CLI upgrade command does not work

Run my backup server with default standalone.xml configuration
./standalone.sh -c standalone.xml -Djboss.socket.binding.port-offset=111 -Djboss.node.name=BACKUPER
Run my new server with
./standalone.sh -c standalone-hotrod-rolling-upgrade.xml -Djboss.node.name=UPGRADER
1) run command on BACKUPER
[remoting://localhost:10110/local/default]> upgrade --dumpkeys default
ISPN019502: Dumped keys for cache default
2) run command on UPGRADER
[remoting://localhost:9999/local/default]> upgrade --synchronize=hotrod default
ISPN019026: An error occurred while synchronizing data for cache 'hotrod' using migrator 'default' from the source server