fapifta commented on PR #6919:
URL: https://github.com/apache/ozone/pull/6919#issuecomment-2224248023

   Two additional thoughts for a proper fix:
   - we need to change the check in the KeyValueHandler and introduce a 
RequestFeatureValidator annotated method for that with the proper version 
check, the method should do the BlockUtils.verifyReplicaIdx() call, and error 
out from there in case the ClientVersion is at least 
EC_REPLICA_INDEX_REQUIRED_IN_BLOCK_REQUEST instead of having the check within 
the request processing logic
   - If we choose to implement the second suggestion of mine, and include the 
version in the mapping inside ValidatorRegistry, that means we need to add a 
4th parameter to the annotation with the client's version, and also we need to 
think about the associated annotation preprocessor and figure out if we need 
verification for the version defined in the annotation.
   On the other hand, thinking further about this option, we need to consider 
how it will affect further developments of the framework, if we add the version 
to the annotation , as we also had plans to introduce this framework to 
internal protocol calls where the version may not be a ClientVersion, but it 
can also be a DatanodeVersion, a StorageContainerManagerVersion (which we did 
not define yet) or an OzoneManagerVersion. So this makes me think that it would 
be better to have the client's version be checked within the annotated 
validator methods and not within the framework itself, but still I am open to 
explore this idea further.


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