[HDFS-12420] Add an option to disallow 'namenode format -force'

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.9.0, 2.8.3, 2.7.5, 3.0.0, 3.1.0
• Hadoop Flags: Reviewed
• Assignee: Ajay Kumar
• Reporter: Ajay Kumar
• Created: 11/Sep/17 18:41
• Updated: 19/Oct/17 00:38
• Resolved: 05/Oct/17 22:29

Description

Support for disabling NameNode format to avoid accidental formatting of Namenode in production cluster. If someone really wants to delete the complete fsImage, they can first delete the metadata dir and then run

 hdfs namenode -format

manually.