[HDFS-4612] Not to use INode.getParent() when generating snapshot diff report

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Snapshot (HDFS-2802)
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Tsz-wo Sze
• Created: 19/Mar/13 08:34
• Updated: 25/Mar/13 13:25
• Resolved: 25/Mar/13 10:22

Description

With rename, an inode may have multiple access paths, i.e. multiple parents. In such case, INode.getParent() returns the parent in the current state but not the parents in the snapshots. Therefore, we cannot use INode.getParent() to generate snapshot diff report.