Remove flush calls from JobHistory
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Key: HADOOP-3080
URL: https://issues.apache.org/jira/browse/HADOOP-3080
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Affects Versions: 0.17.0
Reporter: Devaraj Das
Assignee: Amareshwari Sriramadasu
Priority: Critical
Fix For: 0.17.0
The flush calls from JobHistory should be removed. This has performance impact
when lots of events are being logged to the history files since the JT lock
(e.g. lostTracker where the tracker had ran a lot of tasks, and we call
failedTask in a loop, etc.)
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