[HDFS-9123] Copying from the root to a subdirectory should be forbidden

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: fs
• Labels: supportability
• Hadoop Flags: Reviewed
• Assignee: Wei-Chiu Chuang
• Reporter: Wei-Chiu Chuang
• Created: 22/Sep/15 16:56
• Updated: 02/Oct/19 17:15
• Resolved: 25/Sep/15 04:53

Description

HDFS forbids copying from a directory to its subdirectory (e.g. hdfs dfs -cp /abc /abc/xyz) as otherwise it could cause infinite copying (/abc/xyz/xyz, /abc/xyz/xyz, /abc/xyz/xyz/xyz,... etc)

However, the existing path validation fails if the source path is the root, causing infinite copying, until the disk space is filled up.