org.netbeans.modules.portalpack.servers.core.common.DeploymentException: Undeployment failed.
   at org.netbeans.modules.portalpack.servers.core.JSR88DeploymentHandler.undeployApp(JSR88DeploymentHandler.java:235)
   at org.netbeans.modules.portalpack.servers.core.impl.j2eeservers.sunappserver.GlassFishServerDeployHandler._undeploy(GlassFishServerDeployHandler.java:366)
   at org.netbeans.modules.portalpack.servers.core.impl.j2eeservers.sunappserver.GlassFishServerDeployHandler.undeploy(GlassFishServerDeployHandler.java:300)
   at org.netbeans.modules.portalpack.servers.websynergy.impl.LiferayTaskHandler.undeploy(LiferayTaskHandler.java:520)
   at org.netbeans.modules.portalpack.servers.core.PSDeployerImpl$1.run(PSDeployerImpl.java:230)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)