jdbc连接问题
0
[已解决问题]
解决于 2018-02-28 09:26
HTTP Status 500 - Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
type Exception report
message Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.springframework.web.util.NestedServletException: 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 org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) ### The error may exist in com/dao/UserDao.java (best guess) ### The error may involve com.dao.UserDao.getUserById ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:973) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
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 org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) ### The error may exist in com/dao/UserDao.java (best guess) ### The error may involve com.dao.UserDao.getUserById ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371) com.sun.proxy.$Proxy15.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) com.sun.proxy.$Proxy18.getUserById(Unknown Source) com.serviceImpl.UserServiceImpl.getUserById(UserServiceImpl.java:16) com.controller.UserController.toIndex(UserController.java:19) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) ### The error may exist in com/dao/UserDao.java (best guess) ### The error may involve com.dao.UserDao.getUserById ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) com.sun.proxy.$Proxy15.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) com.sun.proxy.$Proxy18.getUserById(Unknown Source) com.serviceImpl.UserServiceImpl.getUserById(UserServiceImpl.java:16) com.controller.UserController.toIndex(UserController.java:19) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80) org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81) org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279) org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72) org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59) org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) com.sun.proxy.$Proxy15.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) com.sun.proxy.$Proxy18.getUserById(Unknown Source) com.serviceImpl.UserServiceImpl.getUserById(UserServiceImpl.java:16) com.controller.UserController.toIndex(UserController.java:19) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.) org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1225) org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880) org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111) org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77) org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81) org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279) org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72) org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59) org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) com.sun.proxy.$Proxy15.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) com.sun.proxy.$Proxy18.getUserById(Unknown Source) com.serviceImpl.UserServiceImpl.getUserById(UserServiceImpl.java:16) com.controller.UserController.toIndex(UserController.java:19) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
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. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) java.lang.reflect.Constructor.newInstance(Constructor.java:423) com.mysql.jdbc.Util.handleNewInstance(Util.java:409) com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1127) com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:674) com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1086) com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2506) com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2539) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) java.lang.reflect.Constructor.newInstance(Constructor.java:423) com.mysql.jdbc.Util.handleNewInstance(Util.java:409) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344) org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294) org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1247) org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1221) org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880) org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111) org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77) org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81) org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279) org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72) org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59) org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) com.sun.proxy.$Proxy15.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) com.sun.proxy.$Proxy18.getUserById(Unknown Source) com.serviceImpl.UserServiceImpl.getUserById(UserServiceImpl.java:16) com.controller.UserController.toIndex(UserController.java:19) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
root cause
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3161) com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:598) com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1086) com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2506) com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2539) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) java.lang.reflect.Constructor.newInstance(Constructor.java:423) com.mysql.jdbc.Util.handleNewInstance(Util.java:409) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344) org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294) org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1247) org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1221) org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880) org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111) org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77) org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81) org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279) org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72) org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59) org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) com.sun.proxy.$Proxy15.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) com.sun.proxy.$Proxy18.getUserById(Unknown Source) com.serviceImpl.UserServiceImpl.getUserById(UserServiceImpl.java:16) com.controller.UserController.toIndex(UserController.java:19) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.47 logs.
Apache Tomcat/8.0.47
最佳答案
0
几个可能
1 mysql的驱动版本可能存在不兼容
2 mysql的连接是否泄露了，在mysql命令行下输入show process list，可以看到当前的连接
奖励园豆：5
不知道什么原因，昨天没改什么他就可以了，好像是数据库的问题
可能就是你所说的线程问题，现在莫名奇妙的好了
其他回答(1)
0
maven的mysql依赖包和项目buildpath的包冲突了
怎么解决呢？
@刘凌枫羽: 我也是从CSDN上看到了一个帖子，你看一下吧
http://blog.csdn.net/geniusle201/article/details/55188445，
@软件杨威: 好
