[YARN-3094] reset timer for liveness monitors after RM recovery

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.7.0, 2.6.1, 3.0.0-alpha1
• Component/s: resourcemanager
• Labels: 2.6.1-candidate
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Jun Gong
• Reporter: Jun Gong
• Created: 23/Jan/15 10:51
• Updated: 30/Aug/16 01:28
• Resolved: 09/Feb/15 21:48

Description

When RM restarts, it will recover RMAppAttempts and registry them to AMLivenessMonitor if they are not in final state. AM will time out in RM if the recover process takes long time due to some reasons(e.g. too many apps).

In our system, we found the recover process took about 3 mins, and all AM time out.