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java.lang.NullPointerException at oracle.sysman.eml.mntr.host.HostUtil.getMetricColumnTotal(HostUtil.java:837) at oracle.sysman.eml.host.HostSitemap.setMetricDataFromEMD(HostSitemap.java:1804) at oracle.sysman.eml.host.HostSitemap.<init>(HostSitemap.java:369) at oracle.sysman.eml.host.HostController.prepareData(HostController.java:167) at oracle.sysman.emSDK.svlt.PageHandler.handleRequest(PageHandler.java:419) at oracle.sysman.emSDK.svlt.EMServlet.myDoGet(EMServlet.java:728) at oracle.sysman.emSDK.svlt.EMServlet.doGet(EMServlet.java:307) at oracle.sysman.eml.app.Console.doGet(Console.java:271) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:848) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:341) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:852) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:285) at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:126) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192) at java.lang.Thread.run(Thread.java:534)