Catalin Moga [http://community.jboss.org/people/mcatalin23] created the discussion "ClassNotFoundException when deploying ear file on Jboss AS 7" To view the discussion, visit: http://community.jboss.org/message/617351#617351 -------------------------------------------------------------- I included my ear file into <jboss_home>\standalone\deployments\ folder. The ear file was generated with Jboss Developer Studio version 4.0.0.GA. I'm getting following error when starting Jboss 7 as standalone: 12:07:08,729 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-1) MSC00001: Failed to start service jboss.deployment.unit."<ear_name>.ear".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."<ear_name>.ear".INSTALL: Failed to process phase INSTALL of deployment "<ear_name>.ear"     at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121)     at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)     at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_23]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_23]     at java.lang.Thread.run(Thread.java:662) [:1.6.0_23] Caused by: java.lang.RuntimeException: Error getting reflective information for class <my_class_name>     at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:70)     at org.jboss.as.ee.component.EEModuleClassDescription$DefaultConfigurator.configure(EEModuleClassDescription.java:144)     at org.jboss.as.ee.component.EEClassConfigurationProcessor.processClasses(EEClassConfigurationProcessor.java:133)     at org.jboss.as.ee.component.EEClassConfigurationProcessor.deploy(EEClassConfigurationProcessor.java:76)     at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115)     ... 5 more *Caused by: java.lang.NoClassDefFoundError: Lorg/apache/log4j/Category;*     at java.lang.Class.getDeclaredFields0(Native Method) [:1.6.0_23]     at java.lang.Class.privateGetDeclaredFields(Class.java:2291) [:1.6.0_23]     at java.lang.Class.getDeclaredFields(Class.java:1743) [:1.6.0_23]     at org.jboss.as.server.deployment.reflect.ClassReflectionIndex.<init>(ClassReflectionIndex.java:57)     at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:66)     ... 9 more *Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Category from [Module "deployment.<ear_name>.ear.<jar_name>.jar:main" from Service Module Loader]*     at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191)     at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)     at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)     at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)     at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)     ... 14 more Following instructions from https://docs.jboss.org/author/display/AS7/How+do+I+migrate+my+application... https://docs.jboss.org/author/display/AS7/How+do+I+migrate+my+application... section "+How to find the JBoss module dependency"+ I searched for the jboss 7 module that contains the class *org.apache.log4j.Category* The class is included into following jar: <jboss_home>\modules\org\apache\log4j\main\log4j-1.2.16.jar like *Dependencies: org.apache.log4j* I did all these steps from the documentation but I still get the same error ClassNotFoundException. I have tried to update the main MANIFEST.MF file from the ear and also the MANIFEST.MF file from jar included into the ear that requires the class. The MANIFEST.MF file I used is attached. Where is the problem regarding this issue? Is anything wrong with my configuration for manifest file? I manually edited the manifest file. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/617351#617351] Start a new discussion in JBoss AS7 Development at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]