Github user tillrohrmann commented on the issue:
https://github.com/apache/flink/pull/2256
In general, I think it would be helpful for users to be able to retrieve
checkpoints of a failed job. I could imagine a scenario where a job is faulty
but one only runs into after some time. Being then able to transform a
checkpoint into a savepoint and then restarting the failed job with a corrected
jar could be helpful.
Thus, I think we should only remove the persisted job data if the job has
reached FINISHED or CANCELED. Admittedly, this is a very conservative approach,
but then users are less likely to lose data.
However, this should be out of the scope of this PR.
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