WARN java.lang.NoClassDefFoundError: Failed to link javax/servlet/jsp/tagext/TagSupport --------------------------------------------------------------------------------------- Key: WFLY-14302 URL: https://issues.redhat.com/browse/WFLY-14302 Project: WildFly Issue Type: Bug Components: Class Loading Affects Versions: 22.0.0.Final Reporter: Josep Jiménez Assignee: Richard Opalka Priority: Major Attachments: demo.zip, page1.png, page2.png, screeenshot-2.png, screenshot-1.png, server.log Over V16 and V21 the same project run correctly. The project uses javax.servlet.jsp.tagext.TagSupport During the deploiment shows this WARN the same times number of TagLib are defined on two tld's files of project. 11:52:58,637 WARN  [org.jboss.modules.define] (MSC service thread 1-8) Failed to define class webui.tags.framework.BPlanSelector in Module "deployment.Awebpfcw2-1.0.war" from Service Module Loader: java.lang.NoClassDefFoundError: Failed to link webui/tags/framework/BPlanSelector (Module "deployment.Awebpfcw2-1.0.war" from Service Module Loader): javax/servlet/jsp/tagext/TagSupport11:52:58,637 WARN  [org.jboss.modules.define] (MSC service thread 1-8) Failed to define class webui.tags.framework.BPlanSelector in Module "deployment.Awebpfcw2-1.0.war" from Service Module Loader: java.lang.NoClassDefFoundError: Failed to link webui/tags/framework/BPlanSelector (Module "deployment.Awebpfcw2-1.0.war" from Service Module Loader): javax/servlet/jsp/tagext/TagSupport at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1095) at org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:424) at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:555) at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:339) at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:126) at org.jboss.modules.Module.loadModuleClass(Module.java:753) at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:247) at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410) at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398) at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:468) at org.jboss.as.ee@22.0.0.Final//org.jboss.as.ee.utils.ClassLoadingUtils.loadClass(ClassLoadingUtils.java:21) at org.jboss.as.ee@22.0.0.Final//org.jboss.as.ee.utils.ClassLoadingUtils.loadClass(ClassLoadingUtils.java:14) at org.jboss.as.ee@22.0.0.Final//org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.processComponentConfig(InterceptorAnnotationProcessor.java:84) at org.jboss.as.ee@22.0.0.Final//org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.deploy(InterceptorAnnotationProcessor.java:77) at org.jboss.as.server@14.0.0.Final//org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:182) at org.jboss.msc@1.4.12.Final//org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1739) at org.jboss.msc@1.4.12.Final//org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1701) at org.jboss.msc@1.4.12.Final//org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1559) at org.jboss.threads@2.4.0.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990) at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486) at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377) at java.base/java.lang.Thread.run(Thread.java:832)