[YARN-6208] Improve the log when FinishAppEvent sent to the NodeManager which didn't run the application

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.9.0, 3.0.0-alpha4
• Labels: newbie supportability
• Target Version/s: 2.9.0, 3.0.0-alpha4
• Hadoop Flags: Reviewed
• Assignee: Akira Ajisaka
• Reporter: Akira Ajisaka
• Created: 17/Feb/17 07:02
• Updated: 24/Apr/18 20:52
• Resolved: 02/Jun/17 15:53

Description

When FinishAppEvent of an application is sent to a NodeManager and there are no applications of the application ran on the NodeManager, we can see the following log:

2015-12-28 11:59:18,725 WARN org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl: Event EventType: FINISH_APPLICATION sent to absent application application_1446103803043_9892

YARN-4520 made the log as follows:

          LOG.warn("couldn't find application " + appID + " while processing"
              + " FINISH_APPS event");

and I'm thinking it can be improved.

• Make the log WARN from INFO
• Add why the NodeManager couldn't find the application. For example, "because there were no containers of the application ran on the NodeManager."

Issue Links

• is related to: YARN-4520 FinishAppEvent is leaked in leveldb if no app's container running on this node