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https://issues.apache.org/jira/browse/FLINK-2329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen resolved FLINK-2329.
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Resolution: Implemented
Implemented in 2ccb5fdb47aa0e3766fd7fbd17a41feaca29fcbc
> Refactor RPCs from within the ExecutionGraph
> --------------------------------------------
>
> Key: FLINK-2329
> URL: https://issues.apache.org/jira/browse/FLINK-2329
> Project: Flink
> Issue Type: Sub-task
> Components: JobManager, TaskManager
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Fix For: 0.10
>
>
> Currently, we store an {{ActorRef}} of the TaskManager into an {{Instance}}
> object. This {{ActorRef}} is used from within {{Executions}} to interact with
> the {{TaskManager}}. This is not a nice abstraction since it does not hide
> implementation details.
> Since we need to add a leader session ID to messages sent by the
> {{Executions}} in order to support high availability, we would need to make
> the leader session ID available to the {{Execution}}. A better solution seems
> to be to replace the direct {{ActorRef}} interaction with an instance gateway
> abstraction which encapsulates the communication logic. Having such an
> abstraction, it will be easy to decorate messages transparently with a leader
> session ID. Therefore, I propose to refactor the current {{Instance}}
> communication and to introduce an {{InstanceGateway}} abstraction.
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