我面临一个奇怪的问题:当我在WildFly上部署我的WAR文件时,我收到以下错误:
[2017-11-27 01:15:17,777] Artifact JSFDemo:war: Artifact is being deployed, please wait... Connected to server
[2017-11-27 01:15:18,427] Artifact JSFDemo:war: Error during artifact deployment. See server log for details.
[2017-11-27 01:15:18,428] Artifact JSFDemo:war: java.lang.Exception: {"WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"JSFDemo.war#demo_unit\"" => "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"}}
我认为问题与我的某个依赖项有关。 WAR构建在POM文件上,其中继承自父代的继承,如下所示。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.abondar.experimental</groupId>
<artifactId>JavaEEDemo</artifactId>
<packaging>pom</packaging>
<version>1.0</version>
<modules>
<module>BasicCDI</module>
<module>BeanValidation</module>
<module>ORMDemo</module>
<module>EJBDemo</module>
<module>JSFDemo</module>
<module>DocumentDemo</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.jboss.arquillian</groupId>
<artifactId>arquillian-bom</artifactId>
<version>1.1.14.Final</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>8.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.jboss.weld.se</groupId>
<artifactId>weld-se-core</artifactId>
<version>3.0.1.Final</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.14.1.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbyclient</artifactId>
<version>10.14.1.0</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.12.Final</version>
<exclusions>
<exclusion>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.12.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.5.Final</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.el</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.protocol</groupId>
<artifactId>arquillian-protocol-servlet</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.container</groupId>
<artifactId>arquillian-container-test-api</artifactId>
<version>1.1.14.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jboss.arquillian.core/arquillian-core-impl-base -->
<dependency>
<groupId>org.jboss.arquillian.core</groupId>
<artifactId>arquillian-core-impl-base</artifactId>
<version>1.1.14.Final</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.json</artifactId>
<version>1.1.2</version>
</dependency>
</dependencies>
<build>
<!--for web related demos-->
<plugins>
<plugin>
<groupId>org.wildfly.plugins</groupId>
<artifactId>wildfly-maven-plugin</artifactId>
<version>1.2.1.Final</version>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
</project>
那是儿童POM文件:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>JavaEEDemo</artifactId>
<groupId>org.abondar.experimental</groupId>
<version>1.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<artifactId>JSFDemo</artifactId>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<jdkToolchain>
<version>[1.8,9)</version>
</jdkToolchain>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</version>
<configuration>
<skip>false</skip>
<warSourceDirectory>src/main/webapp</warSourceDirectory>
<warName>JSFDemo</warName>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.wildfly.plugins</groupId>
<artifactId>wildfly-maven-plugin</artifactId>
<version>1.2.1.Final</version>
<configuration>
<hostname>localhost</hostname>
<port>9990</port>
<username>user</username>
<password>password</password>
<filename>${project.build.finalName}.war</filename>
</configuration>
<executions>
<execution>
<phase>install</phase>
<goals>
<goal>deploy</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
我尝试制作hibernate-core
范围provided
并从中排除dom4j
。我的POM结构的确切解决方法是什么?
答案 0 :(得分:0)
您收到此错误的原因是因为您从两个不同的类加载器加载了类org.dom4j.DocumentFactory。
很可能它是在WildFly中提供的,并且您将它打包在WAR文件的lib目录中的JAR中。因此,请查看WAR并更改您的POM,直到它不再包含在内。
要了解其中包含的原因,您的战争模块中的mvn dependency:tree
可以提供帮助。
如果您无法通过查看WAR文件来解决这个问题,请将类别org.jboss.modules的日志记录设置为TRACE,并在日志文件中搜索哪些类加载器加载类org.dom4j.DocumentFactory。