Questions tagged [rosmaster]

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Is there a way to get the package or directory/location of a running node?

Is there a way to get the package name or directory/location of a running node? Preferably from within a separate python node. Things I've tried: rosnode info ...
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ROS Topics Data Communication over separate networks

I want to send ROS Topic data from one ROS Master to another ROS Master. Both ROS Masters are on different networks. There is a limitation in my project for which I am receiving some data through a ...
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master_api.py exists, but rosmaster cannot locate it

When I run roscore, i get this: ...
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How to check if network connection or remote ROS Master is down?

I am running ROS (Kinetic on Ubuntu 16.04) on two machines (desktop pc and Jackal pc) and the Jackal pc is set as the ROS Master. The both machines are connected over a wireless network. I am writing ...
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Ros::ok() return true with dead roscore in node started as root

Hello, I am trying to kill my node started as root. In my case, my node need to be started as root to access some hardware (gpio). So I added sudo -E as a launch-...
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ROS with public Wifi

Hello everyone, I want to use ROS to comunicate Simulink and three drones Crazyflie. I have some problems using ROS with the public wifi of the University, when I type ...
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abnormal exited rosnode still be seen on Master?

Hello, everyone: I see Master is a xmlRPC server that maintains all the information of all nodes, but when a node abnormal exited, that node still can be seen on the master ? How can I check the ...
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How to find if nodes are running on the same machine?

Hello, everyone! I see ROS is a real distributed system, all nodes use node_name and node_uri to identify itself. Now I need to write a monitor process, to monitor all nodes on the same machine. From ...
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ROS networking unable to see mesages published by slave computer

I am running Ubuntu 16.04 and ROS Kinetic on both a Beaglebone black(Master) and intel NUC(Slave). My problem is connecting the NUC to the ros master on the beaglebone over wifi. I set the ip address ...
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Inform move_base about blocked plan

I saw that we can signal move_base that the path is blocked in order to recalculate the global plan as quoted in the next sentence. ~planner_frequency (double, default: 0.0) The rate in Hz at which ...
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Unable to receive data from ROS Master using Matlab

I would like to connect to ROS network using Matlab and plot the laser scanner data The ROS framework runs on a rover with IP address: 160.80.97.150. The rover is ...
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rosmaster dies all nodes need to restart

I am finding that if the the rosmaster node is rebooted on one machine and rosmaster is restarted I am finding I am having to restart all the other nodes on the remaining computer. Is their some how a ...
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Tests if ros master is not running using rostest

I like to write a test for a feature that detects if ros master is not running. Using rostest, which automatically starts ros master, is there a way to achieve this?...
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Which xml_rpc call performs rostopic list?

I want to dynamically publish from a cpp node to some only subscribed topics in a namespace. I tried to retrieve those topics using ros::master::getTopic , but ...
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How to handle disconnection/reconnection to the ROS master

I have written a ROS node, just publishing to a topic, using roscpp that runs on a separate machine to the ROS master. It is based on the simple publisher/subscriber tutorials. If the ROS master gets ...
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close roscore after running with roslaunch

Hi there, I have a roslaunch that i run two node with it in my pc, but when i close both of them, roscore are still is running, any tip appreciated. it is the output of my roslaunch: ...
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rospy Reaction to ROSCore Shutdown

When running a node in python (or C++), is there a way to detect the loss of ROSCore or the ROSMaster? I understand how to detect shutdown of the node itself, but need to be able to handle, in my own ...
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rosmaster deadlocks sometimes when respawning nodes with name conflicts

We have a set up where there is a single robot running ROS and we connect laptops to it. We need to use foreign relays to connect ROS running on the laptops to the robot. If the laptops both try to ...
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Security Vulnerabilities in ROS

As far as I'm aware, when a ROS master starts up on a machine, it opens a port for any network machine to attach to. This means that any machine with a route to the ROS machine can freely ask that ROS ...
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Foreign Relay Spams Topic

I have two ROS masters running on the same machine (on different ports) that I want to publish/subscribe a topic between one another. I've been using Foreign Relays for this purpose, since I've ...
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How to find out if Rosmaster is running yet?

I am trying to debug a node that is supposed to publish a "shutdown message" to a topic. Since I am running rostests on my nodes, this message is supposed to get published fairly early ...
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rosmaster zombie

I know zombie node can exist but is zombie master possible too? With the following step, I keep getting rosgraph.masterapi.Master instance even after I stop ...
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Is there a public ROS matster available?

Dear All, Since in our lab, we can not communicate with socket between two computer, is there a public ROS master available? Thus we can use two or more computer in my lab to connect this public ros ...
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Error: unable to communicate with master!

Doing the tutorials everything was fine until half way tutorial 5: Understanding Nodes part 1.6. At the step of using this command: $ rosrun turtlesim turtlesim_node __name:=my_turtle The name wasn't ...
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How can I get all currently running nodes from the master in rosjava?

Is there a simple way to retrieve all currently running nodes from the ros master in rosjava? In order to obtain all topics in the system the following works: ...
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Will this Project be possible? / ROS Time Syncronisation

Hi Guys, I would like to discuss the doability of a project. I want to run a couple of ARM Boards (Pandaboard ES) which are connected to each other with an Ethernet-switch. The Boards already run ROS ...
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Husky A200 crashed after Ubuntu 12.04 and Fuerte update

Hi, I updated the onboard mini-ITX PC in Husky A200 with Ubuntu 12.04 and ROS Fuerte today. while the installations were successful and i was able to complete all the procedures including the download ...
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rostopic not showing data electric

I have two laptops running Ubuntu lucid and ROS electric. I have written three publishers in roscpp that are publishing input data to rostopics. When running on one computer, I am able to see the ...
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Clarity on ROS Master

I have been intrigued by an aspect of the ROS Master that is not clear to me.. From ros.org ...
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rosmaster unresponsive

Hi guys, I have a somewhat weird problem with rosmaster. In certain situations rosmaster becomes completely unresponsive and reports 100% cpu usage. The situation occurred in Electric both under ...
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2 answers
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Possible to communicate with new master without process restart?

Often when debugging, a launch which was responsible for the original Master goes down. When this happens things that were connected that stay up are unable to communicate with the new Master when it ...
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3 answers
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Launching with parameters (was "How to block until a master is running")

I have a script that wraps rosbag play (because I need to set some rosparams first). However, if I run my script before my master finishes coming up, my calls to <...
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How to check if ROS-Master is running from rosjava

Im working on an android app which displays the camera image of the PR2. If the ROS-Master is running, everything works as expected. However, if the Master-Server is offline it tries to connect until ...
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