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java.lang.NullPointerException
java.lang.NullPointerException: 	at org.apache.hadoop.yarn.server.timeline.MemoryTimelineStore.getDomains(MemoryTimelineStore.java:244)	at org.apache.hadoop.yarn.server.timeline.TimelineDataManager.getDomains(TimelineDataManager.java:383)	at org.apache.hadoop.yarn.server.timeline.webapp.TimelineWebServices.getDomains(TimelineWebServices.java:353)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)	at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:886)	at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834)	at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795)	at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:163)	at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)	at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)	at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:96)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:572)	at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationFilter.doFilter(DelegationTokenAuthenticationFilter.java:269)	at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:542)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1204)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at org.mortbay.jetty.Server.handle(Server.java:326)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)	at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)	at org.mortbay.jetty.security.SslSocketConnector$SslConnection.run(SslSocketConnector.java:713)	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)