Dom4J IllegalAccessError - Seam on JBoss 7部署错误

Question

我正在将遗留应用程序迁移到Maven (希望稍后远离Seam)。已经有很多故障和故障，AFAIK Seam对于它将使用的依赖版本确实是变化无常的。

这个最近的错误我搞不清楚。因此，我对我的(EJB) Jar、War和Seam.jar有了一个耳闻，再加上lib/文件夹。现在，我实际上将Dom4J作为scope=provided的依赖项，因为JBoss as 7.1提供了1.6.1版本。它被包含在lib/无论如何，我还没有弄清楚原因。

但是，当我从lib/中删除所有多余的jars时，也会出现同样的错误。

重申一下，当使用Ant构建文件构建时，这个应用程序以前运行过。不过，Maven生产的EAR不会部署。我听说过类似的错误(但不是完全相同的)，依赖关系在类路径中加倍。我已经检查过(在从lib/中删除它之后)，除了JBoss的模块之外，应该没有其他内容。

更新： POM结构:Super是所有模块的父级，具有DependencyManagement，并且还包含模块(目前而言)。模块:核心-ejb有大量的代码和大量的依赖项，大部分是在JBoss/模块中提供的。核心网产生战争，在核心EJB上有发展.Project包括Core，Project依赖于Core，并使用阴影插件将它们合并在一起(!)。核心-耳生成耳朵从阴影-项目-ejb和项目-web。(结构是疯狂的，但受遗留应用程序的支配)。

12:42:37,694 INFO  [javax.servlet.ServletContextListener] (MSC service thread 1-6) Welcome to Seam 2.3.1.Final
12:42:38,745 INFO  [org.jboss.seam.init.Initialization] (MSC service thread 1-6) reading /WEB-INF/components.xml
12:42:38,749 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/]] (MSC service thread 1-6) Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener: java.lang.IllegalAccessError: tried to access class org.dom4j.io.SAXHelper from class org.dom4j.io.SAXReader
    at org.dom4j.io.SAXReader.createXMLReader(SAXReader.java:894) [dom4j-1.6.1.jar:1.6.1]
    at org.dom4j.io.SAXReader.getXMLReader(SAXReader.java:715) [dom4j-1.6.1.jar:1.6.1]
    at org.dom4j.io.SAXReader.read(SAXReader.java:435) [dom4j-1.6.1.jar:1.6.1]
    at org.dom4j.io.SAXReader.read(SAXReader.java:343) [dom4j-1.6.1.jar:1.6.1]
    at org.jboss.seam.util.XML.getRootElement(XML.java:24) [jboss-seam-2.3.1.Final.jar:2.3.1.Final]
    at org.jboss.seam.init.Initialization.initComponentsFromXmlDocument(Initialization.java:227) [jboss-seam-2.3.1.Final.jar:2.3.1.Final]
    at org.jboss.seam.init.Initialization.create(Initialization.java:133) [jboss-seam-2.3.1.Final.jar:2.3.1.Final]
    at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:36) [jboss-seam-2.3.1.Final.jar:2.3.1.Final]
    at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:3392) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:3850) [jbossweb-7.0.13.Final.jar:]
    at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:90) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_80]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_80]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_80]

mvn依赖项:树输出，清除一个错误(但仍然是相同的错误)：

[INFO] ------------------------------------------------------------------------
[INFO] Building Core Framework 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ Core ---
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Core EJB module 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ Core-ejb ---
[INFO] com.mycomp:Core-ejb:ejb:1.0-SNAPSHOT
[INFO] +- org.hibernate:hibernate-core:jar:4.2.0.Final:provided
[INFO] |  \- (dom4j:dom4j:jar:1.6.1:provided - omitted for duplicate)
[INFO] +- dom4j:dom4j:jar:1.6.1:provided
[INFO] \- org.jdom:jdom:jar:1.1.2:provided
[INFO]    \- jaxen:jaxen:jar:1.1.3:provided
[INFO]       \- (dom4j:dom4j:jar:1.6.1:provided - omitted for duplicate)
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Core Web module 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ Core-web ---
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Project EJB module 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ project-ejb ---
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Project Web module 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ project-web ---
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Core EAR module 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.10:tree (default-cli) @ Core-ear ---
[WARNING] Using Maven 2 dependency tree to get verbose output, which may be inconsistent with actual Maven 3 resolution

核耳POM

...
<dependencies>
    <!-- project specific dependencies -->
    <dependency>
        <groupId>com.mycomp</groupId>
        <artifactId>project-web</artifactId>
        <version>${logis.artifact.version}</version>
        <type>war</type>
    </dependency>
    <dependency>
        <groupId>com.mycomp</groupId>
        <artifactId>project-ejb</artifactId>
        <version>${logis.artifact.version}</version>
        <type>ejb</type>
    </dependency>

    <!-- Seam dependency -->
    <dependency>
        <groupId>org.jboss.seam</groupId>
        <artifactId>jboss-seam</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-ear-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <!-- Tell Maven we are using Java EE 6 -->
                <version>6</version>
                <!-- Use Java EE ear libraries as needed. Java EE ear libraries are 
                    in easy way to package any libraries needed in the ear, and automatically 
                    have any modules (EJB-JARs and WARs) use them -->
                <defaultLibBundleDir>lib</defaultLibBundleDir>
                <!-- See maven docs; Necessary because we CAN'T have 2 jboss-seam.jars 
                    in the same EAR -->
                <skinnyWars>true</skinnyWars>
                <initializeInOrder>true</initializeInOrder>
                <modules>
                    <!-- Explicitly excluding core framework artifacts, as they get merged 
                        (shaded) into the project artifacts -->
                    <ejbModule>
                        <groupId>com.mycomp</groupId>
                        <artifactId>core-ejb</artifactId>
                        <excluded>true</excluded>
                    </ejbModule>

                    <!-- <webModule>
                        <groupId>com.mycomp</groupId>
                        <artifactId>core-web</artifactId>
                        <excluded>true</excluded>
                    </webModule> -->

                    <!-- Project specific part -->
                    <ejbModule>
                        <groupId>com.mycomp</groupId>
                        <artifactId>project-ejb</artifactId>
                        <!-- Manually set jar name, because many JndiNames in logis hard-code 
                            that name -->
                        <bundleFileName>core.jar</bundleFileName>
                    </ejbModule>
                    <webModule>
                        <groupId>com.mycomp</groupId>
                        <artifactId>project-web</artifactId>
                        <contextRoot>/</contextRoot>
                    </webModule>

                    <!-- Need to include Seam as a module so it will be "executed" and 
                        can initialize itself -->
                    <jarModule>
                        <groupId>org.jboss.seam</groupId>
                        <artifactId>jboss-seam</artifactId>
                        <includeInApplicationXml>true</includeInApplicationXml>
                        <bundleDir>/</bundleDir>
                    </jarModule>
                </modules>
            </configuration>
        </plugin>
...

Answer 1

看起来它与类路径上的多个版本发生了冲突。

有一个特定于公司的模块，就是把一堆罐子卷到一个模块中。在确保只有一个jdom-*..jar在路径上之后，它就成功了。