[HBASE-27017] MOB snapshot is broken when FileBased SFT is used

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.0, 3.0.0-alpha-2
• Fix Version/s: 2.5.0, 3.0.0-alpha-3
• Component/s: mob
• Assignee: Szabolcs Bukros
• Reporter: Szabolcs Bukros
• Created: 09/May/22 13:33
• Updated: 01/Sep/22 10:57
• Resolved: 05/Jun/22 23:40

Description

During snapshot MOB regions are treated like any other region. When a snapshot is taken and hfile references are collected a StoreFileTracker is created to get the current active hfile list. But the MOB region stores are not tracked so an empty list is returned, resulting in a broken snapshot. When this snapshot is cloned the resulting table will have no MOB files or references.

The problematic code can be found here:

https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotManifest.java#L313

Issue Links

• blocks: HBASE-26969 Eliminate MOB renames when SFT is enabled
• links to: GitHub Pull Request #4466