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java.lang.AbstractMethodError: 	at com.sun.org.apache.commons.digester.Digester.setFeature(Digester.java:570)	at org.apache.catalina.startup.DigesterFactory.patchXerces(DigesterFactory.java:149)	at org.apache.catalina.startup.DigesterFactory.newDigester(DigesterFactory.java:117)	at org.apache.catalina.startup.TldConfig.createTldDigester(TldConfig.java:488)	at org.apache.catalina.startup.TldConfig.tldScanStream(TldConfig.java:597)	at org.apache.catalina.startup.TldConfig.tldScanStream(TldConfig.java:590)	at org.apache.catalina.startup.TldConfig.tldScanTld(TldConfig.java:639)	at org.apache.catalina.startup.TldConfig.execute(TldConfig.java:373)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4696)	at com.sun.enterprise.web.WebModule.start(WebModule.java:292)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1095)	at org.apache.catalina.core.StandardHost.start(StandardHost.java:907)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1095)	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:520)	at org.apache.catalina.startup.Embedded.start(Embedded.java:920)	at com.sun.enterprise.web.WebContainer.start(WebContainer.java:784)	at com.sun.enterprise.web.PEWebContainer.startInstance(PEWebContainer.java:722)	at com.sun.enterprise.web.PEWebContainerLifecycle.onStartup(PEWebContainerLifecycle.java:72)	at com.sun.enterprise.server.ondemand.ServiceGroup.startLifecycleServices(ServiceGroup.java:266)	at com.sun.enterprise.server.ondemand.WebServiceGroup.startLifecycleServices(WebServiceGroup.java:210)	at com.sun.enterprise.server.ondemand.WebServiceGroup.start(WebServiceGroup.java:60)	at com.sun.enterprise.server.ondemand.ServiceGroup$1.run(ServiceGroup.java:180)	at java.security.AccessController.doPrivileged(Native Method)	at com.sun.enterprise.server.ondemand.ServiceGroup.startChildren(ServiceGroup.java:177)	at com.sun.enterprise.server.ondemand.MainServiceGroup.start(MainServiceGroup.java:45)	at com.sun.enterprise.server.ondemand.ServerEntryListenerImpl.notifyEntry(ServerEntryListenerImpl.java:72)	at com.sun.enterprise.server.ondemand.entry.ServerEntryHelper.sendEvent(ServerEntryHelper.java:62)	at com.sun.enterprise.server.ondemand.entry.ServerEntryHelper.generateAppLoaderEntryContext(ServerEntryHelper.java:47)	at com.sun.enterprise.server.AbstractLoader.generateEntryContext(AbstractLoader.java:827)	at com.sun.enterprise.server.AbstractLoader.notifyAppEvent(AbstractLoader.java:833)	at com.sun.enterprise.server.DummyWebModuleLoader.load(DummyWebModuleLoader.java:62)	at com.sun.enterprise.server.AbstractManager.load(AbstractManager.java:206)	at com.sun.enterprise.server.ApplicationLifecycle.onStartup(ApplicationLifecycle.java:201)	at com.sun.enterprise.server.ApplicationServer.onStartup(ApplicationServer.java:326)	at com.sun.enterprise.server.ondemand.OnDemandServer.onStartup(OnDemandServer.java:112)	at com.sun.enterprise.server.PEMain.run(PEMain.java:326)	at com.sun.enterprise.server.PEMain.main(PEMain.java:260)	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:585)	at com.sun.enterprise.server.PELaunch.main(PELaunch.java:272)