com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.

at jdk.internal.reflect.GeneratedConstructorAccessor28.newInstance(Unknown Source) ~[na:na]

at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]

at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[na:na]

at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[na:na]

at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.Util.getInstance(Util.java:384) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:973) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:918) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2588) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832) ~[mysql-connector-java-5.1.30.jar:na]

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) ~[mysql-connector-java-5.1.30.jar:na]

at jdk.internal.reflect.GeneratedConstructorAccessor25.newInstance(Unknown Source) ~[na:na]

at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]

at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[na:na]

at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[na:na]