The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549) ~[tomcat-dbcp.jar:7.0.79]
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388) ~[tomcat-dbcp.jar:7.0.79]
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) ~[tomcat-dbcp.jar:7.0.79]
at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:203) ~[spring-jdbc-3.2.3.RELEASE.jar:3.2.3.RELEASE]
... 77 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 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.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.7.0_45]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[na:1.7.0_45]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.7.0_45]
at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[na:1.7.0_45]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:357) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2482) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2519) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2304) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) ~[mysql-connector-java-5.1.26.jar:na]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.7.0_45]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[na:1.7.0_45]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.7.0_45]
at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[na:1.7.0_45]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346) ~[mysql-connector-java-5.1.26.jar:na]
at org.apache.tomcat.dbcp.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) ~[tomcat-dbcp.jar:7.0.79]
at org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) ~[tomcat-dbcp.jar:7.0.79]
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556) ~[tomcat-dbcp.jar:7.0.79]
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545) ~[tomcat-dbcp.jar:7.0.79]
... 80 common frames omitted
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method) ~[na:1.7.0_45]
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) ~[na:1.7.0_45]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) ~[na:1.7.0_45]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) ~[na:1.7.0_45]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) ~[na:1.7.0_45]
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.7.0_45]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.7.0_45]
at java.net.Socket.connect(Socket.java:579) ~[na:1.7.0_45]
at java.net.Socket.connect(Socket.java:528) ~[na:1.7.0_45]
at java.net.Socket.<init>(Socket.java:425) ~[na:1.7.0_45]
at java.net.Socket.<init>(Socket.java:241) ~[na:1.7.0_45]
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259) ~[mysql-connector-java-5.1.26.jar:na]
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:307) ~[mysql-connector-java-5.1.26.jar:na]
... 96 common frames omitted
2018-04-25 10:26:18,388 [RMI TCP Connection(3)-127.0.0.1] DEBUG org.activiti.engine.impl.interceptor.LogInterceptor - --- SchemaOperationsProcessEngineBuild finished --------------------------------------------------------
2018-04-25 10:26:18,389 [RMI TCP Connection(3)-127.0.0.1] DEBUG org.activiti.engine.impl.interceptor.LogInterceptor -
Reason for error:
Because the database configuration of another project was set before the idea switched branches, and the database configuration was not changed after switching branches, the former needs to be connected to a VPN to access, so a database connection timeout error was reported.
Life bit by bit, record it.