I am using Eclipse Java EE IDE for Web Developers. (Version: Indigo Service Release 1 Build id: 20110916-0149)

In installed the lastest available JBoss Tools (3.3.0.M3.2011-09-15_20-45-52-H23)

I created a server of type JBoss Runtime 6.x

I modified following values in the server editor:

Hostname:0.0.0.0

Never publish automatically

Startup Poller: web port

Shutdown poller: process termintated

JRebel integration: enabled

I manually copy paste my ear the first time in the deploy folder.
After I start the server, I can use the application in a browser.
When I start changing code I'm seeing the following stacktrace hidden in the error log:

"Error adding deployment folder to deployment scanner"
org.jboss.ide.eclipse.as.jmx.integration.JMXUtil$CredentialException
          at org.jboss.ide.eclipse.as.jmx.integration.JMXUtil.setCredentials(JMXUtil.java:91)
          at org.jboss.ide.eclipse.as.jmx.integration.JMXSafeRunner.run(JMXSafeRunner.java:64)
          at org.jboss.ide.eclipse.as.jmx.integration.JMXSafeRunner.run(JMXSafeRunner.java:52)
          at org.jboss.ide.eclipse.as.jmx.integration.JBossServerConnection.run(JBossServerConnection.java:97)
          at org.jboss.ide.eclipse.as.jmx.integration.JBossServerConnectionProvider.run(JBossServerConnectionProvider.java:58)
          at org.jboss.ide.eclipse.as.jmx.integration.JMXServerLifecycleListener.doDeploymentAddition(JMXServerLifecycleListener.java:69)
          at org.jboss.ide.eclipse.as.jmx.integration.JMXServerLifecycleListener.serverChanged(JMXServerLifecycleListener.java:55)
          at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager.serverChanged(UnitedServerListenerManager.java:128)
          at org.eclipse.wst.server.core.internal.ServerNotificationManager.broadcastChange(ServerNotificationManager.java:123)
          at org.eclipse.wst.server.core.internal.Server.fireServerStateChangeEvent(Server.java:714)
          at org.eclipse.wst.server.core.internal.Server.setServerState(Server.java:639)
          at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.setServerState(ServerBehaviourDelegate.java:143)
          at org.jboss.ide.eclipse.as.core.server.internal.DeployableServerBehavior.setServerStarted(DeployableServerBehavior.java:166)
          at org.jboss.ide.eclipse.as.core.server.internal.AbstractJBossBehaviourDelegate.setServerStarted(AbstractJBossBehaviourDelegate.java:137)
          at org.jboss.ide.eclipse.as.core.server.internal.AbstractJBossBehaviourDelegate$1.stateAsserted(AbstractJBossBehaviourDelegate.java:111)
          at org.jboss.ide.eclipse.as.core.server.internal.PollThread.alertListener(PollThread.java:255)
          at org.jboss.ide.eclipse.as.core.server.internal.PollThread.run(PollThread.java:181)

Thats very strange because I see to following line getting logged to the server.log:

09:51:31,553 INFO  [JMXConnector] starting JMXConnector on host 0.0.0.0:1090

I can connect to the JMX console with the default username and password using jVisualvm.
Why is it not working from within Eclipse?