[MAPREDUCE-786] Jobtracker history should be written aysnchronously to the filesystem

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Incomplete
• Component/s: jobtracker
• Assignee: Sharad Agarwal
• Reporter: Sharad Agarwal
• Created: 22/Jul/09 09:25
• Updated: 23/Jul/14 20:04
• Resolved: 23/Jul/14 20:04

Description

Jobtracker lock is held while writing the history events. This makes the jobtracker slow on flushes, especially when history is written to HDFS. History events should be written asynchronously to avoid this problem.