[HDFS-1331] dfs -test should work like /bin/test

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.20.2, 2.0.2-alpha, 3.0.0-alpha1
• Fix Version/s: 2.0.3-alpha
• Component/s: tools
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: "test" will not print a warning for non-existent paths when testing for existence
• Assignee: Andy Isaacson
• Reporter: Allen Wittenauer
• Created: 04/Aug/10 21:48
• Updated: 12/May/16 18:13
• Resolved: 06/Nov/12 16:11

Description

hadoop dfs -test doesn't act like its shell equivalent, making it difficult to actually use if you are used to the real test command:

hadoop:
$hadoop dfs -test -d /nonexist; echo $?
test: File does not exist: /nonexist
255

shell:
$ test -d /nonexist; echo $?
1

a) Why is it spitting out a message? Even so, why is it saying file instead of directory when I used -d?

b) Why is the return code 255? I realize this is documented as '0' if true. But docs basically say the value is undefined if it isn't.

c) where is -f?

d) Why is empty -z instead of -s ? Was it a misunderstanding of the man page?

Issue Links

• is related to: HDFS-4104 dfs -test -d prints inappropriate error on nonexistent directory