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https://issues.apache.org/jira/browse/FLINK-17520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther updated FLINK-17520:
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Priority: Critical (was: Major)
> Extend CompositeTypeSerializerSnapshot to allow composite serializers to
> signal migration based on outer configuration
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-17520
> URL: https://issues.apache.org/jira/browse/FLINK-17520
> Project: Flink
> Issue Type: Improvement
> Components: API / Type Serialization System
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Tzu-Li (Gordon) Tai
> Priority: Critical
>
> Compatibility of composite serializers is governed by the overall resolved
> compatibility of all its nested serializers, as well as any additional
> configuration (or what we call the "outer configuration" or "outer snapshot").
> The compatibility resolution logic for these composite serializers is
> implemented in the {{CompositeTypeSerializerSnapshot}} abstract class.
> One current limitation of this base class is that the implementation assumes
> that the outer configuration is always either compatible, or incompatible.
> We should relax this to also allow signaling migration, purely based on the
> outer configuration. This is already a requirement by FLINK-16998.
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