[HADOOP-9438] LocalFileContext does not throw an exception on mkdir for already existing directory

• Type: Bug
• Status: Patch Available
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 2.0.3-alpha
• Labels: BB2015-05-TBR
• Assignee: Unassigned
• Reporter: Robert Joseph Evans
• Created: 26/Mar/13 18:31
• Updated: 13/Jun/16 00:33

Description

according to
http://hadoop.apache.org/docs/current/api/org/apache/hadoop/fs/FileContext.html#mkdir%28org.apache.hadoop.fs.Path,%20org.apache.hadoop.fs.permission.FsPermission,%20boolean%29

should throw a FileAlreadyExistsException if the directory already exists.

I tested this and

FileContext lfc = FileContext.getLocalFSFileContext(new Configuration());
Path p = new Path("/tmp/bobby.12345");
FsPermission cachePerms = new FsPermission((short) 0755);
lfc.mkdir(p, cachePerms, false);
lfc.mkdir(p, cachePerms, false);

never throws an exception.

Issue Links

• is depended upon by: YARN-112 Race in localization can cause containers to fail
• is duplicated by: HDFS-4619 No Exception is thrown if we try to create directory using FileContext (create) on RawLocalFileSystem. Even if the directory already exists.
• is related to: HADOOP-9361 Strictly define the expected behavior of filesystem APIs and write tests to verify compliance