[ros-users] Running Roscore without internet

[Eric Perko]

Alexis,

Can you successfully ping localhost?

What are the contents of /etc/hosts on your machine? Is there an entry
such as "127.0.0.1       localhost"?

- Eric

On Mon, May 10, 2010 at 6:11 PM, Ken Conley <kwc at willowgarage.com> wrote:
> 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 <acheng_1221 at hotmail.com>
> 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
>>
>>
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>
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