The 'gluster volume set' command has a check intended to prevent newer options from being set on a volume when older clients are connected. However, this check was not implemented correctly, and instead prevented any option from being set when old clients were connected. Attempts to set a volume option resulted in the following error message:
"volume set: failed: One or more connected clients cannot support the feature being set. These clients need to be upgraded or disconnected before running this command"
This check has been corrected so that it only fails when new options are being set on a volume with connections to old clients.