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Apache Lucene open-source search software
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Python 0.9%
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Benjamin Trent 2ed60e8073
Ensure negative scores are not returned by vector similarity functions (#12727) 
We shouldn't ever return negative scores from vector similarity functions. Given vector panama and nearly antipodal float[] vectors, it is possible that cosine and (normalized) dot-product become slightly negative due to compounding floating point errors.

Since we don't want to make panama vector incredibly slow, we stick to float32 operations for now, and just snap to `0` if the score is negative after our correction.

closes: https://github.com/apache/lucene/issues/12700
 		2023-10-30 10:05:52 -04:00
.github Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
buildSrc GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
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dev-tools Add a little bit more hint to releaseWizard 2023-10-09 17:05:23 -03:00
gradle Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
help slight correction 2023-10-21 02:05:34 -04:00
lucene Ensure negative scores are not returned by vector similarity functions (#12727) 2023-10-30 10:05:52 -04:00
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.git-blame-ignore-revs GITHUB#12655: Add google java format upgrade tidy / regen to blame ignore 2023-10-11 16:15:42 -04:00
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CONTRIBUTING.md
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NOTICE.txt Cleanup NOTICE.txt (#12227) 2023-04-18 15:58:09 -04:00
README.md
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build.gradle GITHUB#12655: upgrade jacoco aggregation plugin (failed with gradle 8.x), change html output property. 2023-10-12 20:42:17 +02:00
gradlew GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
gradlew.bat GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
settings.gradle Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
versions.lock Added JMH micro-benchmarks submodule (#12663) 2023-10-12 20:25:34 +02:00
versions.props Upgrade to errorprone 2.18 (#12086) 2023-01-14 14:39:23 -05:00

README.md

Apache Lucene

Lucene Logo

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

Build Status

Online Documentation

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

Building

Basic steps:

  1. Install OpenJDK 17 or 18.
  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.

See Contributing Guide for details.

Contributing

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

Discussion and Support