ServerSelectionTimeoutError - [Errno -2] Name or service not known

[em0ney]

Hi there,

Having issues getting mongo-connector running in my docker container.

I am attempting to run mongo-connector like so:

 $ mongo-connector --auto-commit-interval=0 --oplog-ts=/data/oplog.ts -m ${mongoUrl}  -a ${user} -p ${pass} -t ${elasticsearch}:${elasticport} -d elastic2_doc_manager -n ${nameSpaceSet} --continue-on-error

The mongoUrl I am using (mongodb://XXX.XXX.XX.3:27017,XXX.XXX.XX.2:27017,XXX.XXX.XX.1:27017) is comprised of the local ip addresses for each of these mongo nodes (when connected to VPN can confirm that I can connect to mongo manually). I have tried different varieties of this, with the ?replicaSet= parameter, and also trying to use the localDNS entries like those that come up in the error messages below.

Error Messages:

pymongo.errors.ServerSelectionTimeoutError: ip-XXX-XXX-XX-3.ap-southeast-2.compute.internal:27017: [Errno -2] Name or service not known,ip-XXX-XXX-XX-2.ap-southeast-2.compute.internal:27017: [Errno -2] Name or service not known,ip-XXX-XXX-XX-1.ap-southeast-2.compute.internal:27017: [Errno -2] Name or service not known

Here is the traceback:

2016-11-19 04:24:26,383 [ERROR] mongo_connector.util:92 - Fatal Exception
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/site-packages/mongo_connector/util.py", line 90, in wrapped
    func(*args, **kwargs)
  File "/usr/local/lib/python3.4/site-packages/mongo_connector/connector.py", line 263, in run
    main_conn['admin'].authenticate(self.auth_username, self.auth_key)
  File "/usr/local/lib/python3.4/site-packages/pymongo/database.py", line 1018, in authenticate
    connect=True)
  File "/usr/local/lib/python3.4/site-packages/pymongo/mongo_client.py", line 439, in _cache_credentials
    writable_preferred_server_selector)
  File "/usr/local/lib/python3.4/site-packages/pymongo/topology.py", line 210, in select_server
    address))
  File "/usr/local/lib/python3.4/site-packages/pymongo/topology.py", line 186, in select_servers
    self._error_message(selector))

Hope to hear from you soon with some guidance on this!

[ShaneHarvey]

You must configure MongoDB to use hostnames that are resolvable by the mongo-connector server and the other replica members. For more details, see #391 (comment).