Hello, I run "datahub docker quickstart --quickstart-compose-file .\.datahub\quickstart\docker-compose-neo4j.yml --graph-service-impl=neo4j", everything seems to be OK. Then I run "datahub docker ingest-sample-data" successfully. But in noo4j database, I did not see any graph data. Any configuration I was missing? Help!!!

I am not actually sure where you found a compose file called

docker-compose-neo4j.yml

. We have files that are specifically not running neo4j with

without-neo4j

for example. I have created a perhaps simpler way to run with neo4j assuming you have checked out the repository. This is documented here https://github.com/datahub-project/datahub/tree/master/docker/profiles (see the README.md). This would startup quickstart with neo4j using this

./gradlew debug-neo4j

. Neo4j as the graph database is not extensively tested internally although there are a good number of unit tests around it.