我试图让Apache Hadoop 1.21运行,但是我得到这个例外：
Failed to set setXIncludeAware(true) for parser org.apache.xerces.jaxp.DocumentBuilderFactoryImpl org.apache.xerces.jaxp.DocumentBuilderFactoryImpl@2662e5cf:java.lang.UnsupportedOperationException
全堆栈跟踪：
13/10/17 17:22:52 ERROR conf.Configuration: Failed to set setXIncludeAware(true) for parser org.apache.xerces.jaxp.DocumentBuilderFactoryImpl@2662e5cf:java.lang.UnsupportedOperationException: setXIncludeAware is not supported on this JAXP implementation or earlier: class org.apache.xerces.jaxp.DocumentBuilderFactoryImpl java.lang.UnsupportedOperationException: setXIncludeAware is not supported on this JAXP implementation or earlier: class org.apache.xerces.jaxp.DocumentBuilderFactoryImpl at javax.xml.parsers.DocumentBuilderFactory.setXIncludeAware(DocumentBuilderFactory.java:589) at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:1131) at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:1107) at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:1053) at org.apache.hadoop.conf.Configuration.get(Configuration.java:460) at org.apache.hadoop.fs.FileSystem.getDefaultUri(FileSystem.java:132) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:124) at main.JobExecutor.executeModelCreation(JobExecutor.java:223) at main.JobExecutor.main(JobExecutor.java:256) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.RunJar.main(RunJar.java:160)
我一直在寻找解决方案将近3天,我发现了几个网站(像这样一个：Hadoop “Failed to set setXIncludeAware(true) for parser” error and how to resolve it),这建议添加xerces和xalan到maven依赖.还有其他网站,建议几乎相反 – 从类路径中删除所有的xerces引用.但是没有建议的解决方案是工作:(
我也试图把：
System.setProperty("javax.xml.parsers.DocumentBuilderFactory","com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl");
到我的代码但是它没有帮助
我正在使用Apache Hadoop 1.21,JDK 1.7.0-17.
解决方法
在我的情况下,它是过时的Maven组件依赖于xerces-impl 2.4.0(由于mockrunner 1.0.3在测试阶段使用).以下管理的依赖关系添加到< dependencyManagemen>部分帮助.
<dependencyManagement>
<dependencies>
<dependency>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
<version>2.11.0</version>
</dependency>
</dependencies>
</dependencyManagement>
Hadoop版本为2.3.0. Here is another article描述了类似的情况.
