2021-02-21 19:44:44.279 ERROR 11902 --- [eate-1946988038] c.a.d.p.DruidDataSource                  : create connection SQLException, url: jdbc:mysql://localhost:3309/db-mcms-open?autoReconnect=true&useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=true&serverTimezone=Asia/Shanghai, errorCode 0, state 08001

java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:906) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:831) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:149) ~[druid-1.1.9.jar!/:1.1.9]
	at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:218) ~[druid-1.1.9.jar!/:1.1.9]
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:143) ~[druid-1.1.9.jar!/:1.1.9]
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1515) ~[druid-1.1.9.jar!/:1.1.9]
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1578) ~[druid-1.1.9.jar!/:1.1.9]
	at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2466) [druid-1.1.9.jar!/:1.1.9]
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
	at sun.reflect.GeneratedConstructorAccessor98.newInstance(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_231]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_231]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.NativeSession.connect(NativeSession.java:144) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:850) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	... 10 more
Caused by: java.net.ConnectException: 拒绝连接 (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method) ~[?:1.8.0_231]
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[?:1.8.0_231]
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[?:1.8.0_231]
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[?:1.8.0_231]
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[?:1.8.0_231]
	at java.net.Socket.connect(Socket.java:606) ~[?:1.8.0_231]
	at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.NativeSession.connect(NativeSession.java:144) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:850) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
	... 10 more