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java.lang.NullPointerException: 	at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:881)	at com.springsource.server.web.core.internal.WebAppClassLoaderDelegateHook.addWebApplication(WebAppClassLoaderDelegateHook.java:56)	at com.springsource.server.web.core.internal.WebBundleLifecycleListener.onStarted(WebBundleLifecycleListener.java:88)	at com.springsource.kernel.install.artifact.internal.ArtifactStateMonitor.onStarted(ArtifactStateMonitor.java:241)	at com.springsource.kernel.install.artifact.internal.AbstractInstallArtifact.asyncStartSucceeded(AbstractInstallArtifact.java:245)	at com.springsource.kernel.install.artifact.internal.AbstractInstallArtifact$StateMonitorSignal.signalSuccessfulCompletion(AbstractInstallArtifact.java:207)	at com.springsource.kernel.core.internal.BundleStartTracker$1.run(BundleStartTracker.java:150)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:637)