ryerraguntla commented on code in PR #4401:
URL: https://github.com/apache/iggy/pull/4401#discussion_r4202054879


##########
gateways/kafka/src/group/state.rs:
##########
@@ -708,6 +821,32 @@ fn join_request_error(config: &GroupCoordinatorConfig, 
request: &JoinRequest) ->
     None
 }
 
+/// `protocol_type`, a client-supplied `member_id`, `group_instance_id`, and 
each protocol
+/// `name` are echoed as legacy strings - the last of these by 
`DescribeGroups` v0-v4, which
+/// writes the stored group's selected protocol name as `protocol_data` with 
an i16 length, not
+/// by `JoinGroup` itself. When the member id is generated, the instance id is 
the prefix and the
+/// `-{uuid}` suffix has to fit in the same cap.
+fn legacy_strings_too_long(request: &JoinRequest) -> bool {
+    if request.protocol_type.len() > MAX_LEGACY_STRING_BYTES

Review Comment:
   Fixed



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