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https://issues.apache.org/jira/browse/FLINK-24439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17489279#comment-17489279
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Jiangjie Qin commented on FLINK-24439:
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[~pnowojski] This effectively introduces a cross-operator communication
mechanism for control purpose. Can you articulate a bit on the intended usage
of this {{{}CoordinatorStore{}}}? Will it be used as an ordinary shared
hashmap? If so, will there be any convention of the keys to avoid conflicts
between different operators?
> Introduce CoordinatorStore
> --------------------------
>
> Key: FLINK-24439
> URL: https://issues.apache.org/jira/browse/FLINK-24439
> Project: Flink
> Issue Type: Sub-task
> Components: Connectors / Common
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.15.0
>
>
> In order to allow {{SourceCoordinators}}s from different {{Sources}} (for
> example two different Kafka sources, or Kafka and Kinesis) to align
> watermarks, they have to be able to exchange information/aggregate watermarks
> from those different Sources. To enable this, we need to provide some
> {{CoordinatorStore}} concept, that would be a thread safe singleton.
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