[HDFS-6041] Downgrade/Finalize should rename the rollback image instead of purging it

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Jing Zhao
• Created: 03/Mar/14 20:01
• Updated: 04/Mar/14 04:43
• Resolved: 04/Mar/14 04:43

Description

After we do rollingupgrade downgrade/finalize, instead of purging the rollback image, we'd better rename it back to normal image, since the rollback image can be the most recent checkpoint.