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

pymongo 3 will not tell you your connection failed when you instantiate your client. You may not be connected.

https://api.mongodb.com/python/3.5.1/api/pymongo/mongo_client.html

"it no longer raises ConnectionFailure if they are unavailable .. You can check if the server is available like this:"

from pymongo.errors import ConnectionFailure
client = MongoClient()
try:
    # The ismaster command is cheap and does not 
require auth.
    client.admin.command('ismaster')
except ConnectionFailure:
    print("Server not available")