[HADOOP-10587] Use a thread-local cache in TokenIdentifier#getBytes to avoid creating many DataOutputBuffer objects

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 2.4.0
• Target Version/s: 2.5.0
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 08/May/14 20:33
• Updated: 22/May/14 18:48
• Resolved: 22/May/14 18:48

Description

We can use a thread-local cache in TokenIdentifier#getBytes to avoid creating many DataOutputBuffer objects. This will reduce our memory usage (for example, when loading edit logs), and help prevent OOMs.