umeshdangat commented on code in PR #3434:
URL: https://github.com/apache/flink-cdc/pull/3434#discussion_r1861307255
##########
flink-cdc-runtime/src/main/java/org/apache/flink/cdc/runtime/serializer/schema/DataFieldSerializer.java:
##########
@@ -39,7 +39,14 @@ public class DataFieldSerializer extends
TypeSerializerSingleton<DataField> {
public static final DataFieldSerializer INSTANCE = new
DataFieldSerializer();
private final StringSerializer stringSerializer =
StringSerializer.INSTANCE;
- private final DataTypeSerializer dataTypeSerializer = new
DataTypeSerializer();
+ private DataTypeSerializer dataTypeSerializer;
+
+ private DataTypeSerializer getDataTypeSerializer() {
Review Comment:
> I came across a bug due to circular dependency between
DataFieldSerializer, DataTypeSerializer, and RowTypeSerializer classes that
causes NPE for certain RowTypes like nested row type. I have baked that change
in this PR but also have a separate one
https://github.com/apache/flink-cdc/pull/3400
[explained earlier
here](https://github.com/apache/flink-cdc/pull/3434#issuecomment-2192072774)
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