[jira] [Updated] (FLINK-40779) JdbcSourceEnumerator snapshots splitter state ahead of the splits it has handled

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-40779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated FLINK-40779:
-----------------------------------
    Labels: pull-request-available  (was: )

> JdbcSourceEnumerator snapshots splitter state ahead of the splits it has handled
> --------------------------------------------------------------------------------
>
>                 Key: FLINK-40779
>                 URL: https://issues.apache.org/jira/browse/FLINK-40779
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / JDBC
>    Affects Versions: jdbc-4.1.0
>            Reporter: Martijn Visser
>            Priority: Major
>              Labels: pull-request-available
>
> {{JdbcSourceEnumerator}} runs {{SplitterEnumerator#enumerateSplits}} through {{callAsync}}, so the splitter advances its state on the worker thread while the splits only reach {{unassigned}} once the handler runs on the coordinator thread. A checkpoint taken in between stores the new splitter state without those splits, and they are lost on restore. {{SqlTemplateSplitEnumerator}} in continuous mode is affected today.
> {{snapshotState}} should use the splitter state that came back together with the last handled splits, captured inside the callable, instead of calling {{serializableState()}} directly.



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