[jira] [Created] (MAPREDUCE-7106) RM Recovery is delayed much if ATS1/1.5 server is not running.

["Rohith Sharma K S (JIRA)" <ji...@apache.org>]

Rohith Sharma K S created MAPREDUCE-7106:
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             Summary: RM Recovery is delayed much if ATS1/1.5 server is not running. 
                 Key: MAPREDUCE-7106
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7106
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Rohith Sharma K S
            Assignee: Rohith Sharma K S


It is observed that if ATS1/1.5 daemon is not running, RM recovery is delayed as long as timeline client get timed out for each applications. By default, timed out will take around 5 mins. If completed applications are more then amount of time RM will wait is *(number of completed applications in a cluster * 5 minutes)* which is kind of hanged. 

Primary reason for this behavior is YARN-3044 YARN-4129 which refactor existing system metric publisher. This refactoring made appFinished event as synchronous which was asynchronous earlier. 



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