[YARN-1785] FairScheduler treats app lookup failures as ERRORs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.4.0
• Target Version/s: 2.4.0
• Hadoop Flags: Reviewed
• Assignee: bc Wong
• Reporter: bc Wong
• Created: 05/Mar/14 01:21
• Updated: 10/Apr/14 13:10
• Resolved: 05/Mar/14 18:24

Description

When invoking the /ws/v1/cluster/apps endpoint, RM will eventually get to RMAppImpl#createAndGetApplicationReport, which calls RMAppAttemptImpl#getApplicationResourceUsageReport, which looks up the app in the scheduler, which may or may not exist. So FairScheduler shouldn't log an error for every lookup failure:

2014-02-17 08:23:21,240 ERROR org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: Request for appInfo of unknown attemptappattempt_1392419715319_0135_000001