[ https://issues.apache.org/jira/browse/FLINK-14236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhu Zhu closed FLINK-14236. --------------------------- Resolution: Won't Do Not needed because lazy scheduling will be replaced by pipelined region scheduling FLINK-16430. > Make LazyFromSourcesSchedulingStrategy do lazy scheduling based on partition > state only > --------------------------------------------------------------------------------------- > > 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 > Priority: Major > > 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)