Using Opensearch kNN in Java

OpenSearch Client Libraries
2

For those experiencing the same issue, if you use Gradle, it downloads the library as a .zip file. While I am not entirely sure if this resolves the problem, adding unzipping modules seems to help:

configurations {
	knnZip
}

dependencies {
	knnZip 'org.opensearch.plugin:opensearch-knn:2.15.0.0@zip'
}

task unzipKnn(type: Copy) {
	from zipTree(configurations.knnZip.singleFile)
	into "$buildDir/libs/opensearch-knn"
}

tasks.named('build') {
	dependsOn 'unzipKnn'
}

sourceSets {
	main {
		runtimeClasspath += fileTree(dir: "$buildDir/libs/opensearch-knn", include: '**/*.jar')
	}
}

then clean build as ./gradlew clean build.