HDDS-10508. OmUtils.getAllOMHAAddresses may throw NPE (#6884)

hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/OmUtils.java

@@ -855,6 +855,12 @@ public static List<OMNodeDetails> getAllOMHAAddresses(OzoneConfiguration conf,
       try {
         OMNodeDetails omNodeDetails = OMNodeDetails.getOMNodeDetailsFromConf(
             conf, omServiceId, nodeId);
+        if (omNodeDetails == null) {
+          LOG.error(
+              "There is no OM configuration for node ID {} in ozone-site.xml.",
+              nodeId);
+          continue;
+        }
         if (decommissionedNodeIds.contains(omNodeDetails.getNodeId())) {
           omNodeDetails.setDecommissioningState();
         }