[IMPALA-1586] Impala should randomly select cached replica

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.1
• Assignee: Martin Grund
• Reporter: Martin Grund
• Created: 09/Dec/14 22:07
• Updated: 13/Dec/14 00:36
• Resolved: 13/Dec/14 00:36

Description

When the cache replication factor is increased for individual directories, Impala currently always selects the first replica. Instead, Impala should select a random replica with a local backend to avoid hotspots.