Zhu Zhu created FLINK-20721:
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Summary: Remove unknown input channels and process to update
partitions
Key: FLINK-20721
URL: https://issues.apache.org/jira/browse/FLINK-20721
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination, Runtime / Network
Affects Versions: 1.13.0
Reporter: Zhu Zhu
Fix For: 1.13.0
With the latest pipelined region scheduling, Flink no longer launch a task
before knowing the locations of all the partitions it consumes.
`scheduleOrUpdateConsumers` is no longer needed so we removed it in FLINK-20439.
Unknown input channels and the process to update it is also no longer needed.
I'd propose to remove them and the benefits are:
1. simplifying the code of both scheduler and shuffle components
2. simplifying interfaces of ShuffleEnvironment and ShuffleDescriptor
3. ensure the assumptions in InputGate#resumeConsumption() implementations
4. allow to remove ScheduleMode#allowLazyDeployment() and later completely
remove ScheduleMode
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