请看以下，有何见教。 

You might want to consider having an error page to report such errors more gracefully 
COM.ibm.db2.jdbc.app.DB2Exception: [IBM][CLI Driver] SQL1040N  与数据库相连的应用程序已达到最大数目。  SQLSTATE=57030

at COM.ibm.db2.jdbc.app.SQLExceptionGenerator.throw_SQLException(Compiled Code)
at COM.ibm.db2.jdbc.app.SQLExceptionGenerator.check_return_code(SQLExceptionGenerator.java:353)
at COM.ibm.db2.jdbc.app.DB2Connection.connect(Compiled Code)
at COM.ibm.db2.jdbc.app.DB2Connection.(Compiled Code)
at COM.ibm.db2.jdbc.app.DB2Driver.connect(Compiled Code)
at java.sql.DriverManager.getConnection(Compiled Code)
at java.sql.DriverManager.getConnection(Compiled Code)
at C_0003a.WebSphere.AppServer.gfdlh.role_00030_00038.search_rusult_08_jsp_3._jspService(Compiled Code)
at com.sun.jsp.runtime.HttpJspBase.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at com.sun.jsp.runtime.JspServlet$JspServletWrapper.service(Compiled Code)
at com.sun.jsp.runtime.JspServlet.serviceJspFile(Compiled Code)
at com.sun.jsp.runtime.JspServlet.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(Compiled Code)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(Compiled Code)
at com.ibm.servlet.engine.webapp.IdleServletState.service(Compiled Code)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(Compiled Code)
at com.ibm.servlet.engine.webapp.ServletInstance.service(Compiled Code)
at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(Compiled Code)
at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(Compiled Code)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(Compiled Code)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(Compiled Code)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(Compiled Code)
at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(Compiled Code)
at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(Compiled Code)
at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(Compiled Code)
at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(Compiled Code)
at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(Compiled Code)
at com.ibm.servlet.engine.oselistener.SQEventListenerImp$ServiceRunnable.run(Compiled Code)
at com.ibm.servlet.engine.oselistener.SQEventListenerImp.notifySQEvent(Compiled Code)
at com.ibm.servlet.engine.oselistener.serverqueue.SQEventSource.notifyEvent(Compiled Code)
at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.notifyService(Compiled Code)
at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.run(SQWrapperEventSource.java:216)
at com.ibm.servlet.engine.oselistener.outofproc.OutOfProcThread$CtlRunnable.run(Compiled Code)
at java.lang.Thread.run(Thread.java:472)

你有以下几种选择
1.重起服务.
2.修改最大连结数.
3.应用程序连结后，要关闭连结.

你是用连接池(connection pool)吗?see websphere console.