[MAPREDUCE-6929] TimelineV2Client hangs MR AM

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Component/s: mr-am
• Target Version/s: 3.0.0-beta1
• Assignee: Unassigned
• Reporter: Haibo Chen
• Created: 02/Aug/17 20:55
• Updated: 03/Aug/17 20:36
• Resolved: 03/Aug/17 20:36

Description

I happened to misconfigure ATSv2 settings, that is, I enabled emitting to ATSv2 in MR and did not start YARN with ATSv2. The job was stuck after it finished all its work.

Noticed that in MRAppMaster, TimelineClient is never added as a service, which I think is why the AM was hanging.