YARN-11942. Fix ConcurrentModificationException in NodeAttributesManagerImpl.internalUpdateAttributesOnNodes() (apache#8354). Contributed by jiejia

Reviewed-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Ayush Saxena <ayushsaxena@apache.org>

Author: jiajie999

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/NodeAttributesManagerImpl.java

@@ -211,7 +211,7 @@ protected void internalUpdateAttributesOnNodes(
           new HashMap<String, Set<NodeAttribute>>();
       nodeAttributeMapping.forEach((k, v) -> {
         Host node = nodeCollections.get(k);
-        newNodeToAttributesMap.put(k, node.attributes.keySet());
+        newNodeToAttributesMap.put(k, new HashSet<>(node.attributes.keySet()));
       });
 
       // Notify RM