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https://issues.apache.org/jira/browse/FLINK-40631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Nuyanzin reassigned FLINK-40631:
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Assignee: Sergey Nuyanzin
> table-planner: CalcRestoreTest calc-variant restore fails after Variant type
> evolution (serialVersionUID)
> ---------------------------------------------------------------------------------------------------------
>
> Key: FLINK-40631
> URL: https://issues.apache.org/jira/browse/FLINK-40631
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Reporter: Purushottam Sinha
> Assignee: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.4.0
>
>
> h3. Problem
> {{CalcRestoreTest.testRestore[10]}} (the {{calc-variant}} program) errors on
> master, reddening the {{table}} module CI. The checked-in restore savepoint
> no longer deserializes because the {{Variant}} type's {{serialVersionUID}}
> shifted as the type gained new accessor methods.
> h3. Evidence
> * Failure at master {{dd33da5a2da}} (CI run 34506517282):
> {noformat}
> java.io.InvalidClassException: org.apache.flink.types.variant.Variant; local
> class incompatible: stream classdesc serialVersionUID = -1858271569023660977,
> local class serialVersionUID = -3681789473927144047
> {noformat}
> * {{org.apache.flink.types.variant.Variant}} is a {{Serializable}} interface
> with no explicit {{serialVersionUID}}, so its auto-computed UID changes
> whenever its declared method set changes.
> * The {{calc-variant}} savepoint (last regenerated 2026-09-09) predates the
> most recent {{Variant}} extension (FLINK-40515, 2026-09-10), so its
> serialized UID no longer matches the current class.
> h3. Proposed fix
> * Regenerate the {{calc-variant}} restore savepoint under
> {{flink-table/flink-table-planner/src/test/resources/restore-tests/stream-exec-calc_1/calc-variant/}}
> against the current {{Variant}}.
> * Optionally, evaluate a stable {{serialVersionUID}} or compatibility path so
> {{Variant}} can evolve without invalidating existing state.
> h3. Acceptance
> * {{CalcRestoreTest}} passes on master; the {{table}} module CI is green.
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