Raised exception while starting the application. Fix the error and restart.

Message
Handler
org.fao.geonet.Geonetwork
Exception
java.lang.NullPointerException
Stack
java.lang.NullPointerException
	at org.fao.geonet.kernel.search.spatial.SpatialIndexWriter.buildData(SpatialIndexWriter.java:600)
	at org.fao.geonet.kernel.search.spatial.SpatialIndexWriter.insertFeatureInIndex(SpatialIndexWriter.java:591)
	at org.fao.geonet.kernel.search.spatial.SpatialIndexWriter.populateIndex(SpatialIndexWriter.java:447)
	at org.fao.geonet.kernel.search.spatial.SpatialIndexWriter.getIndex(SpatialIndexWriter.java:406)
	at org.fao.geonet.kernel.search.SearchManager$Spatial.<init>(SearchManager.java:1603)
	at org.fao.geonet.kernel.search.SearchManager.initNonStaticData(SearchManager.java:507)
	at org.fao.geonet.kernel.search.SearchManager.init(SearchManager.java:488)
	at org.fao.geonet.Geonetwork.start(Geonetwork.java:299)
	at org.fao.geonet.Geonetwork.start(Geonetwork.java:117)
	at jeeves.server.JeevesEngine.initAppHandler(JeevesEngine.java:457)
	at jeeves.server.JeevesEngine.init(JeevesEngine.java:193)
	at jeeves.server.sources.http.JeevesServlet.init(JeevesServlet.java:80)
	at javax.servlet.GenericServlet.init(GenericServlet.java:143)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1109)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1061)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:958)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4625)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4933)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:171)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:710)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:687)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:661)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1016)
	at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1903)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)