hadoop-yetus commented on a change in pull request #533: HADOOP-14630 Contract
Tests to verify create, mkdirs and rename under a file is forbidden
URL: https://github.com/apache/hadoop/pull/533#discussion_r317322338
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File path:
hadoop-common-project/hadoop-common/src/site/markdown/filesystem/filesystem.md
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@@ -530,14 +530,21 @@ on the filesystem.
### `boolean mkdirs(Path p, FsPermission permission)`
-Create a directory and all its parents
+Create a directory and all its parents.
#### Preconditions
+The path must either be a directory or not exist
+
if exists(FS, p) and not isDir(FS, p) :
raise [ParentNotDirectoryException, FileAlreadyExistsException,
IOException]
+No ancestor may be a file
+
+ forall d = ancestors(FS, p) :
Review comment:
whitespace:end of line
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