[ros-users] beginner logging question
Tully Foote
tfoote at willowgarage.com
Sat Jul 10 01:17:53 UTC 2010
Michael, It sounds like you do not have your netowrk setup quite right. ROS
requires bidirectional communication between hosts, by self reported
hostname. Often hostnames of computers are not setup correctly. I suspect
that if you set you ROS_HOSTNAME or ROS_IP for your workstation and possibly
robot it will work. See http://www.ros.org/wiki/ROS/EnvironmentVariables
<http://www.ros.org/wiki/ROS/EnvironmentVariables>For clarification:
If the logging level is set at or below the event, will go to rosout and
appear in rxconsole.
Roslaunch doesn't effect the logging level. The output="screen" or
output="log" simply redirects the stdout pipe to one or the other. You
should see the same thing on the screen running a node on the command line
or in roslaunch(either on the screen or in the log file).
Tully
On Fri, Jul 9, 2010 at 6:02 PM, Michael Styer <michael at styer.net> wrote:
> OK, fwiw I've found a partial solution to the problem. I wrote a little
> test app (pasted below). On my workstation I set
> ROS_MASTER_URI=http://robot:11311 and run rxconsole. Then, if I run my
> test app in a terminal on my workstation, I get output at the terminal
> but not in rxconsole. If I SSH to the robot and run my test app there, I
> get output both on the terminal and on rxconsole. The same is true of
> the real node I'm writing.
>
> Is that expected? I.e., should I expect rosconsole messages from a node
> running on machine A to be reported by machine B? It seems like I
> should, but that's not what's happening. Could there be something not
> configured correctly in our setup?
>
> Thanks for your help!
>
> Mike
>
> PS: here's my test app. I just run it with 'rosrun <package> log_test'.
>
> #include <ros/ros.h>
>
> int main(int argc, char** argv)
> {
> if (argc<2) {
> printf("Usage: %s <log_level>\n", argv[0]);
> return 0;
> }
> ros::init(argc, argv, "log_test");
>
> ros::NodeHandle nh;
> ros::Rate loop_rate(1);
> while (nh.ok()) {
> switch (atoi(argv[1])) {
> case 1:
> ROS_DEBUG("Beep");
> break;
> case 2:
> ROS_INFO("Beep");
> break;
> case 3:
> ROS_WARN("Beep");
> break;
> case 4:
> ROS_ERROR("Beep");
> break;
> }
> loop_rate.sleep();
> }
> }
>
> On Fri, 2010-07-09 at 16:59 -0700, Michael Styer wrote:
> > Thanks for the suggestion, Jan. I just tried that now, and noticed the
> > 'output' parameter to the node tag. If I set it to 'screen', I get my
> > debug messages on the terminal; if I set it to 'log', they don't appear
> > on the terminal, but they don't appear in rxconsole either.
> >
> > I also just noticed that no messages from my node get sent to rxconsole,
> > regardless of level. Changing ROS_DEBUG to ROS_WARN still doesn't make
> > them appear. So it doesn't seem to be a problem with the logging level.
> > I'll keep digging into it, but thanks for your help.
> >
> > Mike
> >
> > On Sat, 2010-07-10 at 01:29 +0200, "Jan Tünnermann" wrote:
> > > Hello Mike,
> > >
> > > I'm quite a beginner myself, so I'm not sure if I can help.
> > > I noticed that starting nodes by directly executing the binary would
> lead
> > > to ROS_INFO output to stdout. Starting via a .launch-file and roslaunch
> > > leads to output in the rxconsole. I'm not sure if that could be the
> issue
> > > in your case...
> > >
> > > jan
> > >
> > >
> > > Am Sa, 10.07.2010, 01:10 schrieb Michael Styer:
> > > > Hello,
> > > >
> > > > I have an elementary question about logging in roscpp.
> > > >
> > > > In my node, I have a bunch of ROS_DEBUG("hello world") statements
> that
> > > > I'd like to see in rxconsole. At first, when I ran the node, I didn't
> > > > see those statements anywhere. Reading through the documentation I
> > > > figured out that I can change the default logging level for my
> package
> > > > by creating a local rosconsole.config file; I did that, and now I see
> my
> > > > debugging statements printed to stdout in the terminal where I
> started
> > > > the node.
> > > >
> > > > But I still don't see any of those statements in rxconsole (there are
> > > > lots of other things printed to rxconsole, though). I have all the
> > > > "Severity" boxes checked, I don't have the "Enabled" box checked, and
> > > > when I bring up rxloggerlevel, the level for my package is "Debug".
> > > >
> > > > What am I missing?
> > > >
> > > > Thanks!
> > > >
> > > > Mike
> > > >
> > > >
> > > > _______________________________________________
> > > > ros-users mailing list
> > > > ros-users at code.ros.org
> > > > https://code.ros.org/mailman/listinfo/ros-users
> > > >
> > > >
> > >
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> >
> >
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>
>
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--
Tully Foote
Systems Engineer
Willow Garage, Inc.
tfoote at willowgarage.com
(650) 475-2827
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