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https://issues.apache.org/jira/browse/FLINK-10855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17323436#comment-17323436
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Flink Jira Bot commented on FLINK-10855:
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This issue is assigned but has not received an update in 7 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> CheckpointCoordinator does not delete checkpoint directory of late/failed
> checkpoints
> -------------------------------------------------------------------------------------
>
> Key: FLINK-10855
> URL: https://issues.apache.org/jira/browse/FLINK-10855
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.5.5, 1.6.2, 1.7.0
> Reporter: Till Rohrmann
> Assignee: vinoyang
> Priority: Major
> Labels: stale-assigned
>
> In case that an acknowledge checkpoint message is late or a checkpoint cannot
> be acknowledged, we discard the subtask state in the
> {{CheckpointCoordinator}}. What's not happening in this case is that we
> delete the parent directory of the checkpoint. This only happens when we
> dispose a {{PendingCheckpoint#dispose}}.
> Due to this behaviour it can happen that a checkpoint fails (e.g. a task not
> being ready) and we delete the checkpoint directory. Next another task writes
> its checkpoint data to the checkpoint directory (thereby creating it again)
> and sending an acknowledge message back to the {{CheckpointCoordinator}}. The
> {{CheckpointCoordinator}} will realize that there is no longer a
> {{PendingCheckpoint}} and will discard the sub task state. This will remove
> the state files from the checkpoint directory but will leave the checkpoint
> directory untouched.
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