wildfly伺服器系列--org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory報錯問題的解決

一、問題背景

1. 使用指令啟動wildfly伺服器時報錯如下：

::, ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "YZYWeiXin.war")]) - failure description: {
    "WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"YZYWeiXin.war#cnsoftbei-yzy\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"YZYWeiXin.war#cnsoftbei-yzy\": 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"},
    "WFLYCTL0412: Required services that are not installed:" => ["jboss.persistenceunit.\"YZYWeiXin.war#cnsoftbei-yzy\""],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
}
::, ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "labmanagement.war")]) - failure description: {
    "WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"labmanagement.war#labUnit\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"labmanagement.war#labUnit\": 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"},
    "WFLYCTL0412: Required services that are not installed:" => ["jboss.persistenceunit.\"labmanagement.war#labUnit\""],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
}
::, ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "jpa.war")]) - failure description: {
    "WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"jpa.war#engine_diagnosis_system\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"jpa.war#engine_diagnosis_system\": 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"},
    "WFLYCTL0412: Required services that are not installed:" => ["jboss.persistenceunit.\"jpa.war#engine_diagnosis_system\""],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
}
::, ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "EngineDiagnosisSystem.war")]) - failure description: {
    "WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"EngineDiagnosisSystem.war#engine_diagnosis_system\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"EngineDiagnosisSystem.war#engine_diagnosis_system\": 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"},
    "WFLYCTL0412: Required services that are not installed:" => ["jboss.persistenceunit.\"EngineDiagnosisSystem.war#engine_diagnosis_system\""],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
           

2.$WILDFLY_HOME/standalone/deploments/下standalone.xml檔案下：

二、問題分析

個人認為應該是之前部署在wildfly伺服器上的項目存在沖突，導緻報出dom4j錯誤。

三、問題解決

将$WILDFLY_HOME/standalone/deploments/standalone.xml中的

<deployments>
</deployments>
           

部署的項目删掉即可。