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java.lang.NullPointerException: 	at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.reset(HotDeployUtil.java:53)	at com.liferay.portal.spring.context.PortalContextLoaderListener.contextDestroyed(PortalContextLoaderListener.java:139)	at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4859)	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478)	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:224)	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:159)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:585)	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1794)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:745)