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https://issues.apache.org/jira/browse/FLINK-26960?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gaël Renoux updated FLINK-26960:
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Attachment: stack-trace.log
> Make it possible to drop an old unused registered Kryo serializer
> -----------------------------------------------------------------
>
> Key: FLINK-26960
> URL: https://issues.apache.org/jira/browse/FLINK-26960
> Project: Flink
> Issue Type: Bug
> Components: API / Type Serialization System
> Affects Versions: 1.15.0, 1.12.7, 1.13.6, 1.14.4
> Reporter: Dawid Wysakowicz
> Priority: Critical
> Attachments: stack-trace.log
>
>
> If users register a Kryo serializer e.g. via:
> {code}
> env.registerTypeWithKryoSerializer(ClassA. ClassASerializer.class);
> {code}
> and then use a Kryo serializer for serializing state objects, the registered
> serializer is written into the KryoSerializer snapshot. Even if Kryo is used
> for serializing classes other than ClassA. This makes it impossible to remove
> {{ClassASerializer}} from the classpath, because it is required for reading
> the savepoint.
> This problem has been reported by users before e.g.
> https://lists.apache.org/thread/989mfrxqznvzpmhm0315kv23bxh1ln8y
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