$ javac -cp mysql-connector-java-8.0.18.jar MySQLCJ8Issue.java $ java -cp .:mysql-connector-java-8.0.18.jar MySQLCJ8Issue java.lang.NullPointerException at com.mysql.cj.protocol.a.result.NativeResultset.initRowsWithMetadata(NativeResultset.java:123) at com.mysql.cj.jdbc.result.ResultSetImpl.initializeWithMetadata(ResultSetImpl.java:308) at com.mysql.cj.jdbc.ConnectionImpl.initializeResultsMetadataFromCache(ConnectionImpl.java:2343) at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1195) at MySQLCJ8Issue.main(MySQLCJ8Issue.java:15)