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Posted to issues@flink.apache.org by "zhijiang (JIRA)" <ji...@apache.org> on 2019/02/28 06:43:00 UTC

[jira] [Created] (FLINK-11776) Refactor to simplify the process of scheduleOrUpdateConsumers

zhijiang created FLINK-11776:
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             Summary: Refactor to simplify the process of scheduleOrUpdateConsumers
                 Key: FLINK-11776
                 URL: https://issues.apache.org/jira/browse/FLINK-11776
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Coordination
            Reporter: zhijiang
            Assignee: zhijiang


Based on the work of [FLINK-11417|https://issues.apache.org/jira/browse/FLINK-11417], the process of {{Execution#scheduleOrUpdateConsumers}} do not need to consider the race condition with schedule process, so we can refactor to make it easy to handle.
 * The concurrent data structure for cacheing partial input channel descriptor can be replaced by common list.
 * If the consumer is in {{CREATED}} state, we only need to schedule it and the partition info would be known during deployment.
 * If the consumer is in {{SCHEDULED}} state, we need do nothing.
 * If the consumer is in {{RUNNING}} state, we can send partition info immediately.
 * If the consumer is in {{DEPLOYING}} state, we can cache the partition info in order to send them in batch after consumer switching to {{RUNNING}} state.
 * {{PartialInputChannelDeploymentDescriptor}} is not needed any more, we can cache partition info directly.

This refactoring is also a preparation work for future introducing {{ShuffleMaster}} in [FLINK-11391|https://issues.apache.org/jira/browse/FLINK-11391].



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