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java.lang.NullPointerException: 	at	at com.liferay.portal.spring.context.PortalContextLoaderListener.contextDestroyed(	at org.apache.catalina.core.StandardContext.listenerStop(	at org.apache.catalina.core.StandardContext.stopInternal(	at org.apache.catalina.util.LifecycleBase.stop(	at org.apache.catalina.util.LifecycleBase.start(	at org.apache.catalina.core.ContainerBase.addChildInternal(	at org.apache.catalina.core.ContainerBase.addChild(	at org.apache.catalina.core.StandardHost.addChild(	at org.apache.catalina.startup.HostConfig.deployDescriptor(	at org.apache.catalina.startup.HostConfig$	at java.util.concurrent.Executors$	at	at java.util.concurrent.ThreadPoolExecutor.runWorker(	at java.util.concurrent.ThreadPoolExecutor$	at