[HDFS-15031] Allow BootstrapStandby to download FSImage if the directory is already formatted

• Type: Improvement
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Component/s: hdfs, namenode
• Assignee: Danny Becker
• Reporter: Danny Becker
• Created: 04/Dec/19 01:44
• Updated: 18/Dec/19 23:56

Description

Currently, BootstrapStandby will only download the latest FSImage if it has formatted the local image directory. This can be an issue when there are out of date FSImages on a Standby NameNode, as the non-interactive mode will not format the image directory, and BootstrapStandby will return an error code. The changes here simply allow BootstrapStandby to download the latest FSImage to the image directory, without needing to format first.