title: java.lang.NoSuchMethodError: org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar
body: <p>When i try to build my first project using maven, i get the following exceptions</p>
  
  <pre><code>SEVERE: Critical error during deployment: 
  java.lang.NoSuchMethodError: org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar([Lorg/apache/xerces/xni/parser/XMLInputSource;)V
      at org.apache.xerces.jaxp.validation.XMLSchemaFactory.newSchema(Unknown Source)
      at javax.xml.validation.SchemaFactory.newSchema(SchemaFactory.java:594)
      at com.sun.faces.config.DbfFactory.initStatics(DbfFactory.java:248)
      at com.sun.faces.config.DbfFactory.&lt;clinit&gt;(DbfFactory.java:208)
      at com.sun.faces.config.ConfigManager$ParseTask.&lt;init&gt;(ConfigManager.java:893)
      at com.sun.faces.config.ConfigManager.getConfigDocuments(ConfigManager.java:653)
      at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:322)
      at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:225)
      at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
      at org.apache.catalina.core.StandardService.start(StandardService.java:519)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
      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.catalina.startup.Bootstrap.start(Bootstrap.java:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
  25/09/2011 02:40:15 م org.apache.catalina.core.StandardContext listenerStart
  SEVERE: Exception sending context initialized event to listener instance of class com.sun.faces.config.ConfigureListener
  java.lang.RuntimeException: java.lang.NoSuchMethodError: org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar([Lorg/apache/xerces/xni/parser/XMLInputSource;)V
      at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:292)
      at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
      at org.apache.catalina.core.StandardService.start(StandardService.java:519)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
      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.catalina.startup.Bootstrap.start(Bootstrap.java:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
  Caused by: java.lang.NoSuchMethodError: org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar([Lorg/apache/xerces/xni/parser/XMLInputSource;)V
      at org.apache.xerces.jaxp.validation.XMLSchemaFactory.newSchema(Unknown Source)
      at javax.xml.validation.SchemaFactory.newSchema(SchemaFactory.java:594)
      at com.sun.faces.config.DbfFactory.initStatics(DbfFactory.java:248)
      at com.sun.faces.config.DbfFactory.&lt;clinit&gt;(DbfFactory.java:208)
      at com.sun.faces.config.ConfigManager$ParseTask.&lt;init&gt;(ConfigManager.java:893)
      at com.sun.faces.config.ConfigManager.getConfigDocuments(ConfigManager.java:653)
      at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:322)
      at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:225)
      ... 15 more
  25/09/2011 02:40:15 م org.apache.catalina.core.StandardContext start
  SEVERE: Error listenerStart
  25/09/2011 02:40:15 م org.apache.catalina.core.StandardContext start
  SEVERE: Context [/spring_faces] startup failed due to previous errors
  25/09/2011 02:40:16 م org.icefaces.impl.push.servlet.ICEpushResourceHandler notifyContextShutdown
  INFO: MainServlet not found in application scope: java.lang.NullPointerException
  25/09/2011 02:40:16 م com.sun.faces.config.ConfigureListener contextDestroyed
  SEVERE: Unexpected exception when attempting to tear down the Mojarra runtime
  java.lang.IllegalStateException: Application was not properly initialized at startup, could not find Factory: javax.faces.application.ApplicationFactory
      at javax.faces.FactoryFinder$FactoryManager.getFactory(FactoryFinder.java:894)
      at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:319)
      at com.sun.faces.config.InitFacesContext.getApplication(InitFacesContext.java:112)
      at com.sun.faces.config.ConfigureListener.contextDestroyed(ConfigureListener.java:325)
      at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4011)
      at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4615)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4512)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
      at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
      at org.apache.catalina.core.StandardService.start(StandardService.java:519)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
      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.catalina.startup.Bootstrap.start(Bootstrap.java:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
  25/09/2011 02:40:16 م org.apache.catalina.core.ApplicationContext log
  INFO: Closing Spring root WebApplicationContext
  25/09/2011 02:40:16 م org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
  SEVERE: A web application registered the JBDC driver [org.postgresql.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
  25/09/2011 02:40:16 م org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
  SEVERE: A web application created a ThreadLocal with key of type [null] (value [javax.faces.context.FacesContext$1@678fb397]) and a value of type [com.sun.faces.config.InitFacesContext] (value [com.sun.faces.config.InitFacesContext@b57b39f]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed.
  log4j:ERROR LogMananger.repositorySelector was null likely due to error in class reloading, using NOPLoggerRepository.
  </code></pre>