5 Replies Latest reply on Jun 6, 2011 5:35 AM by Jonne Deprez

    Seam Solder classloading issue on JBoss6

    Jonne Deprez Newbie

      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>