[HDFS-3275] Format command overwrites contents of non-empty shared edits dir if name dirs are empty without any prompting

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha
• Fix Version/s: 2.0.2-alpha
• Component/s: ha, namenode
• Hadoop Flags: Reviewed
• Assignee: amith
• Reporter: Vinithra Varadharajan
• Created: 13/Apr/12 22:48
• Updated: 28/Sep/15 20:58
• Resolved: 01/May/12 05:58

Description

To reproduce:

1. Configure a NameNode with namedirs and a shared edits dir, all of which are empty.
2. Run hdfs namenode -format. Namedirs and shared edits dir gets populated.
3. Delete the contents of the namedirs. Leave the shared edits dir as is. Check the timestamps of the shared edits dir contents.
4. Run format again. The namedirs as well as the shared edits dir get formatted. The shared edits dir's contents have been replaced without any prompting.