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https://issues.apache.org/jira/browse/FLINK-22136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arvid Heise resolved FLINK-22136.
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Fix Version/s: 1.14.0
Resolution: Fixed
> Device application for unaligned checkpoint test on cluster
> -----------------------------------------------------------
>
> Key: FLINK-22136
> URL: https://issues.apache.org/jira/browse/FLINK-22136
> Project: Flink
> Issue Type: Sub-task
> Reporter: Arvid Heise
> Assignee: Anton Kalashnikov
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.14.0
>
>
> To test unaligned checkpoints, we should use a few different applications
> that use different features:
> * Mixing forward/rescale channels with keyby or other shuffle operations
> * Unions
> * 2 or n-ary operators
> * Associated state ((keyed) process function)
> * Correctness verifications
> The sinks should not be mocked but rather should be able to induce a fair
> amount of backpressure into the system. Quite possibly, it would be a good
> idea to have a way to add more backpressure to the sink by running the
> respective system on the cluster and be able to add/remove parallel instances.
> Things to check in the application
> * Inflight data is restored to the correct keygroups -> can be checked with
> keyed state in a process function
> * Correctness: Completeness (no lost records) + no duplicates
> * Orderness of data for keyed exchanges (we guarantee that records with the
> same key retain orderness across keyed operators)
> * (To detect errors early, we can also use magic headers)
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