yarpserver failed when disconnect the eth cable to icub

[jimingda]

Hi,

when eth cable is connected to icub, the yarp server is normal as belowed,

icub@icubsrv:~$ yarpserver
     ==========================
    | __  __ ___  ____   ____  |
    | \ \/ //   ||  _ \ |  _ \ |
    |  \  // /| || |/ / | |/ / |
    |  / // ___ ||  _ \ |  _/  |
    | /_//_/  |_||_| \_\|_|    |
    |                          |
     ==========================

Call with --help for information on available options
Using port database: :memory:
Using subscription database: :memory:
IP address: default
Port number: 10000
[INFO] |yarp.os.Port|/icub| Port /icub active at tcp://10.0.0.1:10000/
Registering name server with itself
 * register "/icub" tcp "10.0.0.1" 10000
   + set "/icub" offers http name_ser local tcp fast_tcp mcast udp text text_ack bayer human mjpeg portmonitor priority rossrv shmem tcpros unix_stream xmlrpc
   + set "/icub" accepts http name_ser local tcp fast_tcp mcast udp text text_ack bayer human mjpeg portmonitor priority rossrv shmem tcpros unix_stream xmlrpc
   + set "/icub" ips "127.0.0.1" "10.0.0.1" "192.168.101.112" "172.17.0.1" "172.18.0.1" "::1" "fe80::c689:274f:61fc:225f%2" "fe80::e581:3f67:4209:8ee2%3"
   + set "/icub" process 17086
 * register fallback mcast "224.2.1.1" 10000
   + set fallback offers http name_ser local tcp fast_tcp mcast udp text text_ack bayer human mjpeg portmonitor priority rossrv shmem tcpros unix_stream xmlrpc
   + set fallback accepts http name_ser local tcp fast_tcp mcast udp text text_ack bayer human mjpeg portmonitor priority rossrv shmem tcpros unix_stream xmlrpc
   + set fallback ips "127.0.0.1" "10.0.0.1" "192.168.101.112" "172.17.0.1" "172.18.0.1" "::1" "fe80::c689:274f:61fc:225f%2" "fe80::e581:3f67:4209:8ee2%3"
   + set fallback process 17086
 * set "/icub" nameserver "true"
Name server can be browsed at http://10.0.0.1:10000/
Ok. Ready!

but when eth cable is disconnected, because i want to run the icubsim, yarp server failed

icub@icubsrv:~$ yarpserver

     ==========================
    | __  __ ___  ____   ____  |
    | \ \/ //   ||  _ \ |  _ \ |
    |  \  // /| || |/ / | |/ / |
    |  / // ___ ||  _ \ |  _/  |
    | /_//_/  |_||_| \_\|_|    |
    |                          |
     ==========================

Call with --help for information on available options
Using port database: :memory:
Using subscription database: :memory:
IP address: default
Port number: 10000
Overriding non-local address for name server
PROBLEM: need to change settings in /home/icub/.config/yarp/_icub.conf
  Current settings: host 10.0.0.1 port 10000 family yarp
  Desired settings:  host 172.17.0.1 port 10000 family yarp
Please specify '--write' if it is ok to overwrite current settings, or
Please specify '--read' to use the current settings, or
delete /home/icub/.config/yarp/_icub.conf
[ERROR] Aborting.

[Nicogene]

Hi @jimingda, the reason is because the eth interface is down and you cannot open the yarpserver on 10.0.0.1:10000, you can see it from the log:

  Current settings: host 10.0.0.1 port 10000 family yarp
  Desired settings:  host 172.17.0.1 port 10000 family yarp

You can create a namespace for using the simulator w/

yarp namespace /icubSim

and then run yarpserver --write.

You can switch back to the other namespace w/

yarp namespace /icub

Or even better you can leave the ethernet plugged in and use the simulator and you don't need to do anything I posted before.
It opens different ports respect the real robot then you should not have problem using them togheter