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java.lang.NullPointerException at oracle.sysman.emSDK.emd.comm.EMDClient.getURL(EMDClient.java:1570) at oracle.sysman.emSDK.emd.comm.EMDClient.getConnection(EMDClient.java:1266) at oracle.sysman.emSDK.emd.comm.EMDClient.getConnection(EMDClient.java:1242) at oracle.sysman.emSDK.emd.comm.EMDClient.getResponseForRequest(EMDClient.java:1689) at oracle.sysman.emSDK.emd.comm.EMDClient.getMetrics(EMDClient.java:981) at oracle.sysman.emo.perf.metric.rt.DbHomeTab._getAllData(DbHomeTab.java:340) at oracle.sysman.emo.perf.metric.rt.DbHomeTab.getData(DbHomeTab.java:154) at oracle.sysman.emo.perf.metric.eng.MetricCached.collectCachedData(MetricCached.java:416) at oracle.sysman.emo.perf.metric.eng.MetricCollectorThread._collectCachedData(MetricCollectorThread.java:605) at oracle.sysman.emo.perf.metric.eng.MetricCollectorThread.run(MetricCollectorThread.java:325) at java.lang.Thread.run(Thread.java:595)