[YARN-6561] Update exception message during timeline collector aux service initialization

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.9.0, YARN-5355, 3.0.0-alpha4
• Component/s: timelineserver
• Hadoop Flags: Reviewed
• Assignee: Vrushali C
• Reporter: Vrushali C
• Created: 04/May/17 18:31
• Updated: 24/Apr/18 20:49
• Resolved: 10/May/17 04:44

Description

If the NM is started with timeline service v2 turned off AND aux services setting still containing "timeline_collector", NM will fail to start up since the PerNodeTimelineCollectorsAuxService#serviceInit is invoked and it throws an exception. The exception message is a bit misleading and does not indicate where the actual misconfiguration is.

We should update the exception message so that the right error is conveyed and helps the cluster admin/ops to correct the relevant yarn config settings.