[HDFS-15119] Allow expiration of cached locations in DFSInputStream

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.3.0, 3.1.4, 3.2.2
• Component/s: dfsclient
• Hadoop Flags: Reviewed
• Assignee: Ahmed Hussein
• Reporter: Ahmed Hussein
• Created: 13/Jan/20 20:54
• Updated: 28/Sep/21 16:15
• Resolved: 24/Jan/20 15:55

Description

Staleness and other transient conditions can affect reads for a long time since the block locations may not be re-fetched. It makes sense to make cached locations to expire.
For example, we may not take advantage of local-reads since the nodes are blacklisted and have not been updated.