Karthik Kambatla created YARN-3643:
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             Summary: Provide a way to store only running applications in the 
state store
                 Key: YARN-3643
                 URL: https://issues.apache.org/jira/browse/YARN-3643
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager
    Affects Versions: 2.7.0
            Reporter: Karthik Kambatla


Today, we have a config that determines the number of applications that can be 
stored in the state-store. Since there is no easy way to figure out the maximum 
number of running applications at any point in time, users are forced to use a 
conservative estimate. Our default ends up being even more conservative.

It would be nice to allow storing all running applications with a conservative 
upper bound for it. This should allow for shorter recovery times in most 
deployments. 



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