[Resolvido] Problema c/ Glassfish Unable to parse document jsf-ri-runtime

Boa tarde pessoal

Estou com um problema no glassfish a alguns dias, de uma hora para outra começou a gerar o erro abaixo (Unable to parse document ‘bundle://184.0:1/com/sun/faces/jsf-ri-runtime.xml’), as vezes quando tenta inicializá-lo outras quando tenta-se implantar o projeto.
Alguém saberia me ajudar com esse problema?

Detalhes:
Glassfish 3.1.2
Netbeans 7.1.2

com.sun.faces.config.ConfigurationException: java.util.concurrent.ExecutionException: com.sun.faces.config.ConfigurationException: Unable to parse document 'bundle://184.0:1/com/sun/faces/jsf-ri-runtime.xml': DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory.
	at com.sun.faces.config.ConfigManager.getConfigDocuments(ConfigManager.java:672)
	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.contextListenerStart(StandardContext.java:4750)
	at com.sun.enterprise.web.WebModule.contextListenerStart(WebModule.java:550)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:5366)
	at com.sun.enterprise.web.WebModule.start(WebModule.java:498)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:917)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:733)
	at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2018)
	at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1669)
	at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
	at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
	at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
	at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:301)
	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:461)
	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
	at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:389)
	at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:348)
	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:363)
	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1085)
	at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:95)
	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1291)
	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1259)
	at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:461)
	at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:212)
	at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:179)
	at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
	at com.sun.enterprise.v3.services.impl.ContainerMapper$Hk2DispatcherCallable.call(ContainerMapper.java:354)
	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
	at java.lang.Thread.run(Thread.java:722)

Depois de pesquisar mais ainda na web eu encontrei que uma biblioteca que estava no meu library chamada xercesImpl-2.7.0.jar estava conflitando com a do glassfish.
Bastou eu removê-la que voltou a funcionar normalmente.