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Java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"

Apr 142010
 
 Java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"  April 14, 2010  Posted by on April 14, 2010 at 3:32 pm XML Tagged with: ,  Add comments

Exception:

10/04/14 10:10:17 ERROR conf.Configuration: Failed to set setXIncludeAware(true) for parser org.apache.xerces.jaxp.DocumentBuilderFactoryImpl@65b60280:java.lang.UnsupportedOperationException: This parser does not support specification “null” version “null”
java.lang.UnsupportedOperationException: This parser does not support specification “null” version “null”
at javax.xml.parsers.DocumentBuilderFactory.setXIncludeAware(DocumentBuilderFactory.java:590)
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:1053)
at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:1029)
at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:979)
at org.apache.hadoop.conf.Configuration.get(Configuration.java:381)
at org.apache.hadoop.mapred.JobConf.checkAndWarnDeprecation(JobConf.java:1630)
at org.apache.hadoop.mapred.JobConf.<init>(JobConf.java:184)
at com.ibm.webahead.steer.importer.hadoop.item.RecDataHadoopLoader.prepareJob(RecDataHadoopLoader.java:149)
at com.ibm.webahead.steer.importer.hadoop.item.RecDataHadoopLoader.run(RecDataHadoopLoader.java:175)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at com.ibm.webahead.steer.importer.hadoop.item.RecDataHadoopLoader.main(RecDataHadoopLoader.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)

解决办法：

删除依赖的包 xercesImpl-2.6.2.jar，使用JDK自身的解析器

Jar files like xerces-2.6.2.jar, crimson.jar, xalan.jar along
with jaxp.jar has older version SAXParserFactory. So all the above jar
files should be removed from class parh.

SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setSchema(schema);

If SAXParserFactory is loaded from any of the older versions of JAXP, exception is thrown.
Let SAXParserFactory to be loaded from default J2SE 1.5. And it will work.

newitfarmer

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