[HDFS-11009] Add a tool to reconstruct block meta file from CLI

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha2
• Component/s: datanode
• Labels: supportability
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Xiao Chen
• Reporter: Xiao Chen
• Created: 14/Oct/16 01:04
• Updated: 14/Nov/16 05:08
• Resolved: 19/Oct/16 05:43

Description

If the block file on local disk presents, but the meta file is missing, it's theoretically possible to manually restore the meta file and have the block readable.
This jira is to propose to add such a tool to do that.