[HDFS-4557] Fix FSDirectory#delete when INode#cleanSubtree returns 0

• 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: Jing Zhao
• Created: 06/Mar/13 03:13
• Updated: 08/Mar/13 13:14
• Resolved: 07/Mar/13 22:35

Description

Currently INode#cleanSubtree is used to delete files/directories and collect corresponding blocks for future deletion. Its return value can be 0 even if file/dir has been deleted because we save snapshot copies. This breaks the original logic in FSDirectory#delete since FSDirectory#delete expects a positive value from a successful deletion.