HTTP Status 500 – Internal Server Error

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 unexpected condition that prevented it from fulfilling the 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: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
### The error may exist in com/kuang/dao/BookMapper.xml
### The error may involve com.kuang.dao.BookMapper.queryAllBook
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1013)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
### The error may exist in com/kuang/dao/BookMapper.xml
### The error may involve com.kuang.dao.BookMapper.queryAllBook
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
	org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:78)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)
	com.sun.proxy.$Proxy15.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57)
	com.sun.proxy.$Proxy16.queryAllBook(Unknown Source)
	com.kuang.service.BookServiceImpl.queryAllBook(BookServiceImpl.java:33)
	com.kuang.controller.BookController.list(BookController.java:22)
	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.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
### The error may exist in com/kuang/dao/BookMapper.xml
### The error may involve com.kuang.dao.BookMapper.queryAllBook
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
	org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
	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$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
	com.sun.proxy.$Proxy15.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57)
	com.sun.proxy.$Proxy16.queryAllBook(Unknown Source)
	com.kuang.service.BookServiceImpl.queryAllBook(BookServiceImpl.java:33)
	com.kuang.controller.BookController.list(BookController.java:22)
	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.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
	org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:81)
	org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)
	org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)
	org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336)
	org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85)
	org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
	org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
	org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
	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$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
	com.sun.proxy.$Proxy15.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57)
	com.sun.proxy.$Proxy16.queryAllBook(Unknown Source)
	com.kuang.service.BookServiceImpl.queryAllBook(BookServiceImpl.java:33)
	com.kuang.controller.BookController.list(BookController.java:22)
	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.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

java.sql.SQLException: Connections could not be acquired from the underlying database!
	com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:692)
	com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
	org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157)
	org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115)
	org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78)
	org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)
	org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)
	org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336)
	org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85)
	org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
	org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
	org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
	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$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
	com.sun.proxy.$Proxy15.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57)
	com.sun.proxy.$Proxy16.queryAllBook(Unknown Source)
	com.kuang.service.BookServiceImpl.queryAllBook(BookServiceImpl.java:33)
	com.kuang.controller.BookController.list(BookController.java:22)
	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.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
	com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1469)
	com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:644)
	com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:554)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:758)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:685)
	com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
	org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157)
	org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115)
	org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78)
	org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)
	org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)
	org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336)
	org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85)
	org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
	org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
	org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
	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$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
	com.sun.proxy.$Proxy15.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57)
	com.sun.proxy.$Proxy16.queryAllBook(Unknown Source)
	com.kuang.service.BookServiceImpl.queryAllBook(BookServiceImpl.java:33)
	com.kuang.controller.BookController.list(BookController.java:22)
	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.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 7 milliseconds ago.  The last packet sent successfully to the server was 6 milliseconds ago.
	sun.reflect.GeneratedConstructorAccessor45.newInstance(Unknown Source)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
	com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
	com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:201)
	com.mysql.jdbc.MysqlIO.negotiateSSLConnection(MysqlIO.java:4914)
	com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1663)
	com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)
	com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)
	com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
	com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
	com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
	com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	sun.reflect.GeneratedConstructorAccessor38.newInstance(Unknown Source)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
	com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
	com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
	com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
	com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
	com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
	com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)

Root Cause

javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors
	sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
	sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1959)
	sun.security.ssl.Handshaker.fatalSE(Handshaker.java:328)
	sun.security.ssl.Handshaker.fatalSE(Handshaker.java:322)
	sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1614)
	sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
	sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
	sun.security.ssl.Handshaker.process_record(Handshaker.java:987)
	sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)
	sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
	sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
	sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
	com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:186)
	com.mysql.jdbc.MysqlIO.negotiateSSLConnection(MysqlIO.java:4914)
	com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1663)
	com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)
	com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)
	com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
	com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
	com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
	com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	sun.reflect.GeneratedConstructorAccessor38.newInstance(Unknown Source)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
	com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
	com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
	com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
	com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
	com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
	com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)

Root Cause

java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors
	com.mysql.jdbc.ExportControlled$X509TrustManagerWrapper.checkServerTrusted(ExportControlled.java:302)
	sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:985)
	sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1596)
	sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
	sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
	sun.security.ssl.Handshaker.process_record(Handshaker.java:987)
	sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)
	sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
	sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
	sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
	com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:186)
	com.mysql.jdbc.MysqlIO.negotiateSSLConnection(MysqlIO.java:4914)
	com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1663)
	com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)
	com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)
	com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
	com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
	com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
	com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	sun.reflect.GeneratedConstructorAccessor38.newInstance(Unknown Source)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
	com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
	com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
	com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
	com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
	com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
	com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)

Root Cause

java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors
	sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:153)
	sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:79)
	java.security.cert.CertPathValidator.validate(CertPathValidator.java:292)
	com.mysql.jdbc.ExportControlled$X509TrustManagerWrapper.checkServerTrusted(ExportControlled.java:295)
	sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:985)
	sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1596)
	sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
	sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
	sun.security.ssl.Handshaker.process_record(Handshaker.java:987)
	sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)
	sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
	sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
	sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
	com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:186)
	com.mysql.jdbc.MysqlIO.negotiateSSLConnection(MysqlIO.java:4914)
	com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1663)
	com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)
	com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)
	com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
	com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
	com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
	com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	sun.reflect.GeneratedConstructorAccessor38.newInstance(Unknown Source)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
	com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
	com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
	com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
	com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
	com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
	com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
	com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
	com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
	com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)

Note The full stack trace of the root cause is available in the server logs.
Apache Tomcat/8.5.31

最近在整合SSM项目中出现了上述错误，到网上查了一天终于解决了！

结合了网上的解决信息发现主要是以下几点：

1.jar包的问题，out文件夹中的lib是否有mysql-connector-java的jar包。

2.mybatis-config.xml中的driver、url、name、password是否写正确了。

首先我检查了我的out文件夹中有jar包，后来再重新写了一遍mybatis-config.xml就正常运行了。

🙄真是心累…