[ros-users] getting a topic's md5sum without subscribing

[Josh Faust]

Do you not get warnings when doing that?  I'm pretty sure we've been meaning
to remove that ability, and you should be getting a warning like:

"Advertising on topic [<topic>] with md5sum [*].  If you are not playing
back an old bag file, this is a problem."

What output do you get when they mismatch?

Josh

On Sat, Mar 27, 2010 at 11:31 PM, Ken Tossell <ktossell at umd.edu> wrote:

> Thanks, Eric and Josh. I've used the ShapeShifter class from topic_tools
> to build a multi-topic, on-demand proxy. It's still advertising its
> topics using the '*' checksum since I really don't want to have it
> subscribe to any topics before it starts advertising them, but that
> seems to work all right (and should be fine as long as you don't have
> mismatched messages [?]).
>
> http://www.ros.org/wiki/proxy
>
> I constructed a message mismatch -- where the sender and the receiver
> (across a repeater) had different message definitions -- and tested it
> using rostopic. The connection was dropped immediately.
>
> Ken
>
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ros.org/pipermail/ros-users/attachments/20100329/af620c28/attachment-0003.html>