 interface. Additionally, `Weight#scorer` is now declared final, with its implementation being delegated to 
 `Weight#scorerSupplier` for the scorer.
+
+### Reference to `weight` is removed from Scorer (GITHUB#13410)
+
+The `weight` has been removed from the Scorer class. Consequently, the constructor, `Scorer(Weight)`,and a getter, 
+`Scorer#getWeight`, has also been eliminated. References to weight have also been removed from nearly all the subclasses 
+of Scorer, including ConstantScoreScorer, TermScorer, and others.
+
+Additionally, several APIs have been modified to remove the weight reference, as it is no longer necessary. 
+Specifically, the method `FunctionValues#getScorer(Weight weight, LeafReaderContext readerContext)` has been updated to 
+`FunctionValues#getScorer(LeafReaderContext readerContext)`.
+
+Callers must now keep track of the Weight instance that created the Scorer if they need it, instead of relying on 
+Scorer.
+