Matthias Pohl created FLINK-26741:
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             Summary: CheckpointIDCounter.shutdown should expose errors 
asynchronously
                 Key: FLINK-26741
                 URL: https://issues.apache.org/jira/browse/FLINK-26741
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Coordination
            Reporter: Matthias Pohl


{{CheckpointIDCounter.shutdown}} should return a {{CompletableFuture}} exposing 
errors if anything happens to enable retrying of the cleanup.

All implementations should also work in an idempotent fashion, i.e. nothing 
should happen if the artifact was already deleted.

This bug is not considered a 1.15 blocker because unit tests rerunning the 
shutdown worked properly already, i.e. in the worst case (of an error) we would 
just miss to clean up right now.



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