java.lang.ClassNotFoundException: org/apache/xerces/jaxp/DocumentBuilderFactoryImpl答案

【问题标题】：java.lang.ClassNotFoundException: org/apache/xerces/jaxp/DocumentBuilderFactoryImpljava.lang.ClassNotFoundException: org/apache/xerces/jaxp/DocumentBuilderFactoryImpl
【发布时间】：2019-03-02 07:31:15
【问题描述】：

我正在启动一个基于 java 和 tomcat 的应用程序。我收到以下错误。

Dec 08, 2015 12:04:00 PM org.apache.catalina.startup.SetAllPropertiesRule begin
WARNING: [SetAllPropertiesRule]{Server/Service/Connector} Setting property 'maxSpareThreads' to '50' did not find a matching property.
Dec 08, 2015 12:04:00 PM org.apache.catalina.startup.SetAllPropertiesRule begin
WARNING: [SetAllPropertiesRule]{Server/Service/Connector} Setting property 'maxSpareThreads' to '50' did not find a matching property.
Dec 08, 2015 12:04:01 PM org.apache.tomcat.util.digester.Digester endElement
WARNING:   No rules found matching 'Server/Service/Realm'.
Dec 08, 2015 12:04:01 PM org.apache.tomcat.util.digester.Digester endElement
WARNING:   No rules found matching 'Server/Service/Host'.
javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.DocumentBuilderFactoryImpl not found
        at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:200)
        at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:152)
        at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:232)
        at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:120)
        at org.apache.catalina.core.JreMemoryLeakPreventionListener.lifecycleEvent(JreMemoryLeakPreventionListener.java:431)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
        at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:402)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:99)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:576)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:599)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:310)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:484)
Caused by: java.lang.ClassNotFoundException: org/apache/xerces/jaxp/DocumentBuilderFactoryImpl
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:348)
        at javax.xml.parsers.FactoryFinder.getProviderClass(FactoryFinder.java:124)
        at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:188)
        ... 16 more

我已经检查了所有的配置文件。任何线索表示赞赏。

【问题讨论】：

检查类路径上的 xerces-impl.jar
检查项目的/WEB-INF/lib 目录。或者检查项目的部署配置。如果您使用的是 eclipse，请检查库的构建路径和部署程序集部分

标签： java classnotfoundexception tomcat8

【解决方案1】：

知道了，看来这是由于在运行 catalina -javaagent=... 奇怪的命令中使用了“java 代理”引起的。给我们

Caused by: java.lang.ClassNotFoundException: org/apache/xerces/jaxp/DocumentBuilderFactoryImpl

有时也给我们这个：

Caused by: org.apache.commons.logging.LogConfigurationException: java.lang.ClassNotFoundException: org.apache.logging.log4j.jcl.LogFactoryImpl (Caused by java.lang.ClassNotFoundException: org.apache.logging.log4j.jcl.LogFactoryImpl)
    at org.apache.commons.logging.LogFactory.createFactory(LogFactory.java:1276)
    at org.apache.commons.logging.LogFactory$2.run(LogFactory.java:1065)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:1062)
    at org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:497)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685)
    at org.apache.struts.validator.DynaValidatorForm.<clinit>(DynaValidatorForm.java:97)
    ... 31 more
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.jcl.LogFactoryImpl
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735)
    at org.apache.commons.logging.LogFactory.createFactory(LogFactory.java:1131)
    ... 37 more

修复：暂时去掉java代理参数，然后启动正常。可能的解决方法：让它可以登录到它的日志文件（权限）？

【讨论】：