REQUIRED process [r3live_mapping-3] has died! about r3live HOT 4 CLOSED

I have encountered the same bug, have you solved it?

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I have encountered the same bug too！
in ~/.ros/log/46ca3042-89aa-11ec-83ff-4851c5f254c2/master.log

[rosmaster.master][INFO] 2022-02-09 21:15:05,182: -PUB [/laser_cloud_sharp] /r3live_LiDAR_front_end http://ll:44233/
[rosmaster.master][INFO] 2022-02-09 21:15:05,183: -SUB [/livox/lidar] /r3live_LiDAR_front_end http://ll:44233/
[rosmaster.master][INFO] 2022-02-09 21:15:05,183: -SERVICE [/r3live_LiDAR_front_end/get_loggers] /r3live_LiDAR_front_end rosrpc://ll:44559
[rosmaster.master][INFO] 2022-02-09 21:15:05,183: -SERVICE [/r3live_LiDAR_front_end/set_logger_level] /r3live_LiDAR_front_end rosrpc://ll:44559
[rosmaster.master][INFO] 2022-02-09 21:15:05,280: publisherUpdate[/rosout] -> http://ll:46605/ ['http://ll:43601/', 'http://ll:38067/', 'http://ll:44369/']
[rosmaster.master][INFO] 2022-02-09 21:15:05,281: publisherUpdate[/rosout] -> http://ll:46605/ ['http://ll:43601/', 'http://ll:38067/', 'http://ll:44369/']: sec=0.00, result=[1, '', 0]
[rosmaster.master][INFO] 2022-02-09 21:15:05,281: publisherUpdate[/laser_cloud_flat] -> http://ll:38067/ []
[rosmaster.master][INFO] 2022-02-09 21:15:05,281: publisherUpdate[/laser_cloud_flat] -> http://ll:38067/ []: sec=0.00, exception=[Errno 111] Connection refused
[rosmaster.threadpool][ERROR] 2022-02-09 21:15:05,282: Traceback (most recent call last):
File "/opt/ros/melodic/lib/python2.7/dist-packages/rosmaster/threadpool.py", line 218, in run
result = cmd(*args)
File "/opt/ros/melodic/lib/python2.7/dist-packages/rosmaster/master_api.py", line 210, in publisher_update_task
ret = xmlrpcapi(api).publisherUpdate('/master', topic, pub_uris)
File "/usr/lib/python2.7/xmlrpclib.py", line 1243, in call
return self.__send(self.__name, args)
File "/usr/lib/python2.7/xmlrpclib.py", line 1602, in __request
verbose=self.__verbose
File "/usr/lib/python2.7/xmlrpclib.py", line 1283, in request
return self.single_request(host, handler, request_body, verbose)
File "/usr/lib/python2.7/xmlrpclib.py", line 1311, in single_request
self.send_content(h, request_body)
File "/usr/lib/python2.7/xmlrpclib.py", line 1459, in send_content
connection.endheaders(request_body)
File "/usr/lib/python2.7/httplib.py", line 1095, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 898, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 860, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", line 837, in connect
self.timeout, self.source_address)
File "/usr/lib/python2.7/socket.py", line 575, in create_connection
raise err
error: [Errno 111] Connection refused

found a solution: Livox-SDK/livox_mapping#1
but, i want in ubuntu18.04, now have no idea.....

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I encounter this problem after coming back to this algorithm to check something

• Basically the packages are been refused as either your firewall is blocking them or your ports are not open. If you isolate your machine from your network that may help
• Additionaly I encounter the fact that docker (not sure why?) create a higher priority routing destination. I modifed using ifmetric. After reducing the priority with sudo ifmetric docker0 200 it even dissapear (weird...)

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I have faced the same problem and resolved it through 您好，请问您在测试的时候有遇到过这个问题吗 #11。
I think it is about opencv. When installing ros, opencv3.2 has been automatically installed, but I also installed opencv4.5.3 myself,
so I modified lines 94, 96, and 119 in (/opt/ros/melodic/share/cv_bridge/make/cv_bridgeConfig.cmake) to correspond to 4.5.3

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