严重: Servlet.service() for servlet [dispatcher] in context with path [/mrbbs] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 

### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.alibaba.druid.pool.GetConnectionTimeoutException: wait millis 6000, active 0, maxActive 20

### The error may exist in file [D:\Tomcat8.0.39\wtpwebapps\mrbbs\WEB-INF\classes\com\mrkj\ygl\config\mapping\DictionaryMapper.xml]

### The error may involve com.mrkj.ygl.dao.sys.DictionaryMapper.selectByGroup

### The error occurred while executing a query

### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.alibaba.druid.pool.GetConnectionTimeoutException: wait millis 6000, active 0, maxActive 20] with root cause

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1084)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4232)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4164)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:926)

at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1748)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1288)

at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2506)

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2539)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321)

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832)

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)

at sun.reflect.GeneratedConstructorAccessor33.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)

at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1408)

at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1464)

at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1969)