Reading transport protocol metrics fails with "Protocol UDP not found in current stack"

[standalone@localhost:9990 /] /subsystem=jgroups/channel=ee/protocol=UDP:read-attribute(name=timer-queue_max_size
{
    "outcome" => "failed",
    "failure-description" => "WFLYCLJG0019: Protocol UDP not found in current stack",
    "rolled-back" => true
}