日志文件一直报这个Struts异常，版本是2.5.16 Stream closed，CSDN大佬过来讨论一下。我知道是流异常/未及时关闭，但是排插不到啊。
[23:52:56:964] [ERROR] - org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.sendErrorResponse(DefaultDispatcherErrorHandler.java:87) - Exception occurred during processing request: Stream closed
java.io.IOException: Stream closed
at org.apache.jasper.runtime.JspWriterImpl.ensureOpen(JspWriterImpl.java:187) ~[jasper.jar:9.0.10]
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:105) ~[jasper.jar:9.0.10]
at org.apache.jasper.runtime.JspWriterImpl.flush(JspWriterImpl.java:154) ~[jasper.jar:9.0.10]
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:856) ~[jasper.jar:9.0.10]
at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:491) ~[jasper.jar:9.0.10]
at org.apache.struts2.result.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:132) ~[struts2-core-2.5.16.jar:2.5.16]
at org.apache.struts2.result.StrutsResultSupport.execute(StrutsResultSupport.java:204) ~[struts2-core-2.5.16.jar:2.5.16]
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:375) ~[struts2-core-2.5.16.jar:2.5.16]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:279) ~[struts2-core-2.5.16.jar:2.5.16]
at org.apache.struts2.factory.StrutsActionProxy.execute(StrutsActionProxy.java:48) ~[struts2-core-2.5.16.jar:2.5.16]
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:574) [struts2-core-2.5.16.jar:2.5.16]
at org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:79) [struts2-core-2.5.16.jar:2.5.16]
at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:141) [struts2-core-2.5.16.jar:2.5.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.10]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.10]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) [catalina.jar:9.0.10]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [catalina.jar:9.0.10]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:608) [catalina.jar:9.0.10]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [catalina.jar:9.0.10]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [catalina.jar:9.0.10]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668) [catalina.jar:9.0.10]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [catalina.jar:9.0.10]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [catalina.jar:9.0.10]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-coyote.jar:9.0.10]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-coyote.jar:9.0.10]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764) [tomcat-coyote.jar:9.0.10]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388) [tomcat-coyote.jar:9.0.10]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-coyote.jar:9.0.10]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_161]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_161]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:9.0.10]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
