[MAPREDUCE-6847] Job history server should release jobs from cache after a fixed duration

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: jobhistoryserver
• Assignee: Weiwei Yang
• Reporter: Weiwei Yang
• Created: 15/Feb/17 10:27
• Updated: 22/Feb/17 02:11
• Resolved: 22/Feb/17 02:10

Description

We found history server is consuming a lot of memory when there are large jobs (with more than 100k of tasks in a single job). Currently JHS cache only evicts entries with size, it's better to add the time expiration as well to reduce heap usage if job has no one accessing for sometime.