[HDFS-8673] HDFS reports file already exists if there is a file/dir name end with ._COPYING_

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.7.0
• Component/s: fs
• Assignee: Chen He
• Reporter: Chen He
• Created: 26/Jun/15 05:29
• Updated: 18/Mar/16 10:59

Description

Because CLI is using CommandWithDestination.java which add ".COPYING" to the tail of file name when it does the copy. It will cause problem if there is a file/dir already called *.COPYING on HDFS.

For file:
-bash-4.1$ hadoop fs -put 5M /user/occ/
-bash-4.1$ hadoop fs -mv /user/occ/5M /user/occ/5M.COPYING
-bash-4.1$ hadoop fs -ls /user/occ/
Found 1 items
rw-rr- 1 occ supergroup 5242880 2015-06-26 05:16 /user/occ/5M.COPYING
-bash-4.1$ hadoop fs -put 128K /user/occ/5M
-bash-4.1$ hadoop fs -ls /user/occ/
Found 1 items
rw-rr- 1 occ supergroup 131072 2015-06-26 05:19 /user/occ/5M

For dir:
-bash-4.1$ hadoop fs -mkdir /user/occ/5M.COPYING
-bash-4.1$ hadoop fs -ls /user/occ/
Found 1 items
drwxr-xr-x - occ supergroup 0 2015-06-26 05:24 /user/occ/5M.COPYING
-bash-4.1$ hadoop fs -put 128K /user/occ/5M
put: /user/occ/5M.COPYING already exists as a directory
-bash-4.1$ hadoop fs -ls /user/occ/
(/user/occ/5M.COPYING is gone)

Issue Links

• is related to: HADOOP-12046 Avoid creating "._COPYING_" temporary file when copying file to Swift file system