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https://issues.apache.org/jira/browse/FLINK-30656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17676543#comment-17676543
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Leonard Xu commented on FLINK-30656:
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Thanks [~masteryhx]for opening this ticket, +1 to add key logs for schema
compatibility check.
> Provide more logs for schema compatibility check
> ------------------------------------------------
>
> Key: FLINK-30656
> URL: https://issues.apache.org/jira/browse/FLINK-30656
> Project: Flink
> Issue Type: Improvement
> Components: API / Type Serialization System
> Reporter: Hangxiang Yu
> Assignee: Hangxiang Yu
> Priority: Major
>
> Currently, we have very few logs and exception info when checking schema
> compatibility.
> It's difficult to see why the compatibility is not compatible, especially for
> some complicated nested serializers.
> For example, for map serializer, when it's not compatible, we may only see
> below without other information:
> {code:java}
> Caused by: org.apache.flink.util.StateMigrationException: The new state
> serializer
> (org.apache.flink.api.common.typeutils.base.MapSerializer@e95e076a) must not
> be incompatible with the old state serializer
> (org.apache.flink.api.common.typeutils.base.MapSerializer@c33b100f). {code}
> So I think we could add more infos when checking the compatibility.
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