Zhu Zhu created FLINK-18034:
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Summary: Introduce PreferredLocationsRetriever
Key: FLINK-18034
URL: https://issues.apache.org/jira/browse/FLINK-18034
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination
Reporter: Zhu Zhu
Assignee: Zhu Zhu
Fix For: 1.12.0
Preferred locations based on state and inputs are scattered into multiple
components, which makes it harder to reasoning the calculation and complicates
those hosting components.
We can introduce a {{PreferredLocationsRetriever}} to be used by
{{ExecutionSlotAllocator}} which returns preferred locations of an execution
vertex and hides the details of the calculation from other components.
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