[HDFS-8646] Prune cached replicas from DatanodeDescriptor state on replica invalidation

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: caching
• Target Version/s: 2.8.0
• Assignee: Andrew Wang
• Reporter: Andrew Wang
• Created: 23/Jun/15 02:07
• Updated: 30/Aug/16 01:32
• Resolved: 24/Jun/15 21:46

Description

Currently we remove blocks from the DD's CachedBlockLists on node failure and on cache report, but not on replica invalidation. This can lead to an invalid situation where we return a LocatedBlock with cached locations that are not backed by an on-disk replica.