Java 使用iptables重定向端口时，Hibernate无法打开连接

我有两个网站使用Struts2和Hibernate，在Ubuntu上部署Tomcat7。 Tomcat服务器使用端口80运行，我使用Ubuntu的“iptables”将端口8080重定向到80：

iptables -t nat -A PREROUTING -p tcp --dport 8080 -j REDIRECT --to-ports 80

在端口80和8080网站上的一些第一个请求正常运行后，其中一个网站（两个网站都有一段时间）出现错误，出现hibernate错误消息“无法打开连接” 以下是我的两个网站的hibernate配置文件：

<?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 name="dtasoft">
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://<serverip>/<dbname>?characterEncoding=UTF-8</property>
        <property name="hibernate.connection.username"><dbuser></property>
        <property name="hibernate.connection.password"><dbpassword></property>
        <property name="hibernate.connection.pool_size">99</property>
        <property name="hibernate.connection.zeroDateTimeBehavior">convertToNull</property>
        <property name="hibernate.connection.charSet">UTF-8</property>
        <property name="hibernate.connection.characterEncoding">UTF-8</property>
        <property name="hibernate.connection.useUnicode">true</property>
        <property name="hibernate.connection.autocommit">false</property>  

        <property name="hibernate.c3p0.min_size">10</property>
        <property name="hibernate.c3p0.max_size">100</property>
        <property name="hibernate.c3p0.timeout">300</property>
        <property name="hibernate.c3p0.max_statements">200</property>
        <property name="hibernate.c3p0.idle_test_period">300</property>


        <property name="hibernate.jdbc.batch_size">0</property>
        <property name="show_sql">true</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="hibernate.hbm2ddl.auto">update</property>

        <!-- Models here -->

    </session-factory>
</hibernate-configuration>

com.mysql.jdbc.Driver
jdbc:mysql://？characterEncoding=UTF-8
99
敞篷车
UTF-8
UTF-8
真的
假的
10
100
300
200
300
0
真的
org.hibernate.dialogue.mysqldialogue
更新

以下是错误：

org.hibernate.exception.JDBCConnectionException: Cannot open connection at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:99) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449) at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:160) at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:81) at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473) at com.anhdt.website.dao.AbstractSimpleGenericDao.<init>(AbstractSimpleGenericDao.java:38) at com.anhdt.website.dao.BlogDao.<init>(BlogDao.java:28) at com.anhdt.website.action.BlogArticle.execute(BlogArticle.java:79) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:622) at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452) at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254) at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263) at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:270) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.anhdt.website.interceptor.LoggingInterceptor.intercept(LoggingInterceptor.java:61) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:498) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701) Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:534) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.Util.getInstance(Util.java:386) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927) at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2238) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2159) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:534) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305) at java.sql.DriverManager.getConnection(DriverManager.java:615) at java.sql.DriverManager.getConnection(DriverManager.java:167) at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) ... 78 more Caused by: java.sql.SQLException: Access denied for user 'root'@'192.168.1.99' (using password: YES) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3597) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3529) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:935) at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4101) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1300) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2337) at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2177) ... 92 more

org.hibernate.exception.JDBCConnectionException:无法打开org.hibernate.exception.sqlstatecoverter.convert（sqlstatecoverter.java:99）org.hibernate.exception.jdbceptionhelper.convert（jdbceptionhelper.java:66）org.hibernate.exception.jdbceptionhelper.convert（jdbceptionhelper.java:52）上的连接在org.hibernate.jdbc.ConnectionManager.openConnection（ConnectionManager.java:449）在org.hibernate.jdbc.ConnectionManager.getConnection（ConnectionManager.java:167）在org.hibernate.jdbc.jdbc.jdbcontext.connection（jdbcontext.java:160）在org.hibernate.transaction.jdbctaction.begin（jdbctaction.java:81）上在com.anhdt.website.dao.AbstractSimpleGenericDao.（AbstractSimpleGenericDao.java:38）在com.anhdt.website.dao.BlogDao.（BlogDao.java:28）在com.anhdt.website.action.BlogArticle.execute（blogcarticle.java:79）在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）上在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:622）在com.opensymphony.xwork2.DefaultActionInvoke.invokeAction（DefaultActionInvoke.java:452）上com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly（DefaultActionInvocation.java:291）com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:254）com.opensymphony.xwork2.intercept.defaultWorkflowIntercept（defaultWorkflowIntercept.java:176）com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept（ValidationInterceptor.java:263）org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept（AnnotationValidationInterceptor.java:68）com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.interceptor（methodFilterceptor.java:98）com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）com.opensymphony.xwork2.interceptor.conversionerrorrinterceptor.intercept（conversionerrorrinterceptor.java:138）com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）com.opensymphony.xwork2.interceptor.parameters sinterceptor.doIntercept（parameters sinterceptor.java:207）在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）在com.opensymphony.xwork2.interceptor.parameters sinterceptor.doIntercept（parameters sinterceptor.java:207）上在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）在com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept（StaticParametersInterceptor.java:190）上com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）org.apache.struts2.interceptor.MultiselectInterceptor.intercept（MultiselectInterceptor.java:75）com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）org.apache.struts2.interceptor.CheckboxInterceptor（CheckboxInterceptor.java:94）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）在org.apache.struts2.interceptor.FileUploadInterceptor.interceptor（FileUploadInterceptor.java:243）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）上在com.opensymphony.xwork2.interceptor.modeldriventerceptor.intercept（modeldriventerceptor.java:100）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）在com.opensymphony.xwork2.interceptor.scopedmodeldriventerceptor.interceptor（scopedmodeldriventerceptor.java:141）上在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）在org.apache.struts2.interceptor.DebuggingInterceptor.DebuggingInterceptor.intercept（DebuggingInterceptor.java:270）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）上在com.opensymphony.xwork2.interceptor.ChainingInterceptor.interceptor（ChainingInterceptor.java:145）在com.opensymphony.xwork2.interceptor.dointerceptor（prepareiinterceptor.java:171）在com.opensymphony.xwork2.interceptor.ChainingInterceptor.java:145上com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept（I18nInterceptor.java:176）com.opensymphony.xwork2.DefaultActionInvocation（DefaultActionInvocation.java:248）位于org.apache.struts2.interceptor.ServletCon
jdbc:mysql://<ip>:<port>/<db_name>