Github user uce commented on the issue:
https://github.com/apache/flink/pull/2750
@StephanEwen Do you have time to look at this? Currently, when externalized
checkpoints are configured and the cluster shuts down via suspending all jobs,
the externalized checkpoints are cleaned up. This PR proposes to handle
suspension like a cancellation and respect the corresponding cleanup
configuration, e.g. retain if `RETAIN_ON_CANCELLATION` and delete if
`DELETE_ON_CANCELLATION`.
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