smiklosovic commented on code in PR #4411:
URL: https://github.com/apache/cassandra/pull/4411#discussion_r2454625820


##########
src/java/org/apache/cassandra/schema/Types.java:
##########
@@ -487,7 +555,20 @@ public Types deserialize(String keyspace, DataInputPlus 
in, Version version) thr
                 List<String> fieldTypes = new ArrayList<>(fieldTypeSize);
                 for (int x = 0; x < fieldTypeSize; x++)
                     fieldTypes.add(in.readUTF());
-                builder.add(name, fieldNames, fieldTypes);
+                String comment = EMPTY_COMMENT;
+                String securityLabel = EMPTY_SECURITY_LABEL;
+                List<String> fieldComments = EMPTY_FIELD_COMMENTS;

Review Comment:
   so, what you did here is that you have replaced this by _static_ class 
variable of `new ArrayList<>()`  type. So upon deserialization you will use 
that static variable and you go with it to `deserializeFieldMetadata`. There 
you add comments to _static variable_. Then upon next deserialisation, you 
would reuse that array again, because it is static? 
   
   You do not want to do this. What you want to do is to break 
`deserializeFieldMetadata` into two methods. Each returning List<String> and 
you return `List.of(EMPTY_COMMENT)` in case there are no comments.



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