Neo4j “No dependency satisfies type class org.neo4j.kernel.api.index.SchemaIndexProvider”

Question

Neo4j Community 2.3.3 Linux (Ubuntu 14.04)

Trying to run a Java app which consumes a Kafka topic, process its messages while querying Neo4j, and writes them to anoth

Answer 1

In my case (Neo4j Shell Tools 3.0.3, Gradle 2.13), adding mergeServiceFiles() was the key for resolving this issue:

plugins { id "com.github.johnrengelman.shadow" version "1.2.3" }

shadowJar {
    classifier = 'fat'
    mergeServiceFiles()
    manifest { attributes 'Main-Class': '...' }
}

There was no need to specify the exact file (META-INF/...).

Answer 2

My suspicion is that you don't have the META-INF/services/org.neo4j.kernel.extension.KernelExtensionFactory files in your jar correctly. Internally Neo4j uses JVM's ServiceLoader to load its components.

See https://github.com/neo4j/neo4j/blob/2.3/community/lucene-index/src/main/resources/META-INF/services/org.neo4j.kernel.extension.KernelExtensionFactory for the potentially missing piece.

I assume the right way to solve this is not by changing Gradle's default jar task, instead use a plugin that handles META-INF files correctly. I've made some good experiences with the shadow plugin.