Hi All,

While deploying a war from jboss console the following error occurred what could be the reason please help me on this I'm new to jboss server..

17:15:40,322 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 61) MSC000001: Failed to start service jboss.persistenceunit."cas.war#CasPersistence": org.jboss.msc.service.StartException in service jboss.persistenceunit."cas.war#CasPersistence": java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory

        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:172)

        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117)

        at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:667)

        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:182)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

        at java.lang.Thread.run(Thread.java:745)

        at org.jboss.threads.JBossThread.run(JBossThread.java:320)

Caused by: java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory

        at org.dom4j.DocumentFactory.getInstance(DocumentFactory.java:97)

        at org.hibernate.internal.util.xml.XMLHelper$1.doWork(XMLHelper.java:33)

        at org.hibernate.internal.util.xml.XMLHelper$1.doWork(XMLHelper.java:27)

        at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.workWithClassLoader(ClassLoaderServiceImpl.java:342)

        at org.hibernate.internal.util.xml.XMLHelper.<init>(XMLHelper.java:26)

        at org.hibernate.envers.boot.internal.EnversServiceImpl.initialize(EnversServiceImpl.java:115)

        at org.hibernate.envers.boot.internal.AdditionalJaxbMappingProducerImpl.produceAdditionalMappings(AdditionalJaxbMappingProducerImpl.java:99)

        at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:288)

        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:847)

        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:874)

        at org.jboss.as.jpa.hibernate5.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)

        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:154)

        ... 7 more

17:15:40,328 ERROR [org.jboss.as.controller.management-operation] (management task-5) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "cas")]) - failure description: {"WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"cas.war#CasPersistence\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"cas.war#CasPersistence\": java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory

    Caused by: java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory"}}

17:15:40,329 ERROR [org.jboss.as.server] (management task-5) WFLYSRV0021: Deploy of deployment "cas.war" was rolled back with the following failure message:

{"WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"cas.war#CasPersistence\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"cas.war#CasPersistence\": java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory

    Caused by: java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory"}}