rosnode kill /rostful (pyros) doesnt stop update

[asmodehn]

An easy way to test is to put a print statement in the ros_interface.update loop.

Something is strange there, the child process should be the one known by the node, and the one killed.
In that process the ros interface should be running...

[asmodehn]

BEFORE

alexv@asmodehn:~$ pstree -psl 10320 
init(1)───lightdm(1877)───lightdm(32721)───init(5841)───xfce4-terminal(22140)───bash(24912)───pycharm.sh(16321)───java(16389)───bash(16687)───python(10320)─┬─rostful(10348)───python(10353)─┬─python(10357)─┬─{python}(10418)
                                                                                                                                                            │                                │               └─{python}(10443)
                                                                                                                                                            │                                ├─python(10378)
                                                                                                                                                            │                                └─python(10403)─┬─{python}(10416)
                                                                                                                                                            │                                                ├─{python}(10417)
                                                                                                                                                            │                                                ├─{python}(10423)
                                                                                                                                                            │                                                ├─{python}(10424)
                                                                                                                                                            │                                                ├─{python}(10427)
                                                                                                                                                            │                                                └─{python}(10445)
                                                                                                                                                            ├─{python}(10336)
                                                                                                                                                            └─{python}(10337)
alexv@asmodehn:~$ ps aux | grep rostful
alexv    10320  0.7  0.1 297352 25592 pts/9    Sl+  09:54   0:00 python /home/alexv/ROS/gopher_desktop/devel/bin/roslaunch rostful rostful.launch --screen
alexv    10348  0.0  0.0  29644  3392 ?        Ss   09:54   0:00 /bin/bash /home/alexv/ROS/gopher_bootstrap/src/rostful/scripts/rostful -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log ~connections_list:=/rocon/connection_cache/list ~connections_diff:=/rocon/connection_cache/diff __name:=rostful __log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10353  0.2  0.1 111016 31112 ?        S    09:54   0:00 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10357  0.0  0.1 222188 23544 ?        Sl   09:54   0:00 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10378  0.0  0.1 179704 23804 ?        S    09:54   0:00 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10403  1.0  0.2 533820 43200 ?        Sl   09:54   0:01 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    11026  0.0  0.0  20420  2132 pts/296  S+   09:56   0:00 grep --color=auto rostful

alexv@asmodehn:~$ rosnode kill /rostful
killing /rostful
killed

shutdown request : user request

AFTER

alexv@asmodehn:~$ pstree -psl 10320
init(1)───lightdm(1877)───lightdm(32721)───init(5841)───xfce4-terminal(22140)───bash(24912)───pycharm.sh(16321)───java(16389)───bash(16687)───python(10320)─┬─rostful(10348)───python(10353)─┬─python(10357)─┬─{python}(10418)
                                                                                                                                                            │                                │               └─{python}(10443)
                                                                                                                                                            │                                ├─python(10378)
                                                                                                                                                            │                                └─python(10403)─┬─{python}(10416)
                                                                                                                                                            │                                                ├─{python}(10417)
                                                                                                                                                            │                                                └─{python}(10427)
                                                                                                                                                            ├─{python}(10336)
                                                                                                                                                            └─{python}(10337)
alexv@asmodehn:~$ ps aux | grep rostful
alexv    10320  0.4  0.1 297352 25592 pts/9    Sl+  09:54   0:01 python /home/alexv/ROS/gopher_desktop/devel/bin/roslaunch rostful rostful.launch --screen
alexv    10348  0.0  0.0  29644  3392 ?        Ss   09:54   0:00 /bin/bash /home/alexv/ROS/gopher_bootstrap/src/rostful/scripts/rostful -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log ~connections_list:=/rocon/connection_cache/list ~connections_diff:=/rocon/connection_cache/diff __name:=rostful __log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10353  0.1  0.1 111016 31112 ?        S    09:54   0:00 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10357  0.0  0.1 222188 23544 ?        Sl   09:54   0:00 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10378  0.0  0.1 179704 23804 ?        S    09:54   0:00 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    10403  0.9  0.2 607552 43308 ?        Sl   09:54   0:02 python -tt -m rostful run -h 127.0.0.1 -p 8080 -s flask -c /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.cfg -l /home/alexv/ROS/gopher_bootstrap/src/rostful/instance/rostful.log --ros-arg=~connections_list:=/rocon/connection_cache/list --ros-arg=~connections_diff:=/rocon/connection_cache/diff --ros-arg=__name:=rostful --ros-arg=__log:=/home/alexv/.ros/log/0cc1a44e-9cf6-11e6-abf8-0862664558c8/rostful-1.log
alexv    11601  0.0  0.0  20420  2144 pts/302  S+   09:58   0:00 grep --color=auto rostful

[asmodehn]

Actually rosnode kill is NOT using Unix signals : https://github.com/ros/ros_comm/blob/kinetic-devel/tools/rosnode/src/rosnode/__init__.py#L224

So there are two ways to shutdown nodes and we need to test both....