worker exit due to err <class '_queue.Empty'>

[actorTian]

Hi,

Run:
python3 node_crawler.py seed=104.200.136.212

Results:
Craw results 1
2021-12-22 10:36:33: worker exit due to err <class '_queue.Empty'>
Total: 1 Nodes
{"ID": "", "Port": "30001", "IpAddr": "104.200.136.212"}

Where am I going wrong, please