系统 报这样的错是什么原因

2012-6-12 10:34:21 org.apache.catalina.core.ApplicationContext log
严重: StandardWrapper.Throwable
net.jforum.exceptions.DatabaseException: Error while trying to start the database: net.jforum.exceptions.DatabaseException: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
        at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
        at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65)
        at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:468)
        at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:125)
        at net.jforum.C3P0PooledConnection.getConnection(C3P0PooledConnection.java:137)
        at net.jforum.ForumStartup.startDatabase(ForumStartup.java:78)
        at net.jforum.JForum.init(JForum.java:95)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
        at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:806)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        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:263)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:852)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:584)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
        at java.lang.Thread.run(Thread.java:619)
Caused by: net.jforum.exceptions.DatabaseException: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
        ... 19 more
Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
        ... 19 more
Caused by: com.mchange.v2.resourcepool.TimeoutException: The pool timed out while waiting to acquire a resource -- timeout at awaitAvailable()
        at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1157)
        at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:405)
        at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:351)
        at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:466)
        ... 16 more

还有这样的
2012-6-12 7:33:30 org.apache.catalina.session.StandardSession setAttribute
严重: Session binding event listener threw exception
java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
        at java.util.HashMap$EntryIterator.next(HashMap.java:834)
        at java.util.HashMap$EntryIterator.next(HashMap.java:832)
        at cn.myapps.core.user.action.OnlineUsers.add(OnlineUsers.java:23)
        at cn.myapps.core.user.action.OnlineUserBindingListener.valueBound(OnlineUserBindingListener.java:39)
        at org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1306)
        at org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1254)
        at org.apache.catalina.session.StandardSessionFacade.setAttribute(StandardSessionFacade.java:130)
        at cn.myapps.core.security.action.LoginHelper.initWebUser(LoginHelper.java:102)
        at cn.myapps.core.sso.autherticator.DefaultLoginAuthenticator.validateLogin(DefaultLoginAuthenticator.java:79)
        at cn.myapps.core.security.action.LoginAction.doLogin(LoginAction.java:172)
        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:597)
        at com.opensymphony.xwork.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:365)
        at com.opensymphony.xwork.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:217)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:191)
        at cn.myapps.base.web.interceptor.LogInterceptor.intercept(LogInterceptor.java:57)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:137)
        at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:81)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:115)
        at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:81)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:100)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
        at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:113)
        at com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:233)
        at com.opensymphony.webwork.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:198)
        at cn.myapps.base.web.filter.OBPMFilterDispatcher.doFilter(OBPMFilterDispatcher.java:43)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.opensymphony.webwork.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:78)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at cn.myapps.base.web.filter.AjaxMultiLanguageFilter.doFilter(AjaxMultiLanguageFilter.java:42)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at cn.myapps.base.web.filter.PersistenceFilter.doFilter(PersistenceFilter.java:30)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at cn.myapps.base.web.filter.SecurityFilter.doFilter(SecurityFilter.java:85)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jasig.cas.client.util.AssertionThreadLocalFilter.doFilter(AssertionThreadLocalFilter.java:54)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jasig.cas.client.util.HttpServletRequestWrapperFilter.doFilter(HttpServletRequestWrapperFilter.java:75)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:197)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at cn.myapps.core.sso.cas.filter.OBPMAuthenticationFilter.doFilter(OBPMAuthenticationFilter.java:84)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:76)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at cn.myapps.base.web.filter.EncodingFilter.doFilter(EncodingFilter.java:27)
        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:175)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        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:263)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:852)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:584)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
        at java.lang.Thread.run(Thread.java:619)

您好，根据错误信息应该是您的数据库没有启动成功。麻烦先用数据库客户端确认下是否是数据库本身的问题。谢谢。

启动成功了，大约20几个用户登录使用，但是过一会就报一次这样的错，主要是二楼信息里的错，现在确认一楼是由于论坛引起的。

报错了也不影响 使用，前一阵通过调整数据库配置，有所好转。但最近又开始出现。

您好，您增大数据库的连接数看下。软件的基本信息那里。

您好，您增大数据库的连接数看下。软件的基本信息那里。  在哪里配，数据库里还是平台的配置 里

您好，同事的意思是您的软件数据源配置，如下图所示：

好的，谢谢

如果您的问题解决了麻烦在帖子里说明下。谢谢！！！