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Apache Lucene open-source search software
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Nhat Nguyen b42fd8e479
Avoid wrap readers without soft-deletes (#13588) 
I analyzed a heap dump of Elasticsearch where FixedBitSet uses more than 
1GB of memory. Most of these FixedBitSets are used by soft-deletes 
reader wrappers, even though these segments have no deletes at all. I
believe these segments previously had soft-deletes, but these deletes
were pruned by merges. The reason we wrap soft-deletes is that the
soft-deletes field exists. Since these segments had soft-deletes
previously, we carried the field-infos into the new segment. Ideally, we
should have ways to check whether the returned docValues iterator is
empty or not so that we can avoid allocating FixedBitSet completely, or
we should prune fields without values after merges.
 		2024-07-18 22:47:44 -07:00
.github Java 22 has been released, so drop -ea from smoketester gh workflow matrix. 2024-06-06 15:45:27 +02:00
build-tools Correct the default checksum for artifacts to be sha512. #13484 2024-06-18 09:43:29 +02:00
dev-docs a bit of clarification about GitHub Milestone 2022-08-28 13:52:58 +09:00
dev-tools DOAP changes for release 9.11.1 2024-06-27 15:40:55 +02:00
gradle Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
help Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
lucene Avoid wrap readers without soft-deletes (#13588) 2024-07-18 22:47:44 -07:00
.asf.yaml .asf.yaml 2022-08-16 20:02:47 +09:00
.dir-locals.el LUCENE-9322: Add Lucene90 codec, including VectorFormat 2020-10-18 07:49:36 -04:00
.git-blame-ignore-revs GITHUB#12655: Add google java format upgrade tidy / regen to blame ignore 2023-10-11 16:15:42 -04:00
.gitattributes Add versions.toml to .gitattributes and normalize line endings to lf. #13484 2024-06-18 14:25:40 +02:00
.gitignore LUCENE-9920: Remove binary gradle-wrapper.jar from the repository 2021-04-10 16:08:39 +02:00
.hgignore LUCENE-2792: add FST impl 2010-12-12 15:36:08 +00:00
.lift.toml Disable liftbot, we have our own tools 2022-05-05 22:27:57 +02:00
CONTRIBUTING.md equivocate about IntelliJ test runner 2024-06-10 08:40:38 -04:00
LICENSE.txt LUCENE-10163 Move LICENSE and NOTICE file to top level (#388) 2021-10-18 01:24:11 +02:00
NOTICE.txt Cleanup NOTICE.txt (#12227) 2023-04-18 15:58:09 -04:00
README.md Make Gradle dashboard easy to find by adding a badge (#13476) 2024-07-01 09:09:51 +01:00
build.gradle Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
gradlew Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
gradlew.bat Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
settings.gradle Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
versions.lock Gradle build: cleanup of dependency resolution and consolidation of dependency versions (#13484) 2024-06-17 09:49:21 +02:00
versions.toml Add versions.toml to .gitattributes and normalize line endings to lf. #13484 2024-06-18 14:25:40 +02:00

README.md

Apache Lucene

Lucene Logo

Apache Lucene is a high-performance, full-featured text search engine library written in Java.

Build Status Revved up by Develocity

Online Documentation

This README file only contains basic setup instructions. For more comprehensive documentation, visit:

Building

Basic steps:

  1. Install OpenJDK 21.
  2. Clone Lucene's git repository (or download the source distribution).
  3. Run gradle launcher script (gradlew).

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.

Contributing

Bug fixes, improvements and new features are always welcome! Please review the Contributing to Lucene Guide for information on contributing.

  • Additional Developer Documentation: dev-docs/

Discussion and Support