wildfly 10: java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory

Question

I have a maven application that works fine in wildfly 8.2, but when Ideployed it in wildfly 10 this error happened:

[2016-02-21 11:22:08,411] Artifact Sarama         


        

Answer 1

I just made all hibernate dependencies provided scope and problem solved!

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.1.0.Final</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.2.4.Final</version>
            <scope>provided</scope>
        </dependency>

        <!-- for JPA, use hibernate-entitymanager instead of hibernate-core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.1.0.Final</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-ehcache</artifactId>
            <version>5.1.0.Final</version>
            <scope>provided</scope>
        </dependency>

Answer 2

If you are using hibernate-core as a dependency, you should make sure the scope is provided. The hibernate artifact has a version of dom4j as a dependency, by making changing the <scope> to provided resolves the conflict.

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.3.1.Final</version>
        <type>jar</type>
        <scope>provided</scope>
    </dependency>

I hope this makes you smile :)

Answer 3

I had the same problem but finally what I did is to remove (redundant) Hibernate libraries from pom.

As Wildfly is already using Hibernate as JPA provider (https://docs.jboss.org/author/display/WFLY10/JPA+Reference+Guide#JPAReferenceGuide-Introduction), you do not need to provide such classes at all (unless you are directly using Hibernate classes).

So the minimal config is working fine:

<project>
  <dependencies>
    <dependency>
      <groupId>javax</groupId>
      <artifactId>javaee-api</artifactId>
      <version>7.0</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>
</project>

And persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
         version="2.0">
<persistence-unit name="mysql_hbm" transaction-type="JTA">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <jta-data-source>java:/jdbc/MySqlDS</jta-data-source>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
        <property name="hibernate.show_sql" value="true"/>
    </properties>
</persistence-unit>

Tested on Wildfly 10.

Answer 4

There are two ways.

1 You create a META-INF folder in webapp folder. Later create jboss-deployment-structure.xml in META-INF folder.

jboss-deployment-structure.xml

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
    <deployment>
        <dependencies>
            <module name="org.dom4j"/>
        </dependencies>
    </deployment>
</jboss-deployment-structure>

or

2 if you added hibernate-core in pom xml then you edit this.

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.3.1.Final</version>
        <type>jar</type>
        <scope>provided</scope>
    </dependency>

Answer 5

adding below in 'jboss-deployment-structure.xml' under META-INF of my ear file resolved the issue and working in both weblogic & wildfly

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
    <deployment>
        <dependencies>
            <module name="org.dom4j" export="true"/>
        </dependencies>
    </deployment>
</jboss-deployment-structure>

Answer 6

Exclude dependency dom4j out of hibernate ones.

Check in resulting acme.war/WEB-INF/lib that there is no dom***.jar

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>4.3.8.Final</version>
    <exclusions>
        <exclusion>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.3.8.Final</version>
    <exclusions>
        <exclusion>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
        </exclusion>
    </exclusions>
</dependency>