Re: [ros-users] Weird behavior when instantiating SimpleAct…

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Author: User discussions
Date:  
To: User discussions
Subject: Re: [ros-users] Weird behavior when instantiating SimpleActionClient right after initializing node in rospy
Chris,

I can't reproduce this error on my machine. For me, the sleep happens, then
the node waits 10 seconds and exits.

Also, you should probably re-post this question on answers.ros.org instead
of this list. Its a much nicer forum for answering these kinds of questions
as it supports better search and voting than the mailing list. When you
re-post, it'd also be helpful to see the error message you're receiving.

Hope all is well,

Eitan

On Thu, Jun 16, 2011 at 2:31 PM, Chris Bersch <>wrote:

> Hi all,
>
> I ran into a problem when I ran python scripts where an actionlib
> action client is intantiated right after the node a the
> wait_for_server() function does not seem to work properly (it just
> does not wait).
>
>
> if __name__ == '__main__':
>   rospy.init_node('test_manipulation')
> #    rospy.sleep(1.0)

>
>   trajClient =
> actionlib.SimpleActionClient("r_arm_controller/joint_trajectory_action",
> pr2_controllers_msgs.msg.JointTrajectoryAction)
>   if not trajClient.wait_for_server(rospy.Duration(10.0)):
>       rospy.logerr("Could not connect to actionserver " )
>       exit(1)

>
>
> will return immediately with an error, even though I would expect it
> to wait 10s. If I uncomment rospy.sleep(1.0), everything works always
> as expected. Is there a more elegant solution to this?
>
> Chris
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