org/apache/xerces/xni/parser/XMLConfigurationException

java.lang.NoClassDefFoundError: org/apache/xerces/xni/parser/XMLConfigurationException
org.ajax4jsf.webapp.ConfigurableXMLFilter$NekoParserConfig.createParser(ConfigurableXMLFilter.java:162)
org.ajax4jsf.webapp.ParserConfig.getParser(ParserConfig.java:49)
org.ajax4jsf.webapp.ConfigurableXMLFilter.getParser(ConfigurableXMLFilter.java:130)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:271)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)

root cause

java.lang.ClassNotFoundException: org.apache.xerces.xni.parser.XMLConfigurationException
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
org.ajax4jsf.webapp.ConfigurableXMLFilter$NekoParserConfig.createParser(ConfigurableXMLFilter.java:162)
org.ajax4jsf.webapp.ParserConfig.getParser(ParserConfig.java:49)
org.ajax4jsf.webapp.ConfigurableXMLFilter.getParser(ConfigurableXMLFilter.java:130)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:271)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)

copy xercesImpl-2.8.1.jar to tomcat/lib