网站运行 tomcate 日志里面老报错误

修改下载次数成功
select filePath from yfile where fileid=52
修改下载次数成功
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@1664a9b
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@1f47ae8
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@82d603
select filePath from yfile where fileid=36
修改下载次数成功
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@135ae7e
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@6127da
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@196bac4
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@1684e26
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@f38cf0
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@7bfc04
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@e3fda4
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@182a70
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@12943ac
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@a09e41
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@f5d030
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@1efc208
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@1a8dfb3
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@ee260b
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@11d3226
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement@d306dd
javax.servlet.ServletException
at org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:545)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:486)
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.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
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 util.ChangeCharSet.doFilter(ChangeCharSet.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
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.valves.AccessLogValve.invoke(AccessLogValve.java:541)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)这种错误循环出现，解决不了，请高手指点