Bug 44986

JSP-File has byte order marks. If the attribute is set to "UTF-8" (upper case) or the file has no byte order marks, the compilation workes fine. 

{code} 
12:32:16,946 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception 
org.apache.jasper.JasperException: /dialog.jsp(2,0) Page-encoding specified in XML prolog (UTF-8) is different from that specified in page directive (utf-8) 
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40) 
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407) 
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:236) 
at org.apache.jasper.compiler.Validator$DirectiveVisitor.comparePageEncodings(Validator.java:362) 
at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:197) 
at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:590) 
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2338) 
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2388) 
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2394) 
at org.apache.jasper.compiler.Node$Root.accept(Node.java:489) 
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2338) 
at org.apache.jasper.compiler.Validator.validate(Validator.java:1700) 
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:178) 
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:306) 
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:286) 
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:273) 
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566) 
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:316) 
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336) 
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654) 
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445) 
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379) 
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292) 
at de.cit.jsp.control.DispatchServlet.forward(DispatchServlet.java:286) 
at de.cit.jsp.control.DispatchServlet.doGet(DispatchServlet.java:272) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
at de.cit.util.javax.servlet.ValidationFilter.doFilter(ValidationFilter.java:108) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
at de.cit.util.javax.servlet.jsp.XHtmlContentTypeFilter.doFilter(XHtmlContentTypeFilter.java:36) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) 
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:230) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) 
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) 
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) 
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:420) 
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) 
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437) 
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366) 
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) 
at java.lang.Thread.run(Thread.java:619) 
{code} 

Case insensitive camparison in org.apache.jasper.compiler.Validator.comparePageEncodings(...) seems to fix the problem: 
{code} 
        /* 
         * Compares page encodings specified in various places, and throws 
         * exception in case of page encoding mismatch. 
         * 
         * @param pageDirEnc The value of the pageEncoding attribute of the page 
         * directive @param pageDir The page directive node 
         * 
         * @throws JasperException in case of page encoding mismatch 
         */ 
        private String comparePageEncodings(String pageDirEnc, 
                Node.PageDirective pageDir) throws JasperException { 

            Node.Root root = pageDir.getRoot(); 
            String configEnc = root.getJspConfigPageEncoding(); 

            /* 
             * Compare the 'pageEncoding' attribute of the page directive with 
             * the encoding specified in the JSP config element whose URL 
             * pattern matches this page. Treat "UTF-16", "UTF-16BE", and 
             * "UTF-16LE" as identical. 
             */ 
            if (configEnc != null) { 
                if (!pageDirEnc.equalsIgnoreCase(configEnc) 
                        && (!pageDirEnc.toUpperCase().startsWith("UTF-16") || !configEnc 
                                .toUpperCase().startsWith("UTF-16"))) { 
                    err.jspError(pageDir, 
                            "jsp.error.config_pagedir_encoding_mismatch", 
                            configEnc, pageDirEnc); 
                } else { 
                    return configEnc; 
                } 
            } 

            /* 
             * Compare the 'pageEncoding' attribute of the page directive with 
             * the encoding specified in the XML prolog (only for XML syntax, 
             * and only if JSP document contains XML prolog with encoding 
             * declaration). Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as 
             * identical. 
             */ 
            if ((root.isXmlSyntax() && root.isEncodingSpecifiedInProlog()) || root.isBomPresent()) { 
                String pageEnc = root.getPageEncoding(); 
                if (!pageDirEnc.equalsIgnoreCase(pageEnc) 
                        && (!pageDirEnc.toUpperCase().startsWith("UTF-16") || !pageEnc 
                                .toUpperCase().startsWith("UTF-16"))) { 
                    err.jspError(pageDir, 
                            "jsp.error.prolog_pagedir_encoding_mismatch", 
                            pageEnc, pageDirEnc); 
                } else { 
                    return pageEnc; 
                } 
            } 
             
            return pageDirEnc; 
        } 
{code}