com.mysql.jdbc.Connection.isValid(I)Z Error问题

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#tomcat #数据源

本文详细介绍了在实验Tomcat的DBCP数据源时遇到的com.mysql.jdbc.Connection.isValid(I)Z错误的原因分析及解决方法，即JDBC驱动过旧的问题。通过更新驱动至最新版本并放置于tomcat的lib目录下，可以有效解决该问题。

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实验TomCat的DBCP数据源的时候发生com.mysql.jdbc.Connection.isValid(I)Z错误。
原因：JDBC驱动过旧。
解决方法：更新驱动 放在tomcat的lib目录下
参考文章 click here

springboot项目启动报错：java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z
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报错信息 Caused by: java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z at com.zaxxer.hikari.pool.PoolBase.checkDriverSupport(PoolBase.java:445) at com.zaxxer.hikari.pool.PoolBase.setupConnection(PoolBase.java:412) at com.zaxxer.hikari.pool
com.mysql.jdbc.connection.isvalid
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java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid 版本问题 mysql-connector 版本为 5.0.4 ，那么对应的 dbcp 和 pool 版本应该为 1.4 和 1.6 　　isVaild 在 com.mysql.jdbc.Connection （5.0.4 ） 中并未实现上述方法,因此...
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背景 在搭建springboot项目过程中，完成了项目启动，但是执行数据库操作就会报如下错误： com.mysql.jdbc.Connection.isValid(I)Z 原因 mysql的jar包版本过低。 只需将mysql 的jar包更新一下就行。 在更换的过程中还发现一个错误：Unknown system variable ‘tx_read_only’，原因是jdbc驱动5.*的版本不支...
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.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z   出现此类错误注意检查数据库驱动的版本，将低版本换成高版本的， 我的原来是 mysql-connector-java-5.0.8-bin   更换后的 mysql-connector-java-5.1.46-bin 如果版本更换之后还没有解决问题请看下图 ...
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随时随地阅读更多技术实战干货，获取项目源码、学习资料，请关注源代码社区公众号(ydmsq666)、博主微信（guyun297890152）、QQ技术交流群(183198395)。 .AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z 下载更高版本的mysql驱动 JDCP连接池连接数据库报错：java.lang.Ab...
jdbc-mysql-connection
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标题中的"jdbc-mysql-connection"关键词表明我们讨论的主题是关于Java数据库连接（JDBC）与MySQL数据库之间的交互。JDBC是Java平台上的一个标准接口，它允许Java应用程序与各种类型的数据库进行通信，包括MySQL。...
java.sql.SQLNonTransientConnectionException: Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the main URL sections. at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:79) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:131) at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:220) at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677) at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:228) at mysql.GetConnection.getConnection(GetConnection.java:19) at Main.main(Main.java:15) Caused by: com.mysql.cj.exceptions.UnableToConnectException: Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the main URL sections. at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ... 5 more Caused by: com.mysql.cj.exce
03-18
System.out.println("连接成功：" + conn.isValid(5)); } ``` #### 6. **特殊字符处理** 若密码含`@`等符号，尝试URL编码： ```properties password=xq123%40123 <!-- 将@替换为%40 --> ``` --- ###
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06-22
The `com.mysql.cj.jdbc.Driver` is the JDBC driver for MySQL, but it seems there's an issue during the connection. Here are some possible reasons and solutions: 1. **Driver not found or loaded**: ...
ERROR com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Exception during pool initialization. com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
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return "Connection valid: " + conn.isValid(5); } } } ``` 访问 `http://server-ip:8080/checkdb` 应返回：`Connection valid: true` --- #### **高级修复技巧** 1. **时区冲突处理** 若出现 `No timezone ...
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invok (NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.i voke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:34 ) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:473 Caused by: org.apache.catalina.LifecycleException: 鏃犳硶鍚姩缁勪欢[St ndardEngine[Catalina].StandardHost[localhost].StandardContext[/KuCun2]] at org.apache.catalina.util.LifecycleBase.handleSubClassExceptio (LifecycleBase.java:440) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.ja a:198) at org.apache.catalina.core.ContainerBase.addChildInternal(Conta nerBase.java:717) ... 37 more Caused by: org.springframework.beans.factory.BeanCreationException: Erro creating bean with name 'entityManagerFactory' defined in class path resource org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class] Invocation of init method failed; nested exception is javax.persistence.Persis enceException: [PersistenceUnit: default] Unable to build Hibernate SessionFact ry; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution at org.springframework.beans.factory.support.AbstractAutowireCap bleBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1799) at org.springframework.beans.factory.support.AbstractAutowireCap bleBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) at org.springframework.beans.factory.support.AbstractAutowireCap bleBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) at org.springframework.beans.factory.support.AbstractBeanFactory lambda$doGetBean$0(AbstractBeanFactory.java:324) at org.springframework.beans.factory.support.DefaultSingletonBea Registry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory doGetBean(AbstractBeanFactory.java:322) at org.springframework.beans.factory.support.AbstractBeanFactory getBean(AbstractBeanFactory.java:202) at org.springframework.context.support.AbstractApplicationContex .getBean(AbstractApplicationContext.java:1109) at org.springframework.context.support.AbstractApplicationContex .finishBeanFactoryInitialization(AbstractApplicationContext.java:869) at org.springframework.context.support.AbstractApplicationContex .refresh(AbstractApplicationContext.java:551) at org.springframework.boot.web.servlet.context.ServletWebServer pplicationContext.refresh(ServletWebServerApplicationContext.java:143) at org.springframework.boot.SpringApplication.refresh(SpringAppl cation.java:755) at org.springframework.boot.SpringApplication.refresh(SpringAppl cation.java:747) at org.springframework.boot.SpringApplication.refreshContext(Spr ngApplication.java:402) at org.springframework.boot.SpringApplication.run(SpringApplicat on.java:312) at org.springframework.boot.web.servlet.support.SpringBootServle Initializer.run(SpringBootServletInitializer.java:173) at org.springframework.boot.web.servlet.support.SpringBootServle Initializer.createRootApplicationContext(SpringBootServletInitializer.java:153) at org.springframework.boot.web.servlet.support.SpringBootServle Initializer.onStartup(SpringBootServletInitializer.java:95) at org.springframework.web.SpringServletContainerInitializer.onS artup(SpringServletContainerInitializer.java:172) at org.apache.catalina.core.StandardContext.startInternal(Standa dContext.java:5128) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.ja a:183) ... 38 more Caused by: javax.persistence.PersistenceException: [PersistenceUnit: def ult] Unable to build Hibernate SessionFactory; nested exception is org.hibernat .exception.JDBCConnectionException: Unable to open JDBC Connection for DDL exec tion at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean. uildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:403) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean. fterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) at org.springframework.orm.jpa.LocalContainerEntityManagerFactor Bean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) at org.springframework.beans.factory.support.AbstractAutowireCap bleBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1858) at org.springframework.beans.factory.support.AbstractAutowireCap bleBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1795) ... 58 more Caused by: org.hibernate.exception.JDBCConnectionException: Unable to op n JDBC Connection for DDL execution at org.hibernate.exception.internal.SQLStateConversionDelegate.c nvert(SQLStateConversionDelegate.java:112) at org.hibernate.exception.internal.StandardSQLExceptionConverte .convert(StandardSQLExceptionConverter.java:42) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlE ceptionHelper.java:113) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlE ceptionHelper.java:99) at org.hibernate.resource.transaction.backend.jdbc.internal.DdlT ansactionIsolatorNonJtaImpl.getIsolatedConnection(DdlTransactionIsolatorNonJtaI pl.java:69) at org.hibernate.tool.schema.internal.exec.ImprovedExtractionCon extImpl.getJdbcConnection(ImprovedExtractionContextImpl.java:60) at org.hibernate.tool.schema.internal.exec.ImprovedExtractionCon extImpl.getJdbcDatabaseMetaData(ImprovedExtractionContextImpl.java:67) at org.hibernate.tool.schema.extract.internal.InformationExtract rJdbcDatabaseMetaDataImpl.getTables(InformationExtractorJdbcDatabaseMetaDataImp .java:333) at org.hibernate.tool.schema.extract.internal.DatabaseInformatio Impl.getTablesInformation(DatabaseInformationImpl.java:120) at org.hibernate.tool.schema.internal.GroupedSchemaMigratorImpl. erformTablesMigration(GroupedSchemaMigratorImpl.java:65) at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.per ormMigration(AbstractSchemaMigrator.java:207) at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doM gration(AbstractSchemaMigrator.java:114) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator performDatabaseAction(SchemaManagementToolCoordinator.java:184) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator process(SchemaManagementToolCoordinator.java:73) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFacto yImpl.java:318) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(S ssionFactoryBuilderImpl.java:468) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderIm l.build(EntityManagerFactoryBuilderImpl.java:1259) at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersiste ceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistencePro ider.java:58) at org.springframework.orm.jpa.LocalContainerEntityManagerFactor Bean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.ja a:365) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean. uildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ... 62 more Caused by: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communi ations link failure he last packet sent successfully to the server was 0 milliseconds ago. The driv r has not received any packets from the server. at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsExc ption(SQLError.java:175) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateEx eption(SQLExceptionsMapping.java:64) at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.j va:825) at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:4 6) at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.j va:239) at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegistering river.java:188) at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverD taSource.java:138) at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:3 8) at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:20 ) at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool. ava:477) at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.ja a:560) at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSo rce.java:112) at org.hibernate.engine.jdbc.connections.internal.DatasourceConn ctionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiat r$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitia or.java:180) at org.hibernate.resource.transaction.backend.jdbc.internal.DdlT ansactionIsolatorNonJtaImpl.getIsolatedConnection(DdlTransactionIsolatorNonJtaI pl.java:43) ... 77 more Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communicat ons link failure he last packet sent successfully to the server was 0 milliseconds ago. The driv r has not received any packets from the server. at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl. ewInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl. ewInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorI pl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Construct r.java:490) at com.mysql.cj.exceptions.ExceptionFactory.createException(Exce tionFactory.java:62) at com.mysql.cj.exceptions.ExceptionFactory.createException(Exce tionFactory.java:105) at com.mysql.cj.exceptions.ExceptionFactory.createException(Exce tionFactory.java:150) at com.mysql.cj.exceptions.ExceptionFactory.createCommunications xception(ExceptionFactory.java:166) at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection NativeProtocol.java:379) at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect( ativeAuthenticationProvider.java:206) at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol java:1430) at com.mysql.cj.NativeSession.connect(NativeSession.java:134) at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(Connection mpl.java:945) at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.j va:815) ... 90 more Caused by: javax.net.ssl.SSLHandshakeException: NotBefore: Fri Jun 27 18 58:12 CST 2025 at java.base/sun.security.ssl.Alert.createSSLException(Alert.jav :128) at java.base/sun.security.ssl.TransportContext.fatal(TransportCo text.java:321) at java.base/sun.security.ssl.TransportContext.fatal(TransportCo text.java:264) at java.base/sun.security.ssl.TransportContext.fatal(TransportCo text.java:259) at java.base/sun.security.ssl.CertificateMessage$T13CertificateC nsumer.checkServerCerts(CertificateMessage.java:1329) at java.base/sun.security.ssl.CertificateMessage$T13CertificateC nsumer.onConsumeCertificate(CertificateMessage.java:1204) at java.base/sun.security.ssl.CertificateMessage$T13CertificateC nsumer.consume(CertificateMessage.java:1151) at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake. ava:392) at java.base/sun.security.ssl.HandshakeContext.dispatch(Handshak Context.java:444) at java.base/sun.security.ssl.HandshakeContext.dispatch(Handshak Context.java:421) at java.base/sun.security.ssl.TransportContext.dispatch(Transpor Context.java:178) at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.j va:164) at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl java:1152) at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord( SLSocketImpl.java:1063) at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSo ketImpl.java:402) at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(Ex ortControlled.java:347) at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandsha e(StandardSocketFactory.java:191) at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHand hake(NativeSocketConnection.java:101) at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection NativeProtocol.java:370) ... 95 more Caused by: java.security.cert.CertificateNotYetValidException: NotBefore Fri Jun 27 18:58:12 CST 2025 at java.base/sun.security.x509.CertificateValidity.valid(Certifi ateValidity.java:270) at java.base/sun.security.x509.X509CertImpl.checkValidity(X509Ce tImpl.java:687) at java.base/sun.security.x509.X509CertImpl.checkValidity(X509Ce tImpl.java:660) at com.mysql.cj.protocol.ExportControlled$X509TrustManagerWrappe .checkServerTrusted(ExportControlled.java:392) at java.base/sun.security.ssl.AbstractTrustManagerWrapper.checkS rverTrusted(SSLContextImpl.java:1509) at java.base/sun.security.ssl.CertificateMessage$T13CertificateC nsumer.checkServerCerts(CertificateMessage.java:1313) ... 109 more 3-Jun-2012 02:43:37.673 淇℃伅 [main] org.apache.catalina.startup.HostConfig.de loyWAR web搴旂敤绋嬪簭瀛樻。鏂囦欢[D:\apache-tomcat-9.0.37\webapps\KuCun2.war] 鐨勯儴缃插凡鍦╗34,866]ms鍐呭畬鎴? 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3-Jun-2012 02:43:40.091 淇℃伅 [main] org.apache.catalina.startup.HostConfig.de loyDirectory 鎶妛eb 搴旂敤绋嬪簭閮ㄧ讲鍒扮洰褰?[D:\apache-tomcat-9.0.37\webapps ROOT] 3-Jun-2012 02:43:40.138 淇℃伅 [main] org.apache.catalina.startup.HostConfig.de loyDirectory Web搴旂敤绋嬪簭鐩綍[D:\apache-tomcat-9.0.37\webapps\ROOT]鐨勯儴 缃插凡鍦╗47]姣鍐呭畬鎴? 3-Jun-2012 02:43:40.154 淇℃伅 [main] org.apache.coyote.AbstractProtocol.start 寮€濮嬪崗璁鐞嗗彞鏌刐"http-nio-8080"] 3-Jun-2012 02:43:40.200 淇℃伅 [main] org.apache.coyote.AbstractProtocol.start 寮€濮嬪崗璁鐞嗗彞鏌刐"https-jsse-nio-8443"] 3-Jun-2012 02:43:40.216 淇℃伅 [main] org.apache.catalina.startup.Catalina.star [37875]姣鍚庢湇鍔″櫒鍚姩
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package com.swift; //这里导入的包是java.sql.Connection而不是com.mysql.jdbc.Connection import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class TestJDBC { ...
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