Deploying an application with validation can result in subsequent deployments failing with "Error in accessing application metadata:" There is no work around except to take the server down, remove the deployed ear and bring the server up again.

14:41:21,125 INFO [EARDeployer] Init J2EE application: file:/C:/jboss-4.0.1/server/default/deploy/carlApplication.ear
14:41:24,687 WARN [verifier] EJB spec violation:
Bean : DemoBean
Method : public abstract String doIt(String, String;, [Z) throws RemoteException
Section: 7.10.5
Warning: The methods defined in the remote interface must have a matching method in the bean's class with the same name
and same number and types of arguments.

14:41:24,718 ERROR [MainDeployer] could not create deployment: file:/C:/jboss-4.0.1/server/default/tmp/deploy/tmp54847ca
rlApplication.ear-contents/carlEjbLayer.jar
org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for error messages.
at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:553)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:918)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:910)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:774)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:738)
at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:144)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:122)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:131)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy8.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:305)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:481)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:20
4)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:215)

at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:194)
14:41:24,718 ERROR [MainDeployer] could not create deployment: file:/C:/jboss-4.0.1/server/default/deploy/carlApplicatio
n.ear
org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for error messages.
at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:553)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:918)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:910)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:774)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:738)
at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:144)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:122)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:131)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy8.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:305)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:481)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:20
4)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:215)

at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:194)
14:47:48,484 WARN [ServiceController] Ignoring request to stop nonexistent service: null
14:47:48,484 INFO [EJBDeployer] Undeploying: file:/C:/jboss-4.0.1/server/default/tmp/deploy/tmp54847carlApplication.ear
-contents/carlEjbLayer.jar
14:47:48,484 WARN [ServiceController] Ignoring request to stop nonexistent service: null
14:47:48,484 WARN [ServiceController] Ignoring request to stop nonexistent service: jboss.j2ee:service=EARDeployment,ur
l='carlApplication.ear'
14:47:51,078 WARN [ServiceController] Ignoring request to destroy nonexistent service: null
14:47:51,078 WARN [ServiceController] Ignoring request to remove nonexistent service: null
14:47:51,078 INFO [EARDeployer] Undeploying J2EE application, destroy step: file:/C:/jboss-4.0.1/server/default/deploy/
carlApplication.ear
14:47:51,078 WARN [ServiceController] Ignoring request to destroy nonexistent service: jboss.j2ee:service=EARDeployment
,url='carlApplication.ear'
14:47:51,078 WARN [ServiceController] Ignoring request to remove nonexistent service: jboss.j2ee:service=EARDeployment,
url='carlApplication.ear'
14:47:51,078 WARN [DeploymentInfo] Could not delete file:/C:/jboss-4.0.1/server/default/tmp/deploy/tmp54847carlApplicat
ion.ear restart will delete it
14:47:51,109 INFO [EARDeployer] Init J2EE application: file:/C:/jboss-4.0.1/server/default/deploy/carlApplication.ear
14:47:51,187 INFO [EARDeployment] Registration is not done -> stop
14:47:51,203 ERROR [MainDeployer] Could not initialise deployment: file:/C:/jboss-4.0.1/server/default/deploy/carlApplic
ation.ear
org.jboss.deployment.DeploymentException: Error in accessing application metadata: ; - nested throwable: (javax.manageme
nt.InstanceAlreadyExistsException: jboss.j2ee:service=EARDeployment,url='carlApplication.ear' already registered.)
at org.jboss.deployment.EARDeployer.init(EARDeployer.java:270)
at org.jboss.deployment.MainDeployer.init(MainDeployer.java:828)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:765)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:738)
at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:144)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:122)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:131)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy8.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:305)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:463)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:20
4)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:215)

at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:194)
Caused by: javax.management.InstanceAlreadyExistsException: jboss.j2ee:service=EARDeployment,url='carlApplication.ear' a
lready registered.
at org.jboss.mx.server.registry.BasicMBeanRegistry.add(BasicMBeanRegistry.java:755)
at org.jboss.mx.server.registry.BasicMBeanRegistry.registerMBean(BasicMBeanRegistry.java:211)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:144)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:122)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:131)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
at org.jboss.mx.server.MBeanServerImpl$3.run(MBeanServerImpl.java:1397)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:1392)
at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:359)
at org.jboss.deployment.EARDeployer.init(EARDeployer.java:262)
... 21 more