I double checked the username and the password. All are correct. I deleted the jboss-ds.xml and manually created the Datasource in JBoss Web Admin Console. It is UP~. It sounded great but the nightmare hasn't ended. When I deployed the WAR file, it showed the context DukeBankWeb DOWN. The log: java.lang.RuntimeException: org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS): | | *** DEPLOYMENTS IN ERROR: Name -> Error | | vfszip:/C:/jboss/server/default/deploy/DukeBankWeb.war/ -> org.jboss.deployers.spi.DeploymentException: Error deploying: persistence.unit:unitName=#DukeBankEjbPU | | | DEPLOYMENTS IN ERROR: | Deployment "vfszip:/C:/jboss/server/default/deploy/DukeBankWeb.war/" is in error due to the following reason(s): java.lang.IllegalStateException: persistence.unit:unitName=#DukeBankEjbPU is already installed. | | at org.jboss.profileservice.management.upload.remoting.StreamingDeploymentTarget.invoke(StreamingDeploymentTarget.java:313) | at org.jboss.profileservice.management.upload.remoting.StreamingDeploymentTarget.start(StreamingDeploymentTarget.java:190) | at org.jboss.profileservice.management.upload.DeploymentProgressImpl.start(DeploymentProgressImpl.java:231) | at org.jboss.profileservice.management.upload.DeploymentProgressImpl.run(DeploymentProgressImpl.java:88) | at org.rhq.plugins.jbossas5.util.DeploymentUtils.run(DeploymentUtils.java:120) | at org.rhq.plugins.jbossas5.AbstractManagedDeploymentComponent.invokeOperation(AbstractManagedDeploymentComponent.java:181) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocationThread.call(ResourceContainer.java:482) | at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) | at java.util.concurrent.FutureTask.run(FutureTask.java:138) | at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) | at java.lang.Thread.run(Thread.java:619) | Caused by: org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS): | | *** DEPLOYMENTS IN ERROR: Name -> Error | | vfszip:/C:/jboss/server/default/deploy/DukeBankWeb.war/ -> org.jboss.deployers.spi.DeploymentException: Error deploying: persistence.unit:unitName=#DukeBankEjbPU | | | DEPLOYMENTS IN ERROR: | Deployment "vfszip:/C:/jboss/server/default/deploy/DukeBankWeb.war/" is in error due to the following reason(s): java.lang.IllegalStateException: persistence.unit:unitName=#DukeBankEjbPU is already installed. | | at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:993) | at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:939) | at org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:873) | at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.checkComplete(MainDeployerAdapter.java:128) | at org.jboss.profileservice.management.upload.remoting.AbstractDeployHandler.start(AbstractDeployHandler.java:265) | at org.jboss.profileservice.management.upload.remoting.AbstractDeployHandler.invoke(AbstractDeployHandler.java:177) | at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891) | at org.jboss.remoting.transport.local.LocalClientInvoker.invoke(LocalClientInvoker.java:106) | at org.jboss.remoting.Client.invoke(Client.java:1724) | at org.jboss.remoting.Client.invoke(Client.java:629) | at org.jboss.profileservice.management.upload.remoting.StreamingDeploymentTarget.invoke(StreamingDeploymentTarget.java:305) | ... 15 more | What is my problem? How can I solve it? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4251135#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...