Whoops.. forgot to attach the code (modified example from http://en.wikipedia.org/wiki/Getaddrinfo). Also, this produces: AF_INET family integer is: 2 AF_INET6 family integer is: 10 family for result was 2 hostname: localhost family for result was 2 hostname: localhost family for result was 2 hostname: localhost family for result was 2 hostname: localhost family for result was 2 hostname: localhost family for result was 2 hostname: localhost on my Ubuntu 9.10 machine. - Eric On Mon, May 10, 2010 at 7:00 PM, Eric Perko wrote: > Alexis, > > What version of ROS and Ubuntu are you running? > > Also, could you try compiling and running the attached code? It uses a > similar call to the place that generates that error regarding finding > AF_INET addresses (comes from rosed xmlrpcpp XmlRpcSocket.cpp). I'm > wondering what network addresses you actually have if you don't have > AF_INET addresses for localhost when disconnected from the network... > > - Eric > > On Mon, May 10, 2010 at 6:34 PM, Ken Conley wrote: >> Hi Alexis, >> >> Personally, I'm stumped. This doesn't appear to be just a ROS network >> configuration issue. For some reason, your machine appears to be unable to >> resolve localhost, which should work even when you're not connected. I'm not >> aware of any reason why your ROS should work when you are plugged in versus >> unplugged, if in both cases you are using 'localhost'. Is it the case that >> you can ping localhost even when you're not connected? >> >>  - Ken >> >> On Mon, May 10, 2010 at 3:20 PM, Alexis Cheng >> wrote: >>> >>> Hi Ken, >>> >>> >>> >>> I changed ROS_IP to 127.0.0.1, but the problem is persisting. Are there >>> any steps/procedures to ensure the proper network configuration for >>> ROS besides those outlined in the wiki? >>> >>> >>> >>> Thanks! >>> >>> >>> >>> Alexis Cheng >>> >>> Electrical Engineering >>> >>> University of British Columbia >>> >>> >>> Hi Alexis, >>> >>> For some reason 'localhost' isn't resolving on your machine. I would >>> recommend trying using >>> >>> ROS_IP=127.0.0.1 >>> >>> instead of ROS_HOSTNAME=localhost. NOTE: this will disable your ability to >>> connect to remote machines with ROS. >>> >>>  - Ken >>> >>> >>> On Mon, May 10, 2010 at 3:09 PM, Alexis Cheng >>> wrote: >>>> >>>> Hi all, >>>> >>>> I have installed ROS on a single Ubuntu machine and it seems to be >>>> working while connected to the internet. However, roscore is unable to run >>>> without internet connection. Roswtf does not return any errors or warnings. >>>> >>>> ----- >>>> >>>> Roscore responds with: >>>> >>>> [ERROR] 1273528178.429037000: [registerService] Failed to contact master >>>> at [localhost:11311]. Retrying... >>>> >>>> Rosrun responds with: >>>> >>>> Couldn't find an AF_INET address for [localhost] >>>> [ERROR] 1273528740.753778000: [registerPublisher] Failed to contact >>>> master at [localhost:11311]. Retrying... >>>> >>>> ----- >>>> >>>> I have went through the network setup document on ROS wiki and it seems >>>> to pass the tests. I have also changed ROS_HOSTNAME to localhost. >>>> >>>> Has anyone encountered this problem before and managed to correct it? >>>> >>>> Thanks! >>>> >>>> Alexis Cheng >>>> Electrical Engineering >>>> University of British Columbia >>>> >>>> >>>> ________________________________ >>>> 30 days of prizes: Hotmail makes your day easier! Enter now >>>> _______________________________________________ >>>> ros-users mailing list >>>> ros-users@code.ros.org >>>> https://code.ros.org/mailman/listinfo/ros-users >>> >>> ________________________________ >>> Win a $10,000 shopping spree from Hotmail! Enter now Enter now >>> _______________________________________________ >>> ros-users mailing list >>> ros-users@code.ros.org >>> https://code.ros.org/mailman/listinfo/ros-users >>> >> >> >> _______________________________________________ >> ros-users mailing list >> ros-users@code.ros.org >> https://code.ros.org/mailman/listinfo/ros-users >> >> >