CommunicationsException: Communications link failure

蔚落 2022-02-21 17:27 161阅读 0赞

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.
    	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    Caused by: java.net.ConnectException: Connection refused: connect
    	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    	at java.net.Socket.connect(Socket.java:589)
    	at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:213)
    	at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:297)
    	... 119 common frames omitted
    
    2019-04-11 10:32:28.952 ERROR 13184 --- [  XNIO-2 task-2] com..CustomHandlerExceptionResolver : request has an error: uri=/user,content-type=application/json,error=SYS9999
    
    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 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 file [E:\javaproject\x.xml]
    ### The error may involve com.Count
    ### The error occurred while executing a query
    ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is 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.
    	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)
    	at com.sun.proxy.$Proxy97.selectOne(Unknown Source)
    	at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166)
    	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:83)
    	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
    	at com.sun.proxy.$Proxy105.selectUserListCount(Unknown Source)
    	at com.User(UserServiceImpl.java:98)
    	at com.User(UserController.java:154)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    Caused by: org.apache.ibatis.exceptions.PersistenceException: 
    ### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is 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 file [E:\javaproject\x.xml]
    ### The error may involve com.Count
    ### The error occurred while executing a query
    ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is 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.
    	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
    	... 70 common frames omitted
    Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is 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.
    	at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:81)
    	at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
    	at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
    	at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:338)
    	at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84)
    	at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
    	at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:326)
    	at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
    	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
    	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
    	... 77 common frames omitted
    Caused by: 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.
    	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    	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:377)
    	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036)
    	at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:338)
    	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2232)
    	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265)
    	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064)
    	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790)
    	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
    Caused by: java.net.ConnectException: Connection refused: connect
    	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    	at java.net.Socket.connect(Socket.java:589)
    	at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:213)
    	at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:297)
    	... 119 common frames omitted

今天启动springboot项目突然报错，没有修改过数据库配置呀，连接不上数据库了，telnet一下，果然不通，运维同事换了环境了，却没通知，更换运行同事给的新部署ip 端口，telnet通了  
![在这里插入图片描述][20190411104038604.png]

[20190411104038604.png]: /images/20220221/c18b1bc6bde74596b3c1f0d4d8553e14.png