li-leyang commented on code in PR #4181:
URL: https://github.com/apache/hadoop/pull/4181#discussion_r869561085


##########
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/InodeTree.java:
##########
@@ -682,6 +736,25 @@ protected InodeTree(final Configuration config, final 
String viewName,
     }
   }
 
+  private Collection<LinkEntry> getLinkEntries(List<LinkEntry> linkEntries) {
+    if (isNestedMountPointSupported) {
+      Set<LinkEntry> sortedLinkEntries = new TreeSet<>((o1, o2) -> {
+        if (o1 == null) {
+          return -1;
+        }
+        if (o2 == null) {
+          return 1;
+        }
+        String src1 = o1.getSrc().toLowerCase();

Review Comment:
   Good catch, changed.



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