li-leyang commented on code in PR #4181:
URL: https://github.com/apache/hadoop/pull/4181#discussion_r869785802
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/InodeTree.java:
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@@ -133,6 +138,11 @@ public INode(String pathToNode, UserGroupInformation aUgi)
{
// and is read only.
abstract boolean isInternalDir();
+ /**
+ * INode representing a INodeDir which also contains a INodeLink(nested
mount point)
+ */
+ abstract boolean isDirAndLink();
+
// INode linking to another filesystem. Represented
// via mount table link config entries.
boolean isLink() {
Review Comment:
> In particular, I'd say that isLink should return true on all links
(internal & leaf)
Yeah, I've considered this but this involves refactoring in
traversal/resolve logic and also change the semantics of isLink() which returns
true for an internal node. (I am more concerned of this from traversal
perspective but i agree it is contradictory from definition perspective) So I
decided to create a new prop to identify internal node with mount point. But
the downside is I have to add additional check whenever x.isLink() is invoked.
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