Question

当我们部署到tomcat时，我们的JSF应用程序工作正常，但是，当我们访问UI中的第一页时，我们收到此错误。之后，在其他页面中看不到错误。

这些是我们正在使用的jsf依赖项：

<dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-api</artifactId>
            <version>2.2.9</version>
            <type>jar</type>
        </dependency>
        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-impl</artifactId>
            <version>2.2.9</version>
            <type>jar</type>
        </dependency>

这是错误堆栈跟踪：

SEVERE: Error Loading Library: jar:file:../.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/{app}/WEB-INF/lib/jsf-impl-2.2.9.jar!/META-INF/mojarra_ext.taglib.xml
java.io.IOException: Error parsing [jar:file:../.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/{app}/WEB-INF/lib/jsf-impl-2.2.9.jar!/META-INF/mojarra_ext.taglib.xml]: 
    at com.sun.facelets.compiler.TagLibraryConfig.create(TagLibraryConfig.java:410)
    at com.sun.facelets.compiler.TagLibraryConfig.loadImplicit(TagLibraryConfig.java:431)
    at com.sun.facelets.compiler.Compiler.initialize(Compiler.java:87)
    at com.sun.facelets.compiler.Compiler.compile(Compiler.java:104)
    at com.sun.facelets.impl.DefaultFaceletFactory.createFacelet(DefaultFaceletFactory.java:197)
    at com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:144)
    at com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:95)
    at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:517)
    at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:567)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(Unknown Source)
    at com.sun.faces.lifecycle.Phase.doPhase(Unknown Source)
    at com.sun.faces.lifecycle.LifecycleImpl.render(Unknown Source)
    at javax.faces.webapp.FacesServlet.service(Unknown Source)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.bphx.cool.jsf.CustomHeaderFilter.doFilter(CustomHeaderFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:611)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
Caused by: org.xml.sax.SAXException: Error Handling [jar:file:../.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/{app}/WEB-INF/lib/jsf-impl-2.2.9.jar!/META-INF/mojarra_ext.taglib.xml@47,31]
    at com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler.error(TagLibraryConfig.java:376)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:137)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:325)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.rootElementSpecified(XMLDTDValidator.java:1599)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDValidator.java:1877)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:742)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1370)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDriver.scanRootElementHook(XMLDocumentScannerImpl.java:1290)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3130)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:880)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:649)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:333)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)
    at com.sun.facelets.compiler.TagLibraryConfig.create(TagLibraryConfig.java:407)
    ... 31 more

我该怎么做才能阻止此错误日志？

Answer 1

引起：org.xml.sax.SAXException：错误处理[jar：file：../。metadata / .plugins / org.eclipse.wst.server.core / tmp1 / wtpwebapps / {app} / WEB- INF / LIB / JSF-IMPL-2.2.9.jar！/META-INF/mojarra_ext.taglib.xml@47,31]

错误显示在/META-INF/mojarra_ext.taglib.xml文件中jsf-impl-2.2.9.jar文件的第47行，第41行。如果您使用ZIP工具打开JAR并在第47行周围探索该taglib文件，那么您将看到：

44    <facelet-taglib xmlns="http://xmlns.jcp.org/xml/ns/javaee"
45                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
46                    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facelettaglibrary_2_2.xsd"
47                    version="2.2">
48        <namespace>http://mojarra.dev.java.net/mojarra_ext</namespace>
49        <tag>

这是version="2.2"的行。这表明版本冲突。首先，您需要确保根据JSF 2.2正确声明您的webapp的/WEB-INF/faces-config.xml文件而不是旧版：

<?xml version="1.0" encoding="UTF-8"?>
<faces-config
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
    version="2.2">
    <!-- Config here -->
</faces-config>

您还需要确保webapp的/WEB-INF/lib不包含任何Facelets 1.x JAR文件。堆栈跟踪中的包com.sun.facelets.*表明在运行时类路径中存在Facelets 1.x，这在使用JSF 2.x时是不正确的，因为它已经与捆绑的Facelets 2.x捆绑在一起{{1} }。

Answer 2

在充分尊重的情况下，我不认为所选择的答案实际上解决了这个问题。至少它并没有为我解决。

抛出此异常（com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler）的类来自独立的Facelet实现。如果您调试此问题，您将看到此错误的根本原因是XML的根元素与DTD不匹配（提示：XMLDTDValidator.rootElementSpecified）。

鉴于TagLibraryConfig仅存在于独立的Facelets中，您可能遇到了与我相同的问题。发生的事情是，当旧的Facelet的TagLibraryConfig扫描META-INF/**/*.taglib.xml下所有facelet标记库的类路径时，它会拾取与旧DTD不完全兼容的Mojarra META-INF/mojarra_ext.taglib.xml（例如当时版本属性不存在））。它记录失败并愉快地继续。

避免此错误的最佳方法是开始在JSF 2.x中内置Facelets。

然而，如果你坚持使用Facelets 1.x（例如因为你正在使用RichFaces 3.x）并且对忽略这个异常的含义感到好奇，你应该知道所有标记库都提供了它提供了三个Mojarra特定标签：

regexValidator与JSF 2.0

f:validateRegex

creditcardValidator执行基本的信用卡号格式验证和Luhn检查
focus呈现一个将焦点集中在任意元素上的小脚本。

如果您不需要这些标签，则忽略此错误是非常安全的。我考虑了几种从日志中删除它的方法，但是每个解决方案（关闭记录器，自定义上下文类加载器或自定义FaceletViewHandler）都有缺点，或者对于这样一个不重要的问题似乎有些过分。

org.xml.sax.SAXException：错误处理[jar：file：{app} /WEB-INF/lib/jsf-impl-2.2.9.jar!/META-INF/mojarra_ext.taglib.xml@47,31]

2 个答案: