@Override
public LocatedBlock append(String src, String clientName)
throws AccessControlException, DSQuotaExceededException,
FileNotFoundException, SafeModeException, UnresolvedLinkException,
IOException {
AppendRequestProto req = AppendRequestProto.newBuilder()
.setSrc(src)
.setClientName(clientName)
.build();
try {
AppendResponseProto res = rpcProxy.append(null, req);