[ros-users] rosjava bug and message overflow

[Brian Gerkey]

Btw, rosjava is in need of a maintainer.

I did a bit of work this morning to get rosjava, test_rosjava, and
rosclj unblacklisted and building against both boxturtle and latest.
 So at least our continuous integration system
(http://build.willowgarage.com/) will let us know if they stop
working.

But in the long term, we'll need somebody who uses rosjava to
volunteer to maintain it.

	brian.

On Wed, Apr 21, 2010 at 1:16 PM, Brett Ponsler <bponsler at wpi.edu> wrote:
> Hello everyone,
>
> I joined the mailing list yesterday and so I apologize if these points have
> been brought up previously.
>
> Here's a little background information: I am running ROS on Ubuntu 9.10. I
> am using both roscpp and rosjava on two machines.
>
> First of all, I have noticed a bug with rosjava. When creating constant
> Strings within an ROS message it fails to add the surrounding quotations.
> For example:
>
> string TEMP=HELLO
>
> Would become: public static final String TEMP = HELLO;
>
> Instead of: public static final String TEMP = "HELLO";
>
> Is this currently being fixed? If not, I can provide a patch for the bug.
>
> Now for the real question: Is there a maximum length for the size of a
> string that can be sent through an ROS message? I have noticed that there
> seems to be a limit of about 475 characters after which it causes a buffer
> overflow (we have observed ROS completely crashing when a string of 476
> characters is sent but not when 475 are sent).
>
> The crash occurs prior to entering the subscribed method, which is why I
> assume it's in the ROS library.
>
> Thanks for your help,
>
> Brett Ponsler
>
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