求助：使用DBComms.receive方法期间发生异常

我做报表开发，我用的是JDBC连接池。碰到了一个问题在最后测试，Tomcat在我的机器上跑，同事用他的机器连上来压力测(50人同时并发访问)，跑了近一个半小时，但是报了以下错误：com.microsoft.sqlserver.jdbc.SQLServerException:使用DBComms.receive方法期间发生异常。操作:Softwarecausedconnectionabort:recvfailed。上下文:(110)[Thread[http-8888-Processor25,5,main],IO:c9f34,Dbc:834d6]。PktNum:0。TotalReceived:0。PktSize:4,096。atcom.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(UnknownSource)atcom.microsoft.sqlserver.jdbc.DBComms.receive(UnknownSource)atcom.microsoft.sqlserver.jdbc.IOBuffer.sendCommand(UnknownSource)atcom.microsoft.sqlserver.jdbc.SQLServerStatement.sendExecute(UnknownSource)atcom.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteQuery(UnknownSource)atcom.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeQuery(UnknownSource)atorg.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:92)atcom.ebest.dao.UserDao.loginValid(UserDao.java:716)atorg.apache.jsp.login_jsp._jspService(login_jsp.java:69)atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:802)atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:802)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)atorg.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)atorg.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)atorg.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)atorg.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)atorg.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)atorg.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)atorg.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)atorg.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)atorg.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)atorg.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)atorg.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)atorg.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)atorg.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)atorg.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)atorg.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)atorg.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)atjava.lang.Thread.run(Thread.java:595)同事停掉测试工具，然后从新开启测试工具(没有重启Tomcat)，又不会出现这问题了，请问这是怎么回事？要怎么解决？