socket.gaierror: [Errno -5] No address associated with hostname

[WangLanxiao]

Thanks for your help. I meet some strange errors as below.
The log file is:
2022-10-08 19:57:58,183 WARNING worker.py:1189 -- The agent on node amax failed with the following error:
Traceback (most recent call last):
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/new_dashboard/agent.py", line 354, in
loop.run_until_complete(agent.run())
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/asyncio/base_events.py", line 568, in run_until_complete
return future.result()
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/new_dashboard/agent.py", line 144, in run
modules = self._load_modules()
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/new_dashboard/agent.py", line 98, in _load_modules
c = cls(self)
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/new_dashboard/modules/reporter/reporter_agent.py", line 148, in init
self._metrics_agent = MetricsAgent(dashboard_agent.metrics_export_port)
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/_private/metrics_agent.py", line 77, in init
namespace="ray", port=metrics_export_port)))
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/_private/prometheus_exporter.py", line 334, in new_stats_exporter
options=option, gatherer=option.registry, collector=collector)
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/_private/prometheus_exporter.py", line 266, in init
self.serve_http()
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/ray/_private/prometheus_exporter.py", line 321, in serve_http
port=self.options.port, addr=str(self.options.address))
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/prometheus_client/exposition.py", line 168, in start_wsgi_server
TmpServer.address_family, addr = _get_best_family(addr, port)
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/site-packages/prometheus_client/exposition.py", line 157, in _get_best_family
infos = socket.getaddrinfo(address, port)
File "/data1/wlx/anaconda3/envs/bottomup/lib/python3.7/socket.py", line 748, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -5] No address associated with hostname

[1219521375]

It seems that there is a problem with ray. You can remove the --fastmode to use the non accelerated version.
I have never encountered this problem in local development. If the code reports an error at ray.init(), you can try this solution