JBoss AS 7 plug-in for JBoss ON continues to report server resource as down after server's authentication service has been restored

Issue

• We have some InvalidPluginConfigurationException
• When trying to send command using server user-interface (UI), it doesn't work anymore
• Monitoring is broken
• Monitoring is suddenly broken for JBoss application server targets
• Server resource continues to be reported as down

• We observe the following exception error in agent log:

  ERROR [ResourceContainer.invoker.daemon-5835] (rhq.modules.plugins.jbossas7.BaseServerComponent)- Failed to read attribute [domain-config-file]: org.rhq.core.pluginapi.inventory.InvalidPluginConfigurationException: Credentials for plugin to connect to AS7 management interface are invalid - update Connection Settings with valid credentials.
  org.rhq.core.pluginapi.inventory.InvalidPluginConfigurationException: Credentials for plugin to connect to AS7 management interface are invalid - update Connection Settings with valid credentials.
      at org.rhq.modules.plugins.jbossas7.ASConnection.handleAuthorizationFailureResponse(ASConnection.java:341)
      at org.rhq.modules.plugins.jbossas7.ASConnection.executeRaw(ASConnection.java:266)
      at org.rhq.modules.plugins.jbossas7.ASConnection.execute(ASConnection.java:433)
      at org.rhq.modules.plugins.jbossas7.ASConnection.execute(ASConnection.java:374)
      at org.rhq.modules.plugins.jbossas7.BaseComponent.readAttribute(BaseComponent.java:745)
      at org.rhq.modules.plugins.jbossas7.BaseServerComponent.collectConfigTrait(BaseServerComponent.java:626)
      at org.rhq.modules.plugins.jbossas7.HostControllerComponent.getValues(HostControllerComponent.java:65)
      ...