Zhu Zhu created FLINK-14236: ------------------------------- Summary: Make LazyFromSourcesSchedulingStrategy do lazy scheduling only based on partition state Key: FLINK-14236 URL: https://issues.apache.org/jira/browse/FLINK-14236 Project: Flink Issue Type: Sub-task Components: Runtime / Coordination Affects Versions: 1.10.0 Reporter: Zhu Zhu Fix For: 1.10.0
The philosophy of lazy_from_sources scheduling is to schedule a task when its inputs are ready, i.e. when needed result partitions are consumable. It actually does not directly care whether a task is finished, though a finished task will lead its partitions to be consumable. The {{LazyFromSourcesSchedulingStrategy}} currently does lazy scheduling in two ways: 1. trigger scheduling on FINISHED execution state for blocking partition consumers 2. trigger scheduling on partition consumable events for pipelined partition consumers This makes the scheduling decision a bit messy. And it also requires the {{LazyFromSourcesSchedulingStrategy}} to manage the partition state by itself, to decide when a partition is consumable, which is not good. I'd propose to make {{LazyFromSourcesSchedulingStrategy}} do lazy scheduling only based on partition state. This can make the scheduling decision making clearer and relieve {{LazyFromSourcesSchedulingStrategy}} from partition state management. This work requires FLINK-14234 so that all partition consumable events can be notified. -- This message was sent by Atlassian Jira (v8.3.4#803005)