Vlad Rozov created YARN-7000:

             Summary: NMClient and NMClientAsync API is not compatible with 
work-preserving AM restart
                 Key: YARN-7000
                 URL: https://issues.apache.org/jira/browse/YARN-7000
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Vlad Rozov

NMClient and NMClientAsync assume start()/stop() sequence. In case AM is 
restarted with {{KeepContainersAcrossApplicationAttempts}} set to {{true}}, 
that assumption is wrong as some containers may be started by a previous app 

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