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如何Resove以下错误：产生java.io.IOException：UT010029：流关闭
ERROR [com.test.filter.AuthenticationFilter] (default task-6) displayUpdateUser:Error occurred while displaying the Update User page.: java.io.IOException: UT010029: Stream is closed
at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:136)
at java.io.ByteArrayOutputStream.writeTo(ByteArrayOutputStream.java:167)
at org.springframework.web.servlet.view.AbstractView.writeToResponse(AbstractView.java:468)
at org.springframework.web.servlet.view.document.AbstractPdfView.renderMergedOutputModel(AbstractPdfView.java:82)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1243)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:870)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130)
at com.test.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:66)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.jrHandle(ServletInitialHandler.java)
at org.zeroturnaround.javarebel.integration.servlet.undertow.cbp.ServletInitialHandlerCBP.handleRequest(ServletInitialHandlerCBP.java:101)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
代码：
document.open();
PDFGenerator.createSummaryTable(document, table, dataList, relPath);
document.close();
pdfWriter.close();
os.flush();
os.close();
byte b[] = os.toByteArray();
ByteArrayOutputStream os1 = new ByteArrayOutputStream();
PdfReader pdfReader = new PdfReader(b);
PdfStamper pdfStamper = new PdfStamper(pdfReader, os1);
pdfStamper.setViewerPreferences(PdfWriter.PDFXNONE);
pdfStamper.setViewerPreferences(PdfWriter.HideMenubar);
pdfStamper.setViewerPreferences(PdfWriter.HideToolbar);
pdfStamper.setViewerPreferences(PdfWriter.HideWindowUI);
PdfWriter pdfWriter1 = pdfStamper.getWriter();
pdfWriter1.addJavaScript(getPrintJS());
pdfReader.close();
pdfStamper.close();
os1.flush();
os1.close();
OutputStream os2 = httpServletResponse.getOutputStream();
os2.write(os1.toByteArray());
os2.flush();
os2.close();
没有人在'createSummaryTable（）'方法中看到你在做什么。很奇怪你需要两次创建这个PDF。设置查看器首选项并在'createSummaryTable（）'方法中添加JavaScript会很容易。无论如何，你正试图写一些已经关闭的'ServletOutputStream'。这不是iText问题。这是一个基本的servlet问题。 –
即使你没有明确关闭ServletOutputStream，它也可能被服务器关闭。由于超时。此外，它看起来像直接写入'HttpServletResponse.getOutputStream（）'是在你的框架中的一个错误的模式：框架似乎最终尝试和写一个响应。因此，请验证您对您的框架的使用，特别是Spring Web框架。 – mkl
堆栈跟踪中的“由...引起”行在哪里？ – kolossus