Seam Solder classloading issue on JBoss6
Hi,
I encountered a weird issue when deploying one of the modules of our project on a JBossAS6-Final after I had just added Seam 3 as a dependency to the Maven POM file.
There seems to be a conflict between Seam Solder and the JODReports library, that itself depends on jython and freemarker. The deployment fails with a NoClassDefFoundError caused by a missing class org.python.core.PyException. In an attempt to solve this I explicitly added jython 2.2 as a dependency to the pom, but the deployment now fails with a NoClassDefFoundError caused by freemarker.ext.jdom.NodeListModel$AttributeXMLOutputter. This is strange, because this class is clearly part of the deployed package. Somehow, just adding Seam Solder to the project prevents a class on the classpath from being loaded. In the maven tree no conflicts are visible.
I have stripped down the module to the simplest pom file that can still reproduce the issue. Can someone explain me what's happening and - if possible - how I can find a workaround? It is currently blocking us from using Seam 3. To reproduce the error I deployed a package that was built with the following pom.xml and contained a single EJB with a local interface and nothing more than a doNothing() method.
Thanks in advance.
<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>eu.eee.synaptiq</groupId>
<artifactId>seam-solder-compatibility</artifactId>
<name>Seam solder compatibility check</name>
<version>0.1</version>
<packaging>jar</packaging>
<properties>
<jdk.source>1.6</jdk.source>
<jdk.target>1.6</jdk.target>
</properties>
<repositories>
<repository>
<id>repository.jboss.org</id>
<name>JBoss Repository</name>
<url>http://repository.jboss.org/nexus/content/groups/public-jboss</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<build>
<finalName>
${project.artifactId}-${project.version}
</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${jdk.source}</source>
<target>${jdk.target}</target>
<encoding>utf-8</encoding>
<debug>${jdk.debug}</debug>
<optimize>${jdk.optimize}</optimize>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<artifact>eu.eee.synaptiq:seam-solder-compatibility</artifact>
<excludes>
<exclude>META-INF/ejb-jar.xml</exclude>
<exclude>META-INF/beans.xml</exclude>
</excludes>
</filter>
</filters>
<shadedArtifactAttached>true</shadedArtifactAttached>
<shadedClassifierName>component</shadedClassifierName>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.jboss.ejb3</groupId>
<artifactId>jboss-ejb3-api</artifactId>
<scope>provided</scope>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>org.jboss.seam.solder</groupId>
<artifactId>seam-solder</artifactId>
<version>3.0.0.Final</version>
</dependency>
<dependency>
<groupId>net.sf.jodreports</groupId>
<artifactId>jodreports</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>com.artofsolving</groupId>
<artifactId>jodconverter</artifactId>
<version>2.2.1</version>
</dependency>
<dependency>
<groupId>org.python</groupId>
<artifactId>jython</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
</project>
