[HADOOP-2192] dfs mv command differs from POSIX standards

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.15.1, 0.16.0
• Fix Version/s: 0.17.0
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: this patch makes dfs -mv more like linux mv command getting rid of unnecessary output in dfs -mv and returns an error message when moving non existent files/directories --- mv: cannot stat "filename": No such file or directory.
• Assignee: Mahadev Konar
• Reporter: Mukund Madhugiri
• Created: 12/Nov/07 19:05
• Updated: 02/May/13 02:29
• Resolved: 20/Feb/08 18:10

Description

Assuming the dfs commands follow POSIX standards, there are some problems with the DFS mv command. I compared the DFS output with that of RHEL 4u5

1. mv a file:
Linux: No output
DFS: Renamed /testarea/hadoop-site.xml to test

2. mv a file/directory that does not exist. The DFS file does not exist, but the output says it renamed the file:
Linux: mv: cannot stat `testarea/one': No such file or directory
DFS: mv: Rename failed /testarea/one

3. mv a directory to another directory:
Linux: No output
DFS: Renamed /testarea to testarea2

Issue Links

• is depended upon by: HADOOP-1677 improve semantics of the hadoop dfs command
• relates to: HADOOP-9382 Add dfs mv overwrite option