LinkageError while using ShrinkWrap classes in Arquillian --------------------------------------------------------- Key: FORGE-908 URL: https://issues.jboss.org/browse/FORGE-908 Project: Forge Issue Type: Bug Components: Java EE APIs Affects Versions: 2.0.0.Alpha4 Reporter: George Gastaldi Assignee: Lincoln Baxter III In javaee-tests, if you remove the @Ignore from the test test.org.jboss.forge.javaee.servlet.ServletFacetTest.testWebXMLCreatedWhenInstalled() you get the following exception: {code} Caused by: java.lang.LinkageError: loader constraint violation: loader (instance of org/jboss/modules/ModuleClassLoader) previously initiated loading for a different type with name "org/jboss/shrinkwrap/descriptor/api/webapp30/WebAppDescriptor" at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:344) at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:422) at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:260) at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:75) at org.jboss.modules.Module.loadModuleClass(Module.java:528) at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:188) at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:444) at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:432) at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:399) at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:374) at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:119) at test.org.jboss.forge.javaee.servlet.ServletFacetTest.testWebXMLCreatedWhenInstalled(ServletFacetTest.java:63) ... 88 more {code}