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ResourceWarning: unclosed SSL socket

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I get the following warning every time I create a CogniteClient:

 

ResourceWarning: unclosed <ssl.SSLSocket fd=5, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=6, laddr=('10.xx.xx.xx', 49572), raddr=('40.xx.xx.xx', 443)>

 

Is this caused by the connection handling in Cognite SDK? I’m using the following Python modules:

cognite-sdk-4.11.0

cognite-sdk-core-2.56.1

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Best answer by Håkon V. Treider 2 November 2022, 07:19

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10 replies

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Yes, the stack trace didn’t make much sense to me neither. I’ll just ignore the warning like you suggested. Thanks for your help.

H
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A bit of a weird stack trace, very short? Only file mentioned is from yaml lib, which surely can’t be the cause? From googling around, it seems completely safe to just silence this particular warning, see e.g. https://github.com/boto/boto3/issues/454#issuecomment-324782994

warnings.filterwarnings("ignore", category=ResourceWarning, message="unclosed.*<ssl.SSLSocket.*>") 

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$ python -Werror test_cdf_endpoint.py 
Exception ignored in: <ssl.SSLSocket fd=3, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=6, laddr=('10.x.x.x', 40596), raddr=('20.x.x.x', 443)>
Traceback (most recent call last):
  File "/home/user/projects/my-project/env/lib/python3.9/site-packages/yaml/scanner.py", line 286, in stale_possible_simple_keys
    for level in list(self.possible_simple_keys):
ResourceWarning: unclosed <ssl.SSLSocket fd=3, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=6, laddr=('10.x.x.x', 40596), raddr=('20.x.x.x', 443)>

 

H
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Great, can you post the stack trace please?

P
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I tried running it with  -Werror, but the only difference in output was the aforementioned ResourceWarning duplicated as an Exception.

H
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Userlevel 4
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Could you run your script like the following (converts warnings to exceptions):

>>> python -Werror my_script.py

That way we might get some more insight into exactly where the warning originates from. 

P
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There isn’t any more stacktrace than what I posted. It still works, yes.

Murad Sæter
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Can you share more of the stacktrace? Does it still work?

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I removed cognite-sdk-core, but the warning remains.

I’m running the code on my local machine at work. I assume I’m behind a company firewall, but I’m getting the same warning when I’m on my home network as well.

Murad Sæter
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Userlevel 2

Hi

I’m not sure if it solves your problem, but you should remove the “cognite-sdk-core” package. With SDK >v4 it was removed so it might cause issues to have both packages installed.

Are you running the code behind a firewall/proxy?

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