烧瓶 - pymongo.errors.ServerSelectionTimeoutError

Question

For some reason, my flask project stopped working. When I run "python run.py", my app crash. See below a screenshot of the errors in my terminal. I have checked my password and the mongoDB URI and they are both correct.

I also restarted my laptop, reinstall all the pip dependencies.

I also tried to downgrade pymongo dep.

Any help/suggestion is welcome.

Pymongo errors screenshot

Answer 1

Most likely a connection to a backend component (like a mongo database) is not working, but your calling code is not surfacing the connection error.

I encountered this error in using a function from a module that was calling Mongo, but Mongo wasn't running. When I put the code that had the mongo dependency in a try/except block and exposed the error I realized what the problem was:

Error: localhost:27017: [Errno 61] Connection refused, Timeout: 30s, Topology Description: <TopologyDescription id: 62c98060ffc5725d82895ab4, topology_type: Unknown, servers: [<ServerDescription ('localhost', 27017) server_type: Unknown, rtt: None, error=AutoReconnect('localhost:27017: [Errno 61] Connection refused')>]>

I just restarted my Mongo and the error cleared.