問題：在做excel導出時，斷點調試，自己寫的代碼沒有任何問題，從執行完自己的業務代碼到返回客戶端的過程中報瞭如下錯誤
[http-nio-8080-exec-1] 05/20-21:06:35,137 ERROR com.kr.media.framework.web.BaseExceptionResolver.doResolveHandlerMethodException(BaseExceptionResolver.java:33) - org.apache.catalina.connector.ClientAbortException: java.io.IOException: Broken pipe
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:340)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:303)
at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:109)
at com.fasterxml.jackson.core.json.UTF8JsonGenerator.flush(UTF8JsonGenerator.java:1100)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:915)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:286)
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:107)
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:265)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:182)
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:82)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:119)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:871)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:34)
at com.kr.media.util.sso.client.SsoPermissionsFilter.doFilterInternal(SsoPermissionsFilter.java:59)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.log.LogFilter.doFilterInternal(LogFilter.java:40)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.cors.CorsFilter.handleNonCORS(CorsFilter.java:104)
at com.kr.media.util.filter.cors.CorsFilter.doFilterInternal(CorsFilter.java:73)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.character.CharacterFilter.doFilterInternal(CharacterFilter.java:39)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.DefaultKrFilter.doFilterInternal(DefaultKrFilter.java:44)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
at sun.nio.ch.IOUtil.write(IOUtil.java:65)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471)
at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134)
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101)
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157)
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1221)
at org.apache.tomcat.util.net.SocketWrapperBase.flushBlocking(SocketWrapperBase.java:451)
at org.apache.tomcat.util.net.SocketWrapperBase.flush(SocketWrapperBase.java:441)
at org.apache.coyote.http11.Http11OutputBuffer.flushBuffer(Http11OutputBuffer.java:514)
at org.apache.coyote.http11.Http11OutputBuffer.flush(Http11OutputBuffer.java:243)
at org.apache.coyote.http11.Http11Processor.flush(Http11Processor.java:1494)
at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:284)
at org.apache.coyote.Response.action(Response.java:167)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:336)
... 58 more
[http-nio-8080-exec-1] 05/20-21:06:35,141 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:jar:file:/Users/pxcm-0101-01-0155/Documents/java/soft/apache-maven-3.5.3/repository/com/36kr/media-server/2.25.0/media-server-2.25.0.jar!/com/kr/media/framework/web/BaseController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,144 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/BaseMpsController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,171 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/contest/ContestApplyController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,172 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/contest/ContestBannerController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,174 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/contest/ContestEnterpriseController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,183 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/contest/ContestRecruitController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,183 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/contest/ContestSignupController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,184 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/contest/ContestUserController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,185 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/share/CityController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,187 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/shop/ShopCategoryController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,188 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/shop/ShopCombController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,189 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/shop/ShopGoodsController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,190 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/shop/ShopServiceController_zh_CN.properties
[http-nio-8080-exec-1] 05/20-21:06:35,191 INFO com.kr.media.util.spring.i18.I18MessageSource.getMergedProperties(I18MessageSource.java:105) - I18MessageSource 資源加載:file:/Users/pxcm-0101-01-0155/Documents/workspace/media-component/media-server-mps/media-server-mps-admin/target/classes/com/kr/media/mps/admin/shop/ToolController_zh_CN.properties
五月 20, 2020 9:06:35 下午 org.apache.catalina.core.StandardWrapperValve invoke
嚴重: Servlet.service() for servlet [DispatcherServlet] in context with path [tomcat] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: getOutputStream() has already been called for this response] with root cause
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:609)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:211)
at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:109)
at com.kr.media.framework.web.BaseExceptionResolver.outputJson(BaseExceptionResolver.java:123)
at com.kr.media.framework.web.BaseExceptionResolver.doResolveHandlerMethodException(BaseExceptionResolver.java:47)
at org.springframework.web.servlet.handler.AbstractHandlerMethodExceptionResolver.doResolveException(AbstractHandlerMethodExceptionResolver.java:61)
at org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.resolveException(AbstractHandlerExceptionResolver.java:140)
at org.springframework.web.servlet.DispatcherServlet.processHandlerException(DispatcherServlet.java:1255)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1062)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:34)
at com.kr.media.util.sso.client.SsoPermissionsFilter.doFilterInternal(SsoPermissionsFilter.java:59)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.log.LogFilter.doFilterInternal(LogFilter.java:40)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.cors.CorsFilter.handleNonCORS(CorsFilter.java:104)
at com.kr.media.util.filter.cors.CorsFilter.doFilterInternal(CorsFilter.java:73)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.character.CharacterFilter.doFilterInternal(CharacterFilter.java:39)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at com.kr.media.util.filter.DefaultKrFilterChain.doFilter(DefaultKrFilterChain.java:38)
at com.kr.media.util.filter.DefaultKrFilter.doFilterInternal(DefaultKrFilter.java:44)
at com.kr.media.util.filter.AbstractFilter.doFilter(AbstractFilter.java:45)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
遇到這個問題很蒙，一直以爲自己的代碼寫的有問題，還把IO流給百度了個遍，最終還是不得其因。但是請教同事，他在他本機執行了一下，一切OK，但是我這裏執行就一直報錯。他幫我看了一下，我是斷點執行的，而且他把httpClient模擬請求的request.setReadTimeout(10000)設置大了，在我這裏執行了一下也OK了。
解決方案：增加request.setReadTimeout(10000)時間。
總結原因：由於客戶端向服務端發起請求後，不待服務端正常返回，客戶端連接已經端了，從而出現Broken pipe 異常，最終導致getOutputStream() has already been called for this response 異常的產生。