java.sql.SQLException：Connection [email protected]已关闭

大家好我正在使用JSP + Struts2 + Tomcat6 + Hibernate + mysql作为我的J2EE框架。该项目工程对当地的罚款，但是当我把它放在服务器上的几个小时后，我得到这个错误：java.sql.SQLException：Connection [email protected]已关闭

'org.hibernate.exception.GenericJDBCException: could not execute query 
    at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140) 
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128) 
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
    at org.hibernate.loader.Loader.doList(Loader.java:2297) 
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2172) 
    at org.hibernate.loader.Loader.list(Loader.java:2167) 
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:448) 
    at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) 
    at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) 
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1258) 
    at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) 
    at com.hposg.domain.HPOSG.getGameList(HPOSG.java:222) 
    at com.hposg.controller.struts.GamesLoadActionAjax.execute(GamesLoadActionAjax.java:23) 
    at sun.reflect.GeneratedMethodAccessor330.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243) 
    at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165) 
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252) 
    at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) 
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) 
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) 
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) 
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) 
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) 
    at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) 
    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) 
    at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Thread.java:636) 
Caused by: java.sql.SQLException: Connection [email protected] is closed. 
    at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.checkOpen(DelegatingConnection.java:354) 
    at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:246) 
    at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:302) 
    at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:534) 
    at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:452) 
    at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:161) 
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1596) 
    at org.hibernate.loader.Loader.doQuery(Loader.java:717) 
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:270) 
    at org.hibernate.loader.Loader.doList(Loader.java:2294) 
    ... 72 more

似乎MySQL的关闭一些它的连接，所以它导致的应用Hibernate是没有意识到这种情况。这里是我的hibernate.cfg.xml：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory> 

    <property name="connection.datasource">java:comp/env/jdbc/hposg</property> 
    <property name="dialect">org.hibernate.dialect.MySQLDialect</property> 
    <property name="show_sql">true</property> 
    <property name="current_session_context_class">thread</property> 
    <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> 
    <property name="hbm2ddl.auto">update</property> 
    <property name="hibernate.max_fetch_depth">3</property> 

    <!-- Mapping files --> 
    </session-factory> 
</hibernate-configuration>

，你在Hibernate的配置看，我通过JNDI得到我的连接。相应的配置位于context.xml文件中：

<Context> 
    <Logger className="org.apache.catalina.logger.FileLogger" 
      prefix="irvex_context_log" suffix=".txt" 
      timestamp="true"/> 

    <Resource name="jdbc/hposg" 
      global="jdbc/hposg" 
      auth="Container" 
      type="javax.sql.DataSource" 
      username="root" 
      password="******" 
      driverClassName="com.mysql.jdbc.Driver" 
      url="jdbc:mysql://127.0.0.1:3306/hposg?autoReconnect=true&amp;characterEncoding=UTF-8&amp;tcpKeepAlive=true" 
      maxActive="-1" 
      maxIdle="30" 
      maxWait="10000" 
      validationQuery="SELECT 1"   
      removeAbandoned="true" 
      logAbandoned="true" 
      /> 
</Context>

我认为validationQuery属性可以解决这个问题，但它不会。有任何想法吗？

来源

2011-04-11 SJ.Jafari

可能重复http://stackoverflow.com/questions/15949/javatomcat-垂死的databse连接） – 2011-04-11 06:56:33

（链接的问题不涉及jndi或冬眠，但这不是问题的地方。） – 2011-04-11 06:57:26

是的，问题似乎是相同的。我添加了一些属性（在Maurice的答案下面提到）以查看会发生什么。 – 2011-04-11 09:05:21

尝试在你的数据源中添加这些属性：

  testOnBorrow="true" 
      testWhileIdle="true"

来源

2011-04-11 06:56:42

我接着说：testOnBorrow =“真” testWhileIdle =“真” timeBetweenEvictionRunsMillis =“300000” removeAbandonedTimeout =“60 “'。我会等待resluts – 2011-04-11 09:01:28

我应用了上述更改，问题似乎消失了。需要提及的是，我还将mysql config中的'wait_timeout'更改为24小时。但我不确定它是否对此问题有效。 – 2011-04-16 12:27:33

正是由于MySQL的滴出一些空闲超时连接后，您可以在JDBC URL由

autoReconnect=true

避免这种

也请参阅

Document

来源

2011-04-11 06:53:43

正如你可以在我的JDBC的网址看到，我有这个参数，它并不能解决问题 – 2011-04-11 08:41:56

或者，你可以尝试增加的my.ini/的my.cnf的wait_timeout变量值，默认值是28800秒（8小时）。

也许你想在这里指MySQL的文件：MySQL :: MySQL 5.5 Reference Manual :: 5.1.4 Server System Variables :: wait_timeout

The number of seconds the server waits for activity on a noninteractive connection before closing it. This timeout applies only to TCP/IP and Unix socket file connections, not to connections made using named pipes, or shared memory.

[？的Java + Tomcat的，垂死的DATABSE连接（的

来源

2011-04-11 07:13:00

我想这不是一个长期的解决方案。这种方式的根本原因将被忽略。但无论如何感谢。 – 2011-04-11 09:03:44

你是对的，这不是一个长期的解决方案，如果你的服务器闲置了一段时间（比如在夜间），这是一个附加选项。 – 2011-04-11 18:00:25

java.sql.SQLException：Connection [email protected]已关闭

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