Github user uce commented on the issue:
https://github.com/apache/flink/pull/2750
In HA mode, checkpoints are not deleted on suspension. This PR won't change
that behaviour. It only affects non-HA behaviour.
Currently, the behaviour is to remove checkpoints on suspension, which is
definitely a problem. But in non-HA mode suspension happens also for graceful
shut down (for example when terminating a YARN session). Never deleting on
suspend means that users who have `DELETE_ON_CANCELLATION` configured, will
have externalized checkpoints lingering around when they shut down their non-HA
cluster. That's why I thought it might be better to treat this the same as the
retain/delete on cancellation configuration.
Does this make sense? For HA, these setting do not apply during suspension.
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