java.net.NoRouteToHostException: No route to host: connect 2022-05-18 00:51 83阅读 0赞 **问题:** **The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.** **com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure** **java.net.NoRouteToHostException: No route to host: connect** **问题详情:** HTTP Status 500 – Internal Server Error Type Exception Report Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. 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. ### The error may exist in CompanyDetail.xml ### The error may involve CompanyDetail.getTotalCompanyDetail ### The error occurred while executing a query ### 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. org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:136) top.hsocode.dao.CompanyDetailDao.getTotalCompanyDetail(CompanyDetailDao.java:23) top.hsocode.service.CompanyDetailService.getTotalCompanyDetail(CompanyDetailService.java:11) top.hsocode.servlet.CompanyDetailServlet.doGet(CompanyDetailServlet.java:22) javax.servlet.http.HttpServlet.service(HttpServlet.java:634) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) 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:404) com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:981) com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:339) com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2253) com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2286) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2085) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:795) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44) 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:404) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:400) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:327) java.sql.DriverManager.getConnection(DriverManager.java:664) java.sql.DriverManager.getConnection(DriverManager.java:208) org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:201) org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:196) org.apache.ibatis.datasource.unpooled.UnpooledDataSource.getConnection(UnpooledDataSource.java:93) org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:138) org.apache.ibatis.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:60) org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336) org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84) 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:148) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:136) top.hsocode.dao.CompanyDetailDao.getTotalCompanyDetail(CompanyDetailDao.java:23) top.hsocode.service.CompanyDetailService.getTotalCompanyDetail(CompanyDetailService.java:11) top.hsocode.servlet.CompanyDetailServlet.doGet(CompanyDetailServlet.java:22) javax.servlet.http.HttpServlet.service(HttpServlet.java:634) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) Root Cause java.net.NoRouteToHostException: No route to host: connect java.net.DualStackPlainSocketImpl.connect0(Native Method) java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) java.net.Socket.connect(Socket.java:589) com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:298) com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2253) com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2286) com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2085) com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:795) com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44) 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:404) com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:400) com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:327) java.sql.DriverManager.getConnection(DriverManager.java:664) java.sql.DriverManager.getConnection(DriverManager.java:208) org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:201) org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:196) org.apache.ibatis.datasource.unpooled.UnpooledDataSource.getConnection(UnpooledDataSource.java:93) org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:138) org.apache.ibatis.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:60) org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336) org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84) 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:148) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:136) top.hsocode.dao.CompanyDetailDao.getTotalCompanyDetail(CompanyDetailDao.java:23) top.hsocode.service.CompanyDetailService.getTotalCompanyDetail(CompanyDetailService.java:11) top.hsocode.servlet.CompanyDetailServlet.doGet(CompanyDetailServlet.java:22) javax.servlet.http.HttpServlet.service(HttpServlet.java:634) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) Note The full stack trace of the root cause is available in the server logs. Apache Tomcat/9.0.10 **原因是没有`联网`**
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