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java.lang.IllegalStateException: getOutputStream() has already been called for this response at org.apache.catalina.connector.Response.getWriter(Response.java:678)[catalina.jar:7.0.57] at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:213)[catalina.jar:7.0.57] at org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$SpelView.render(ErrorMvcAutoConfiguration.java:227)[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1271)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)[servlet-api.jar:na] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)[servlet-api.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)[tomcat7-websocket.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:108)[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:486)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)[catalina.jar:7.0.57] at org.springframework.boot.web.support.ErrorPageFilter.handleErrorStatus(ErrorPageFilter.java:149)[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:117)[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.springframework.boot.web.support.ErrorPageFilter.access$000(ErrorPageFilter.java:59)[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.springframework.boot.web.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:90)[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE] at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:108)[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)[catalina.jar:7.0.57] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)[catalina.jar:7.0.57] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)[catalina.jar:7.0.57] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)[catalina.jar:7.0.57] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)[catalina.jar:7.0.57] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)[catalina.jar:7.0.57] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)[catalina.jar:7.0.57] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)[catalina.jar:7.0.57] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)[catalina.jar:7.0.57] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)[catalina.jar:7.0.57] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)[tomcat-coyote.jar:7.0.57] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)[tomcat-coyote.jar:7.0.57] at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)[tomcat-coyote.jar:7.0.57] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)[na:1.8.0_20] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)[na:1.8.0_20] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)[tomcat-coyote.jar:7.0.57] at java.lang.Thread.run(Unknown Source)[na:1.8.0_20]