[jira] [Created] (FLINK-5007) Retain externalized checkpoint on suspension

[Shang Yuanchun (Jira)]

Ufuk Celebi created FLINK-5007:
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             Summary: Retain externalized checkpoint on suspension
                 Key: FLINK-5007
                 URL: https://issues.apache.org/jira/browse/FLINK-5007
             Project: Flink
          Issue Type: Bug
          Components: State Backends, Checkpointing
            Reporter: Ufuk Celebi
            Assignee: Ufuk Celebi
             Fix For: 1.2.0


Externalized checkpoints are cleaned up when the job is suspended. Suspensions happen on graceful shut down (non-HA) or loss of leadership (HA).

In case of HA, the checkpoint store does not clean up any checkpoints as they might be recovered by a new leader. The only way to stop a HA job is to actually cancel it. Therefore the configured clean up behaviour doesn't matter.

In case of non-HA, suspensions happen because of graceful shut down (for example stopping a YARN session). In this case I would treat the clean up behaviour similar to cancelling the job.

{code}
ExternalizedCheckpointCleanup.DELETE_ON_CANCELLATION => delete on suspension

ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION => retain on suspension
{code}




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