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https://issues.apache.org/jira/browse/FLINK-12574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16846741#comment-16846741
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yitzchak lieberman commented on FLINK-12574:
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its not related to restore from checkpoint as the files get their names from
sub task id and part counter, like: part-<sub task id>-<part counter>
so if the application cancelled and starts again from some checkpoint the files
will be overwritten.
> using sink StreamingFileSink files are overwritten when resuming application
> causing data loss
> ----------------------------------------------------------------------------------------------
>
> Key: FLINK-12574
> URL: https://issues.apache.org/jira/browse/FLINK-12574
> Project: Flink
> Issue Type: Bug
> Components: Connectors / FileSystem
> Affects Versions: 1.8.0
> Reporter: yitzchak lieberman
> Priority: Critical
>
> when part files are saved to s3 bucket (with bucket assigner) with simple
> names such as:
> part-0-0 and part-1-2
> restarting or resuming application causes checkpoint id to start from 0 and
> old files will be replaced by new part files.
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