The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:83)

at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)

at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)

at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:345)

at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:89)

at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:64)

at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:333)

at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:158)

at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:110)

at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:90)

at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:154)

... 63 common frames omitted

Caused by: com.mysql.cj.jdbc.exceptions.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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:175)

at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)

at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:825)

at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:446)

at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:239)

at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:188)

at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:118)

at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:232)

at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:112)

at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1706)

at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1801)

at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:938)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1462)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1458)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:83)

at org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource.getConnection(AbstractRoutingDataSource.java:194)

at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:159)

at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:117)

at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)

... 73 common frames omitted

Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure