[MAPREDUCE-3850] Avoid redundant calls for tokens in TokenCache

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.1, 2.0.0-alpha
• Fix Version/s: 0.23.3, 2.0.2-alpha
• Component/s: security
• Target Version/s: 0.23.3, 2.0.0-alpha
• Assignee: Daryn Sharp
• Reporter: Daryn Sharp
• Created: 10/Feb/12 20:12
• Updated: 10/Mar/15 05:32
• Resolved: 08/May/12 17:28

Description

The TokenCache will repeatedly call the same filesystem for tokens. This is inefficient and can easily be changed to only call each filesystem once.

Issue Links

• is related to: MAPREDUCE-3825 MR should not be getting duplicate tokens for a MR Job.