Till Rohrmann created FLINK-10498:
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             Summary: Decouple ExecutionGraph from JobMaster
                 Key: FLINK-10498
                 URL: https://issues.apache.org/jira/browse/FLINK-10498
             Project: Flink
          Issue Type: Sub-task
          Components: Distributed Coordination
    Affects Versions: 1.7.0
            Reporter: Till Rohrmann
             Fix For: 1.7.0


With declarative resource management we want to react to the set of available 
resources. Thus, we need a component which is responsible for scaling the 
{{ExecutionGraph}} accordingly. In order to better do this and separate 
concerns, it is beneficial to introduce a {{Scheduler/ExecutionGraphDriver}} 
component which is in charge of the {{ExecutionGraph}}. This component owns the 
{{ExecutionGraph}} and is allowed to modify it. In the first version, this 
component will simply accommodate all the existing logic of the {{JobMaster}} 
and the respective {{JobMaster}} methods are forwarded to this component. 

This new component should not change the existing behaviour of Flink.

Later this component will be in charge of announcing the required resources, 
deciding when to rescale and executing the rescaling operation.




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