Spring 正在失去与数据库的连接,并且无法恢复或重新连接
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【中文标题】Spring 正在失去与数据库的连接,并且无法恢复或重新连接【英文标题】:Spring is losing connection to the DB and does not recover or reconnect 【发布时间】:2015-04-20 23:39:49 【问题描述】:我在与 Maria DB 相同的主机上有一个 spring-boot 应用程序,并且两者都运行良好一段时间。但是在 12 小时到 2 天之间,spring boot 应用程序似乎失去了与数据库的连接(stacktrace)并且没有从中恢复。
当我重新启动 spring 应用程序一段时间后一切都很好。
应用程序没有负载,当它失去连接时,应用程序仍在工作,但数据库连接没有恢复。数据库在此期间没有重新启动(正常运行时间 4 周)。只有监控服务每分钟 ping 一次数据库的应用程序。 (春季靴子健康)
连接到同一数据库的其他 Java 应用程序运行良好,没有任何问题。
我的问题是:
为什么 spring 不能从该错误中恢复并再次尝试重新连接到数据库?如何设置 spring 以重新连接到数据库?
2015-02-19 15:25:48.392 INFO 4931 [qtp92662861-19] --- o.s.b.f.xml.XmlBeanDefinitionReader : Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]
2015-02-19 15:25:48.580 INFO 4931 [qtp92662861-19] --- o.s.jdbc.support.SQLErrorCodesFactory : SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, mysql, Oracle, PostgreSQL, Sybase]
2015-02-19 15:25:48.616 WARN 4931 [qtp92662861-19] --- o.s.jdbc.support.SQLErrorCodesFactory : Error while extracting database product name - falling back to empty error codes
org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.
at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:296)
at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:320)
at org.springframework.jdbc.support.SQLErrorCodesFactory.getErrorCodes(SQLErrorCodesFactory.java:214)
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.setDataSource(SQLErrorCodeSQLExceptionTranslator.java:134)
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.<init>(SQLErrorCodeSQLExceptionTranslator.java:97)
at org.springframework.jdbc.support.JdbcAccessor.getExceptionTranslator(JdbcAccessor.java:99)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:413)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:468)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:478)
at org.springframework.boot.actuate.health.DataSourceHealthIndicator.doDataSourceHealthCheck(DataSourceHealthIndicator.java:98)
at org.springframework.boot.actuate.health.DataSourceHealthIndicator.doHealthCheck(DataSourceHealthIndicator.java:87)
at org.springframework.boot.actuate.health.AbstractHealthIndicator.health(AbstractHealthIndicator.java:38)
at org.springframework.boot.actuate.endpoint.HealthEndpoint.invoke(HealthEndpoint.java:67)
at org.springframework.boot.actuate.endpoint.HealthEndpoint.invoke(HealthEndpoint.java:34)
at org.springframework.boot.actuate.endpoint.mvc.HealthMvcEndpoint.invoke(HealthMvcEndpoint.java:102)
at sun.reflect.GeneratedMethodAccessor78.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:769)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1667)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:280)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:186)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at onlinevalidation.CorsFilter.doFilter(CorsFilter.java:20)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at org.springframework.boot.actuate.autoconfigure.MetricFilterAutoConfiguration$MetricsFilter.doFilterInternal(MetricFilterAutoConfiguration.java:90)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1125)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1059)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:497)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:248)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:610)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:539)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.Util.getInstance(Util.java:360)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:924)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:870)
at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1232)
at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1225)
at com.mysql.jdbc.ConnectionImpl.getMetaData(ConnectionImpl.java:2932)
at com.mysql.jdbc.ConnectionImpl.getMetaData(ConnectionImpl.java:2927)
at sun.reflect.GeneratedMethodAccessor76.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126)
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:80)
at com.sun.proxy.$Proxy68.getMetaData(Unknown Source)
at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:285)
... 66 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 758,805 milliseconds ago. The last packet sent successfully to the server was 37 milliseconds ago.
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:408)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3427)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3327)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2526)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2484)
at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1446)
at org.springframework.jdbc.core.JdbcTemplate$1QueryStatementCallback.doInStatement(JdbcTemplate.java:452)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:402)
... 60 common frames omitted
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2914)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3337)
... 69 common frames omitted
@Configuration
@ComponentScan(value = "com.demo.validation",scopedProxy = TARGET_CLASS)
@EnableAutoConfiguration
@EnableAspectJAutoProxy(proxyTargetClass = true)
@EnableCaching(proxyTargetClass = true)
@EnableAsync(proxyTargetClass = true)
@EnableJpaRepositories
@EnableTransactionManagement(proxyTargetClass = true)
public class Configuration
main(...)
配置
spring.datasource.url=jdbc:mysql://localhost/validation
spring.datasource.username=validation
spring.datasource.password=****
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
Gradle.Build
dependencies
//Boot
compile 'org.codehaus.groovy:groovy-all:2.3.7:indy'
compile 'org.springframework.boot:spring-boot-starter-actuator:1.1.8.RELEASE'
compile 'org.springframework.boot:spring-boot-starter-security:1.1.8.RELEASE'
compile 'org.springframework:spring-aspects:4.0.7.RELEASE'
compile 'org.springframework.boot:spring-boot-starter-aop:1.1.8.RELEASE'
compile 'org.springframework:spring-instrument:4.0.7.RELEASE'
compile('org.springframework.boot:spring-boot-starter-web:1.1.8.RELEASE')
exclude module: 'spring-boot-starter-tomcat'
//servlet container
compile 'org.eclipse.jetty:jetty-webapp:9.2.3.v20140905'
compile 'org.eclipse.jetty:jetty-servlets:9.2.3.v20140905'
//DB
compile 'org.springframework.boot:spring-boot-starter-data-jpa:1.1.8.RELEASE'
compile 'mysql:mysql-connector-java:5.1.34'
//compile 'org.mariadb.jdbc:mariadb-java-client:1.1.8'
runtime 'com.h2database:h2:1.4.182'
【问题讨论】:
ehi,我也遇到了同样的问题!.. 你用autoReconnect=true
解决了还是找到了另一个(更好的)解决方案?
我已选择使用 autoreconnect=true,因为在我的情况下我没有那么多事务。
相关:***.com/questions/22684807/…
【参考方案1】:
尝试将您的连接 URL 更改为:
spring.datasource.url=jdbc:mysql://localhost/validation?autoReconnect=true
【讨论】:
我也看到了autoReconnect=true
。不建议这样做,但我从来没有找到一个深刻的原因,尤其是在春天的背景下。
我知道 - 围绕该功能存在一些争议,例如***.com/questions/667289/…。但它仍然受支持,也许它可以解决您的问题。你试过了吗?【参考方案2】:
Spring forums 的一位高级成员表示,Spring DataSource 不适合生产使用:
以上答案只是解决方案的一部分。确实你需要 正确的事务管理器并且您需要一个连接池。这 DriverManagerDataSource 不用于生产,它打开并 每次需要时关闭数据库连接。
相反,您可以使用 C3P0 作为您的数据源,它可以处理重新连接并且性能要好得多。以下是 Spring xml 配置中潜在配置的快速示例:
<bean id="c3p0DataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="#systemProperties.dbhost" />
<property name="user" value="#systemProperties.dbuser" />
<property name="password" value="#systemProperties.dbpass" />
<property name="maxPoolSize" value="25" />
<property name="minPoolSize" value="10" />
<property name="maxStatements" value="100" />
<property name="testConnectionOnCheckout" value="true" />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<constructor-arg ref="c3p0DataSource" />
</bean>
【讨论】:
@Hazok 是正确的。来自当前的 Spring 文档“Spring 发行版中的实现仅用于测试目的,不提供池。” docs.spring.io/spring-framework/docs/current/… 这是在 4 天的搜索中唯一帮助我的东西——非常感谢@Hazok。我有那个驱动程序管理器数据源并且一直失去我的连接!!! 哇。加速是疯狂的。 你会想到 Spring Boot 提供的所有东西,连接池将在列表的顶部!如何使用注解集成 C3P0? @chloe - Spring Boot 会自动提供连接池。 Spring Boot 1.5.9 的默认设置是 Tomcat JDBC 池。但是,我相信它现在默认为 Hikari CP。引入连接池,项目需要添加spring-boot-starter-data-jpa
或spring-boot-starter-jdbc
。对于 Tomcat JDBC 池,您可以通过执行以下操作来确认它正在被使用:java @Autowired private DataSource dataSource; @Test public void printSettings() System.out.println("DataSource: " + dataSource);
【参考方案3】:
hibernate 和 oracle 的 Spring (3) 启动设置:
spring.datasource.test-on-borrow=true
spring.datasource.validation-query=select 1 from dual
【讨论】:
您能否详细说明这是如何解决问题的?【参考方案4】:要详细说明@user5101998 的答案并更新其他答案,autoReconnect
实际上是不推荐的。来自the connector documentation:
不建议使用此功能,因为当应用程序无法正确处理 SQLExceptions 时,它会产生与会话状态和数据一致性相关的副作用,并且仅设计用于无法配置应用程序以处理正确的死连接和陈旧连接导致的 SQLExceptions
test-on-borrow
属性使您的提供程序(Tomcat、Hikari 等)在从连接池中获取连接之前测试连接是否有效。
validate-query
将用于确保连接有效。
使用这些参数应该可以防止 Spring 使用死连接。以 Tomcat 为例,您可以找到有关这些参数的文档 here。
【讨论】:
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