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https://issues.apache.org/jira/browse/FLINK-19199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tzu-Li (Gordon) Tai closed FLINK-19199.
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Fix Version/s: statefun-2.2.0
Resolution: Fixed
statefun-master: 7d3b2af409ba71ef8f034c21e9d7f9f820f3f3cb
> Add execution attempt ID to feedback channel keys
> -------------------------------------------------
>
> Key: FLINK-19199
> URL: https://issues.apache.org/jira/browse/FLINK-19199
> Project: Flink
> Issue Type: Task
> Components: Stateful Functions
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Tzu-Li (Gordon) Tai
> Priority: Major
> Labels: pull-request-available
> Fix For: statefun-2.2.0
>
>
> The feedback brokers identify a single pair of producer / consumer with a
> {{SubtaskFeedbackKey}}, which is uniquely identified within a job by only the
> subtask index.
> This can potentially become an issue in job restart scenarios, since the
> feedback brokers are static fields, and are durable across non-TM failure job
> restarts.
> Currently it is not a problem because we do clear broker channels on close,
> but adding an extra execution attempt ID into the {{SubtaskFeedbackKey}} can
> make things safer.
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