rrdtool dump not works with rrdcached

[landy2005]

Describe the bug Man page said that rrdcached is supported by dump command, but really not works.

To Reproduce check if rrd exist:

$ rrdtool last spb-sdn-local2/uptime.rrd --daemon 127.0.0.1:42217
1637163600

try dump:

$ rrdtool dump spb-sdn-local2/uptime.rrd --daemon 127.0.0.1:42217
ERROR: opening 'spb-sdn-local2/uptime.rrd': No such file or directory

(dump without rrdcached is works):

$ rrdtool dump /opt/observium/rrd/spb-sdn-local2/uptime.rrd |head
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE rrd SYSTEM "https://oss.oetiker.ch/rrdtool/rrdtool.dtd">
<!-- Round Robin Database Dump -->
<rrd>
        <version>0003</version>
        <step>300</step> <!-- Seconds -->
        <lastupdate>1637163709</lastupdate> <!-- 2021-11-17 18:41:49 MSK -->

RRDtool on Ubuntu 20.04:

RRDtool 1.7.2  Copyright by Tobias Oetiker <[email protected]>
               Compiled Feb 26 2020 17:10:48