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https://issues.apache.org/jira/browse/BEAM-2393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065750#comment-16065750
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Jingsong Lee commented on BEAM-2393:
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Now the {{UnboundedSourceWrapper}} has already supported the exit when the
watermark exceeds TIMESTAMP_MAX_VALUE.
So can we use {{BoundedToUnboundedSourceAdapter}}?
bq. Checkpoints are created by calling {{BoundedReader#splitAtFraction}} on
inner {{BoundedSource}}.
bq. Sources that cannot be split are read entirely into memory, so this
transform does not work well with large, unsplittable sources.
But at least we can provide an accurate semantics.
> BoundedSource is not fault-tolerant in FlinkRunner Streaming mode
> -----------------------------------------------------------------
>
> Key: BEAM-2393
> URL: https://issues.apache.org/jira/browse/BEAM-2393
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Jingsong Lee
>
> {{BoundedSourceWrapper}} does not implement snapshot() and restore(), when
> the failure to restart, it will send duplicate data.
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