[HDFS-1088] Prevent renaming a symlink to its target

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.21.0
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Eli Collins
• Reporter: Eli Collins
• Created: 08/Apr/10 02:10
• Updated: 02/May/13 02:29
• Resolved: 21/Apr/10 07:20

Description

Here's the HDFS side of HADOOP-6563:

• Small bug fix for renaming a symlink to it's target
• Hdfs#getFileBlockLocations needs to use getUriPath() to ensure an absolute path is passed in. See minor change to INode#getPathNames, which now asserts instead of returning null and causing NPEs. This was exposed via calling FileContext#getFileBlockLocations using a symlink.
• Comment in FSImage around symlinks and image loading

Issue Links

• blocks: HADOOP-6563 Add more tests to FileContextSymlinkBaseTest that cover intermediate symlinks in paths
• is depended upon by: HADOOP-6703 Prevent renaming a file, symlink or directory to itself
• is part of: HDFS-254 Add more unit test for HDFS symlinks

Sub-Tasks

• Override TestFcHdfsSymlink#unwrapException: Closed