使用JBOSS-TOMCAT的服务器运行网站系统，运行一段时间就会出现红色代码，抛出异常？是怎么回事呀？

[jshao]

如题！

[JBossWeek]

lz，麻烦把错误消息贴一下，不然怎么帮你？

[jshao]

出错提示： javax.ejb.CreateException: Error checking if entity exists:org.jboss.util.NestedSQLException: Could not create connection; - nested throwable: (java.sql.SQLException: JZ006: 捕获到 IO 例外:java.net.ConnectException: Connection refused: connect); - nested throwable: (org.jboss.resource.ResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: JZ006: 捕获到 IO 例外:java.net.ConnectException: Connection refused: connect)) at org.jboss.ejb.plugins.cmp.jdbc.JDBCCreateEntityCommand.entityExists(JDBCCreateEntityCommand.java:166) at org.jboss.ejb.plugins.cmp.jdbc.JDBCCreateEntityCommand.execute(JDBCCreateEntityCommand.java:127) at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.createEntity(JDBCStoreManager.java:527) at org.jboss.ejb.plugins.CMPPersistenceManager.createEntity(CMPPersistenceManager.java:253) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.createEntity(CachedConnectionInterceptor.java:270) at org.jboss.ejb.EntityContainer.createHome(EntityContainer.java:728) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.java:1116) at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:73) at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invokeHome(EntitySynchronizationInterceptor.java:209) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invokeHome(CachedConnectionInterceptor.java:215) at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:88) at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79) at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:111) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178) at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:52) at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:105) at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:129) at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487) at org.jboss.ejb.Container.invoke(Container.java:738) at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1055) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517) at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98) at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102) at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:73) at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:76) at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:198) at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76) at $Proxy211.create(Unknown Source) at org.apache.jsp.index$jsp._jspService(index$jsp.java:1771) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027) at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125) at java.lang.Thread.run(Thread.java:536)

[JBossWeek]

应该是连接池配置或者网络连接方面的问题

[jshao]

原来一直很正常的！网络连接会是什么问题？

[JBossWeek]

观察是否周期性的出现异常，如果是的话，很可能是网络配置方面的问题，例如有可能是防火墙的配置问题，也有可能是网络不稳定。仅凭现在的信息很难确定，只能给些建议

[jshao]

没什么规律，隔几天就会出现这种情况，原来不经常，现在有点频繁了

[JBossWeek]

出现异常时，看看有没有执行时间较长的sql一直占着连接不释放？

[rinapt]

这个是网络的问题与软件没有关系。5 楼正解

[mir2ming]

你这个问题可能是连接数太少了，你改一下你的最大连接数吧，Try...