Connection reset by peer: socket write error 错误解决办法

我的系统是MS SQL SERVER 2000做的数据库，采用tomcat的dataSource做的连接池，问题是：
    我对数据库进行还原操作，成功后，重新启动数据库服务器！然后跳转到登录页面，而这时就会报 以下错误！

    java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Connection reset by peer: socket write error
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSRPCRequest.submitRequest(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSCursorRequest.openCursor(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplStatement.execute(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.commonExecute(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.executeQueryInternal(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.executeQuery(Unknown Source)
at org.apache.tomcat.dbcp.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208)
at xnc.db.query.DBQuery.getRs(DBQuery.java:60)
at org.apache.jsp.login_jsp._jspService(login_jsp.java:145)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
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:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

报此错误的同时，数据库服务器是打开状态，即使我重新启动了 数据库服务器，依然会报此错误，我重新打开一个浏览器页，也一样报此错误！
     只有当我将TOMCAT重新启动后，才访问正常！
    
      这是为什么呢？难道连接池不能监听到数据库服务器的状态？必须重新对连接池初始化？


解决办法：
tomcat context加入断线重连机制  如下配置

  <parameter> 
               <name>validationQuery</name> 
               <value>SELECT COUNT(*) FROM DUAL</value> 
             </parameter> 
             <parameter> 
               <name>testOnBorrow</name> 
               <value>true</value> 
             </parameter> 
             <parameter> 
               <name>testOnReturn</name> 
               <value>true</value> 
             </parameter> 
             <parameter> 
               <name>testWhileIdle</name> 
               <value>true</value> 
             </parameter>

 <Resource name="dataSourceJNDI" auth="Container" 
   type="javax.sql.DataSource" 
   password="11111111" 
   username="sa" 
   driverClassName="net.sourceforge.jtds.jdbc.Driver" 
   url="jdbc:jtds:sqlserver://127.0.0.1:1433;DatabaseName=web;" maxActive="500" maxIdle="30" maxWait="5000" removeAbandoned="true" removeAbandonedTimeout="60" logAbandoned="true"/>

这句话的意思是，当连接池中的连接达到最大连接数500时，自动回收闲置60秒还没有正常关闭的连接，并在控制台输出被回收连接的相关信息。