[HBASE-18398] Snapshot operation fails with FileNotFoundException

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0, 1.3.2, 2.0.0-alpha-2, 2.0.0
• Component/s: snapshots
• Assignee: Ashu Pachauri
• Reporter: Ashu Pachauri
• Created: 17/Jul/17 21:36
• Updated: 21/Mar/18 22:08
• Resolved: 10/Aug/17 22:09

Description

Failing to take snapshot due to FileNotFoundException

• FlushSnapshotSubprocedure.RegionSnapshotTask takes a region level read lock
• Call to HRegion#addRegionToSnapshot.
• Call to SnapshotManifest#addRegion. This gets the current list of store files.
• RACE → File is marked as compacted away and HFileArchiver moves the file to archive under store level lock.
• SnapshotManifest#addRegion visits the stale list of store files one by one. It does a file.getStatus() call to get length of each file. Since the file object still points to the original file, file.getStatus() fails with FileNotFoundException.

Issue Links

• relates to: HBASE-18399 Files in a snapshot can go missing even after the snapshot is taken successfully