Github user srowen commented on the issue:
https://github.com/apache/spark/pull/14145
I think you're right. `doCheckpoint` gets called with
`clearCheckpointDataLater = false` when it means "do a checkpoint, but, the
batch isn't actually done yet". In those cases, yes you don't mark the batch
complete. When `clearCheckpointDataLater = true` it means "checkpoint, but this
batch is also done, so you can do more cleanup like cleaning old checkpoints".
But yes that means that the batch should be marked completed when
`clearCheckpointDataLater = true` in all cases, and if it's not going to
actually checkpoint then it's done.
CC @tdas
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