Why is PyMongo 3 giving ServerSelectionTimeoutError?

Question

I\'m using:

• Python 3.4.2
• PyMongo 3.0.2
• mongolab running mongod 2.6.9
• uWSGI 2.0.10
• CherryPy 3.7.0
• nginx 1.6.2

Answer 1

I had the same problem with Pymongo 3.5 Turns out replacing localhost with 127.0.0.1 or corresponding ip address of your mongodb instance solves the problem.