[HDFS-16055] Quota is not preserved in snapshot INode

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.4.0, 3.2.3, 3.3.2
• Component/s: hdfs
• Labels: pull-request-available
• Assignee: Siyao Meng
• Reporter: Siyao Meng
• Created: 04/Jun/21 22:18
• Updated: 09/Nov/21 19:17
• Resolved: 14/Jun/21 17:49

Description

Quota feature is not preserved during snapshot creation, this causes INodeDirectory#metadataEquals to ALWAYS return true. Therefore, snapshotDiff will ALWAYS return the snapshot root as modified, even if the quota is set before the snapshot creation:

$ hdfs snapshotDiff /diffTest s0 .
Difference between snapshot s0 and current directory under directory /diffTest:
M	.

Issue Links

• relates to: HDFS-16187 SnapshotDiff behaviour with Xattrs and Acls is not consistent across NN restarts with checkpointing
• links to: GitHub Pull Request #3078