Required Process [fsds/ros_bridge-2] has died!

[shreyash-99]

I am trying to run fsds with ros bridge but i am not able to due to the following error. I even tried reinstalling it but got the same error. Ubuntu- 18.04 LTS ROS Melodic

Any help will be much appreciated!

roslaunch fsds_ros_bridge fsds_ros_bridge.launch 
... logging to /home/shreyash/.ros/log/a7181916-82f4-11ed-a921-38f9d36a6c99/roslaunch-shreyash-MacBookPro-13697.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://shreyash-MacBookPro:45295/

SUMMARY
========

PARAMETERS
 * /fsds/cameralauncher/host_ip: localhost
 * /fsds/ros_bridge/UDP_control: False
 * /fsds/ros_bridge/competition_mode: False
 * /fsds/ros_bridge/host_ip: localhost
 * /fsds/ros_bridge/manual_mode: False
 * /fsds/ros_bridge/mission_name: trackdrive
 * /fsds/ros_bridge/publish_static_tf_every_n_sec: 1.0
 * /fsds/ros_bridge/track_name: A
 * /fsds/ros_bridge/update_gps_every_n_sec: 0.1
 * /fsds/ros_bridge/update_gss_every_n_sec: 0.01
 * /fsds/ros_bridge/update_imu_every_n_sec: 0.004
 * /fsds/ros_bridge/update_lidar_every_n_sec: 0.1
 * /fsds/ros_bridge/update_odom_every_n_sec: 0.004
 * /rosdistro: melodic
 * /rosversion: 1.14.13

NODES
  /fsds/
    cameralauncher (fsds_ros_bridge/cameralauncher.py)
    ros_bridge (fsds_ros_bridge/fsds_ros_bridge)

auto-starting new master
process[master]: started with pid [13710]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to a7181916-82f4-11ed-a921-38f9d36a6c99
process[rosout-1]: started with pid [13724]
started core service [/rosout]
process[fsds/ros_bridge-2]: started with pid [13727]
process[fsds/cameralauncher-3]: started with pid [13732]
[ INFO] [1671822282.126896837]: Waiting for connection - 
[ INFO] [1671822282.532893066]: Connected to the simulator!
terminate called after throwing an instance of 'std::invalid_argument'
  what():  Failed loading settings.json.rpc::rpc_error during call
localhost
================================================================================REQUIRED process [fsds/ros_bridge-2] has died!
process has died [pid 13727, exit code -6, cmd /home/shreyash/Formula-Student-Driverless-Simulator/ros/devel/lib/fsds_ros_bridge/fsds_ros_bridge __name:=ros_bridge __log:=/home/shreyash/.ros/log/a7181916-82f4-11ed-a921-38f9d36a6c99/fsds-ros_bridge-2.log].
log file: /home/shreyash/.ros/log/a7181916-82f4-11ed-a921-38f9d36a6c99/fsds-ros_bridge-2*.log
Initiating shutdown!
================================================================================
[fsds/cameralauncher-3] killing on exit
[fsds/ros_bridge-2] killing on exit
Traceback (most recent call last):
  File "/usr/bin/rosversion", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3251, in <module>
    @_call_aside
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3235, in _call_aside
    f(*args, **kwargs)
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3287, in _initialize_master_working_set
    list(map(working_set.add_entry, sys.path))
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 623, in add_entry
    for dist in find_distributions(entry, True):
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2065, in find_on_path
    for dist in factory(fullpath):
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2135, in distributions_from_metadata
    root, entry, metadata, precedence=DEVELOP_DIST,
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2592, in from_location
    py_version=py_version, platform=platform, **kw
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2994, in _reload_version
    md_version = self._get_version()
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2772, in _get_version
    version = _version_from_file(lines)
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2556, in _version_from_file
    line = next(iter(version_lines), '')
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2767, in _get_metadata
    for line in self.get_metadata_lines(name):
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1911, in get_metadata_lines
    return yield_lines(self.get_metadata(name))
  File "/home/shreyash/.local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1898, in get_metadata
    metadata = f.read()
  File "/usr/lib/python2.7/codecs.py", line 311, in decode
    def decode(self, input, final=False):
KeyboardInterrupt
Traceback (most recent call last):
  File "/home/shreyash/Formula-Student-Driverless-Simulator/ros/src/fsds_ros_bridge/scripts/cameralauncher.py", line 38, in <module>
    launch.start()
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/scriptapi.py", line 107, in start
    self.parent.start(auto_terminate=False)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/parent.py", line 305, in start
    self._start_infrastructure()
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/parent.py", line 254, in _start_infrastructure
    self._load_config()
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/parent.py", line 157, in _load_config
    roslaunch_strs=self.roslaunch_strs, verbose=self.verbose)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/config.py", line 451, in load_config_default
    load_roscore(loader, config, verbose=verbose)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/config.py", line 94, in load_roscore
    loader.load(f_roscore, config, core=True, verbose=verbose)    
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 761, in load
    self._load_launch(launch, ros_config, is_core=core, filename=filename, argv=argv, verbose=verbose)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 733, in _load_launch
    self._recurse_load(ros_config, launch.childNodes, self.root_context, None, is_core, verbose)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 669, in _recurse_load
    default_machine, is_core, verbose)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 679, in _recurse_load
    self._param_tag(tag, context, ros_config, verbose=verbose)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 96, in call
    return f(*args, **kwds)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 286, in _param_tag
    "Invalid <param> tag: %s. \n\nParam xml is %s"%(e, tag.toxml()))
roslaunch.xmlloader.XmlParseException: Invalid <param> tag: Cannot load command parameter [rosversion]: command [['rosversion', 'roslaunch']] returned with code [1]. 

Param xml is <param command="rosversion roslaunch" name="rosversion"/>
[rosout-1] killing on exit
[master] killing on exit
shutting down processing monitor...
... shutting down processing monitor complete

[wouter-heerwegh]

Hi @shreyash-99

I don't think we support Mac OS out of the box, but seeing from the error logs, it seems to fail on trying to use localhost. Could you try to use the host argument to 127.0.0.1 or the assigned ip when launching the fsds_ros_bridge?

[MohakVyas]

Hey @wouter-heerwegh Tried this suggestion by changing the argument of host from localhost to 127.0.0.1 in the fsds_ros_bridge.cpp and the fsds_ros_bridge.launch files. But still receiving the same error when running fsds ros bridge. running ros noetic on ubuntu 20.04

[wouter-heerwegh]

@MohakVyas, are you using the v2.1.0 executable with the latest code? If so, can you try to run git checkout v2.1.0 and rebuild and install Airsim?

[ThoroMech]

Hi @wouter-heerwegh and @MohakVyas

I am new to the simulator (v2.1.0, Ubuntu 22.04 with ros2 humble) and am getting the same error:

fsds_ros2_bridge-3] terminate called after throwing an instance of 'std::invalid_argument' [fsds_ros2_bridge-3] what(): Failed loading settings.json.rpc::rpc_error during call

My debugging so far (Apologies if this is obvious/not helpful):

my error is coming from line 18 of airsim_ros_wrapper.cpp:

18 std::string settings_text = airsimclient.getSettingsString();

getSettingsString() is declared in lines 379-382 of RpcLibClientBase.cpp:

379 std::string RpcLibClientBase::getSettingsString() const 380 { 381 return pimpl_->client.call("getSettingsString").as(); 382 }

[wouter-heerwegh]

Hi @ThoroMech,

This is a mismatch in versions of the rpc server. This issue is introduced by #324, where the functionality of the rpc api was updated. V2.1.0 Does not contain the functionality to get the settings in that way. #333 Should fix this.

For now, it is best to use the source code at tag v2.1.0 or use any commit between v2.1.0 and 3047f0e24dce71b127577eee60150db4540fcfde

To switch to the fsds_ros_bridge/fsds_ros2_bridge code of v2.1.0 use git checkout tags/v2.1.0. Your orther options for now is to run it in unreal engine (which I don't advice if you don't need to use it).

I'll try to release v2.2.0 this weekend

[ThoroMech]

Thankyou @wouter-heerwegh

I am new to a lot of this, your effort is appreciated.

My understanding now is: prior to #327 AirSim/setup.sh will not work on 22.04 due to clang compatibility, and as you stated ros2_bridge has the rpc error after #324.

I have tried a couple different things but am unable to build the ros2_bridge from <#324 with airsim setup >#327. Is there a way to overcome this without reverting to a compatible ubuntu?

I might be best waiting for v2.20.

[wouter-heerwegh]

Hi @ThoroMech,

You could apply the changes from #327 manually to your local prpject to get it up and running. I'm still having an issue in the current build (#289), if I can't get it fixed by the weekend, I'll release v2.2.0.

[wouter-heerwegh]

Sorry that it took a bit longer, but release v2.2.0 is available. Test it out and feel free to give feedback.

If the above issue is fixed you can close this issue.

[ThoroMech]

Thanks Again @wouter-heerwegh,

Having some PC issues at the moment, hopefully have them sorted and be able to test ROS2 bridge by next weekend.

[ThoroMech]

Thanks Wouter

Everything is working well for me so far. The update has also fixed the binary loading to black screen. only thing i have found is FSDS.sh needs to be made executable before using since the update.

[wouter-heerwegh]

@ThoroMech thanks for the feedback. I uploaded a new zip file for the linux version with the FSDS.sh script as an executable.

I'm closing this issue as I expect it is fixed, if not, feel free to reopen.