[GitHub] [pulsar] vroyer commented on a change in pull request #10428: [Issue #10427] Add AvroSchema UUID support fix

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vroyer commented on a change in pull request #10428:
URL: https://github.com/apache/pulsar/pull/10428#discussion_r635353156



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File path: pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/util/SchemaUtil.java
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@@ -88,8 +90,10 @@ public static Schema extractAvroSchema(SchemaDefinition schemaDefinition, Class
         try {
             return parseAvroSchema(pojo.getDeclaredField("SCHEMA$").get(null).toString());
         } catch (NoSuchFieldException | IllegalAccessException | IllegalArgumentException ignored) {
-            return schemaDefinition.getAlwaysAllowNull() ? ReflectData.AllowNull.get().getSchema(pojo)
-                    : ReflectData.get().getSchema(pojo);
+            ReflectData reflectData = schemaDefinition.getAlwaysAllowNull() ? ReflectData.AllowNull.get()
+                    : ReflectData.get();
+            AvroSchema.addLogicalTypeConversions(reflectData, schemaDefinition.isJsr310ConversionEnabled());

Review comment:
       Because there is in fact 2 singleton instances in the AVRO ReflectData class: the ReflectData.INSTANCE and the ReflectData.AllowNull.INSTANCE. So when your schema allows nulls, you need to register logical types conversion in the ReflectData.AllowNull.INSTANCE. That is already done like that in https://github.com/apache/pulsar/blob/master/pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/StructSchema.java#L96




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