testcontainers / testcontainers/testcontainers-python
MongoDbContainer on Windows 10 fails with getaddrinfo error
Nobody has claimed this yet.
- Dominant language
- Python
- Stars
- 2.3k
- Forks
- 386
- Avg merge
- 4h 40m
- Merged PRs (30d)
- 1
Description
The following code fails with testcontainers-python 3.0.2:
from testcontainers.mongodb import MongoDbContainer
with MongoDbContainer('mongo:4.2.2') as mongo_:
... db = mongo_.get_connection_client().test
... db.test.insert_one({'foo': 'bar'})
with
Pulling image mongo:4.2.2
Container started: d5ca66c443
Traceback (most recent call last):
File "<input>", line 3, in <module>
File "C:\...\venv\lib\site-packages\pymongo\collection.py", line 695, in insert_one
self._insert(document,
File "C:\...\venv\lib\site-packages\pymongo\collection.py", line 610, in _insert
return self._insert_one(
File "C:\...\venv\lib\site-packages\pymongo\collection.py", line 599, in _insert_one
self.__database.client._retryable_write(
File "C:\...\venv\lib\site-packages\pymongo\mongo_client.py", line 1490, in _retryable_write
with self._tmp_session(session) as s:
File "C:\Program Files\Python38\lib\contextlib.py", line 113, in __enter__
return next(self.gen)
File "C:\...\venv\lib\site-packages\pymongo\mongo_client.py", line 1823, in _tmp_session
s = self._ensure_session(session)
File "C:\...\venv\lib\site-packages\pymongo\mongo_client.py", line 1810, in _ensure_session
return self.__start_session(True, causal_consistency=False)
File "C:\...\venv\lib\site-packages\pymongo\mongo_client.py", line 1763, in __start_session
server_session = self._get_server_session()
File "C:\...\venv\lib\site-packages\pymongo\mongo_client.py", line 1796, in _get_server_session
return self._topology.get_server_session()
File "C:\...\venv\lib\site-packages\pymongo\topology.py", line 482, in get_server_session
self._select_servers_loop(
File "C:\...\venv\lib\site-packages\pymongo\topology.py", line 208, in _select_servers_loop
raise ServerSelectionTimeoutError(
pymongo.errors.ServerSelectionTimeoutError: localnpipe:32775: [Errno 11001] getaddrinfo failed
Interestingly, the MongoDbContainer.get_connection_url() method returns a URL with hostname localnpipe, which I suspect the mongo client does not understand. Using pymongo directly, I can connect to the created container using a hostname of localhost.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at MongoDbContainer.get_connection_url() and reproduce the shown MongoDbContainer example on Windows 10, comparing it with the direct PyMongo connection that uses localhost. Done means the returned connection URL uses a hostname PyMongo accepts and the insert succeeds without a getaddrinfo error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- docker, mongodb, python
- Domain
- databases, testing
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100