How to enable Java driver logging ?

If you want to enable the Java driver logging as you suspect issues at Bolt protocol level you can use the following additional configuration method: withLogging

See the example below for how to use it within your code.

import org.neo4j.driver.*;
import java.util.logging.Level;
import static org.neo4j.driver.AuthTokens.basic;

public class Demo {
   public static void main(String... args) {
       Config config = Config.builder().withLogging(Logging.console(Level.FINE)).build();
       AuthToken auth = basic("neo4j", "password");
       try (Driver driver = GraphDatabase.driver("neo4j://localhost:7687", auth, config)) {
           try (Session session = driver.session()) {
               session.run("RETURN 1").forEachRemaining(System.out::println);
           }
       }
   }
}

If you use Java Spring, there is an alternate method you should use.