java.net.ConnectException: Connection timed out: connect 错误

java.net.ConnectException: Connection timed out: connectat java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)at java.net.Socket.connect(Socket.java:529)at java.net.Socket.connect(Socket.java:478)at sun.net.NetworkClient.doConnect(NetworkClient.java:163)at sun.net.NetworkClient.openServer(NetworkClient.java:118)at sun.net.ftp.FtpClient.openServer(FtpClient.java:488)at sun.net.ftp.FtpClient.openServer(FtpClient.java:475)at edu.xjtu.sei.skyeye.web.malcode.MalCodeInsertAction.connectServer(MalCodeInsertAction.java:260)at edu.xjtu.sei.skyeye.web.malcode.MalCodeInsertAction.execute(MalCodeInsertAction.java:203)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440)at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249)at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:148)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:93)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:306)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:128)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:148)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:128)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:306)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:468)at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at edu.xjtu.sei.skyeye.web.SessionTimeOutFilter.doFilter(SessionTimeOutFilter.java:50)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)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:291)at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)at java.lang.Thread.run(Thread.java:619)

在上传的时候报这个错误。但是页面不会有错，上传到PDF服务器成功。最后发现是由于connection没有关闭而导致的报错。一般情况当创建了又没有关闭的connection达到400-500左右的时候就会报错，解决办法一目了然！

还于很多人说是网络连接问题，防火墙等过滤问题等。关闭防火墙、卸载杀毒软件试试，还有设置延迟的之类的等等。当然不包括各种可能，大家肯定都遇到过，项目下班前跑的没问题，早上起来就到处画红，跑不起来。这种情况又做何解？出错了不要紧，各种尝试，你懂得！