# Create a file called logging.properties with the following contents. handlers=java.util.logging.ConsoleHandler io.grpc.level=FINE java.util.logging.ConsoleHandler.level=ALL java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter # Pass the location of the file to JVM via this command-line flag JAVA_OPTS=-Djava.util.logging.config.file=logging.properties