tomcat 打开文件太多

\u4e25\u91cd: Servlet.service() for servlet default threw exceptionjava.io.FileNotFoundException: /home/an/tomcat/webapps/ROOT/Site/flash/xxdll.flv (Too many open files)    at java.io.FileInputStream.open(Native Method)    at java.io.FileInputStream.<init>(FileInputStream.java:106)    at org.apache.naming.resources.FileDirContext$FileResource.streamContent(FileDirContext.java:927)    at org.apache.catalina.servlets.DefaultServlet.copy(DefaultServlet.java:1832)    at org.apache.catalina.servlets.DefaultServlet.serveResource(DefaultServlet.java:919)    at org.apache.catalina.servlets.DefaultServlet.doGet(DefaultServlet.java:398)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)    at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)    at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)    at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)    at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:889)    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:732)    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:2262)    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)    at java.lang.Thread.run(Thread.java:662)2011-12-8 0:00:01 org.apache.catalina.core.StandardWrapperValve invoke