Writing a tf2 broadcaster(Python): process has died [exit code -11]
Hello, I'm following the tutorial on tf2 part 2
I followed all the steps but two errors occurred each time I use roslaunch command. I really can't figure out the problem...
Here's the verbose output of catkin_make:
$ catkin_make VERBOSE=1 Base path: /home/parallels/Desktop/workspace_prova Source space: /home/parallels/Desktop/workspace_prova/src Build space: /home/parallels/Desktop/workspace_prova/build Devel space: /home/parallels/Desktop/workspace_prova/devel Install space: /home/parallels/Desktop/workspace_prova/install #### #### Running command: "make cmake_check_build_system" in "/home/parallels/Desktop/workspace_prova/build" #### -- Using CATKIN_DEVEL_PREFIX: /home/parallels/Desktop/workspace_prova/devel -- Using CMAKE_PREFIX_PATH: /home/parallels/Desktop/workspace_prova/devel;/opt/ros/melodic -- This workspace overlays: /home/parallels/Desktop/workspace_prova/devel;/opt/ros/melodic -- Found PythonInterp: /home/parallels/.conda/envs/py27/bin/python2 (found suitable version "2.7.15", minimum required is "2") -- Using PYTHON_EXECUTABLE: /home/parallels/.conda/envs/py27/bin/python2 -- Using Debian Python package layout -- Using empy: /usr/bin/empy -- Using CATKIN_ENABLE_TESTING: ON -- Call enable_testing() -- Using CATKIN_TEST_RESULTS_DIR: /home/parallels/Desktop/workspace_prova/build/test_results -- Found gmock sources under '/usr/src/googletest': gmock will be built -- Found PythonInterp: /home/parallels/.conda/envs/py27/bin/python2 (found version "2.7.15") -- Found gtest sources under '/usr/src/googletest': gtests will be built -- Using Python nosetests: /usr/bin/nosetests-2.7 -- catkin 0.7.14 -- BUILD_SHARED_LIBS is on -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- ~~ traversing 1 packages in topological order: -- ~~ - learning_tf2 -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- +++ processing catkin package: 'learning_tf2' -- ==> add_subdirectory(learning_tf2) -- Using these message generators: gencpp;geneus;genlisp;gennodejs;genpy -- Configuring done -- Generating done -- Build files have been written to: /home/parallels/Desktop/workspace_prova/build #### #### Running command: "make VERBOSE=1 -j2 -l2" in "/home/parallels/Desktop/workspace_prova/build" #### /usr/bin/cmake -H/home/parallels/Desktop/workspace_prova/src -B/home/parallels/Desktop/workspace_prova/build --check-build-system CMakeFiles/Makefile.cmake 0 /usr/bin/cmake -E cmake_progress_start /home/parallels/Desktop/workspace_prova/build/CMakeFiles /home/parallels/Desktop/workspace_prova/build/CMakeFiles/progress.marks make -f CMakeFiles/Makefile2 all make[1]: Entering directory '/home/parallels/Desktop/workspace_prova/build' make[1]: Nothing to be done for 'all'. make[1]: Leaving directory '/home/parallels/Desktop/workspace_prova/build' /usr/bin/cmake -E cmake_progress_start /home/parallels/Desktop/workspace_prova/build/CMakeFiles 0
The output of the roslaunch:
$ roslaunch learning_tf2 start_demo.launch
... logging to /home/parallels/.ros/log/b5e285e2-39b2-11e9-9a4f-001c42e74aa6/roslaunch-parallels-Parallels-Virtual-Platform-9918.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
started roslaunch server http://parallels-Parallels-Virtual-Platform:38695/
SUMMARY
========
PARAMETERS
* /rosdistro: melodic
* /rosversion: 1.14.3
* /turtle1_tf2_broadcaster/turtle: turtle1
* /turtle2_tf2_broadcaster/turtle: turtle2
NODES
/
sim (turtlesim/turtlesim_node)
teleop (turtlesim/turtle_teleop_key)
turtle1_tf2_broadcaster (learning_tf2/turtle_tf2_broadcaster.py)
turtle2_tf2_broadcaster (learning_tf2/turtle_tf2_broadcaster.py)
ROS_MASTER_URI=http://localhost:11311 process[sim-1]: started with pid [9936] process[teleop-2]: started with pid [9937] process[turtle1_tf2_broadcaster-3]: started with pid [9938] process[turtle2_tf2_broadcaster-4]: started with pid [9939]
Reading from keyboard
---------------------------
Use arrow keys to move the turtle.
[turtle1_tf2_broadcaster-3] process has died [pid 9938, exit code -11, cmd /home/parallels/Desktop/workspace_prova/src/learning_tf2/nodes/turtle_tf2_broadcaster.py __name:=turtle1_tf2_broadcaster __log:=/home/parallels/.ros/log/b5e285e2-39b2-11e9-9a4f-001c42e74aa6/turtle1_tf2_broadcaster-3.log]. log file ...
Actually the turtlesim pop out also without the roscore running.. seems strange
Just tested quickly and it works fine for me... Did you change anything in the python code? The turtle being spawn without a master (roscore) is normal, as when launching a file a master is started automatically if needed.
Nice to know that about the launch; i didn't change anything, just copy and paste. Maybe i forgot some passage in the building of the pkg or the workspace, but i created a new workspace, sourced the setup.bash and used the command to auto-create a pkg