连接池问题....高手请进
日志: 
 java.util.NoSuchElementException:   Timeout   waiting   for   idle   object 
 	at   org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:801) 
 	at   org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:140) 
 	at   org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:518) 
 	at   DBManager.DBManager.getDB_Connection(DBManager.java:21) 
 	at   DBManager.DBManager.getDB_returnArrayListSelect(DBManager.java:62) 
 	at   com.yourcompany.struts.action.IsWhichWebAction.execute(IsWhichWebAction.java:69) 
 	at   org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) 
 	at   org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) 
 	at   org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) 
 	at   org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) 
 	at   javax.servlet.http.HttpServlet.service(HttpServlet.java:689) 
 	at   javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
 	at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) 
 	at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 	at   org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) 
 	at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) 
 	at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) 
 	at   org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) 
 	at   org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) 
 	at   org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) 
 	at   org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:425) 
 	at   org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:452) 
 	at   org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285) 
 	at   java.lang.Thread.run(Unknown   Source)     
 用了DBCP连接池,TOMCAT服务器,微软驱动   过一段时间后,就抛这个异常,服务器就当机...怎么解决啊?
------解决方案--------------------先换驱动,用jtds,微软的驱动问题多多。