Dawid Wysakowicz created FLINK-36339:
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Summary: Remove java serialization from SQL serializers
Key: FLINK-36339
URL: https://issues.apache.org/jira/browse/FLINK-36339
Project: Flink
Issue Type: Improvement
Reporter: Dawid Wysakowicz
Fix For: 2.0.0
Some of the serializers used in SQL use java serialization in their snapshots
which introduces risks of state incompatibilities that are hard to fix. We've
seen that already with FLINK-36318
We should get rid off that. For serializing {{LogicalType}} I'd suggest using
{{LogicalType#asSerializableString}}.
For {{ArrayDataSerializerSnapshot}} and {{MapDataSerializerSnapshot}} we should
properly implement {{CompositeTypeSerializerSnapshot}} interface instead of
serializing nested {{TypeSerializers}}.
Few of the affected classes:
*
https://github.com/apache/flink/blob/1ba890062d94edc4d9ea5431d44adaeb123d9607/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/typeutils/MapDataSerializer.java#L283
*
https://github.com/apache/flink/blob/1ba890062d94edc4d9ea5431d44adaeb123d9607/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/typeutils/ArrayDataSerializer.java#L302
*
https://github.com/apache/flink/blob/1ba890062d94edc4d9ea5431d44adaeb123d9607/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/typeutils/RowDataSerializer.java#L304
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