[jira] [Created] (FLINK-4272) Create a JobClient for job control and monitoring

[Shang Yuanchun (Jira)]

Maximilian Michels created FLINK-4272:
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             Summary: Create a JobClient for job control and monitoring
                 Key: FLINK-4272
                 URL: https://issues.apache.org/jira/browse/FLINK-4272
             Project: Flink
          Issue Type: New Feature
          Components: Client
            Reporter: Maximilian Michels
            Assignee: Maximilian Michels
             Fix For: 1.2.0


The aim of this new features is to expose a client to the user which allows to cancel a running job, retrieve accumulators for a running job, or perform other actions in the future. Let's call it {{JobClient}} for now (although this clashes with the existing JobClient class which could be renamed to JobClientActorUtils instead).

The new client should be returned from the {{ClusterClient}} class upon job submission. The client should also be instantiatable by the users to retrieve the JobClient with a JobID.

We should expose the new JobClient to the Java and Scala APIs using a new method on the {{ExecutionEnvironment}} / {{StreamExecutionEnvironment}} called {{executeWithControl()}} (perhaps we can find a better name).





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