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The library is not thread-safe

See original GitHub issue

   self_sign_pem_chain = await get_event_loop().run_in_executor(
 File "/usr/lib64/python3.9/concurrent/futures/thread.py", line 52, in run
   result = self.fn(*self.args, **self.kwargs)
 File "/usr/lib/python3.9/site-packages/ideco_crypto/cert.py", line 261, in get_selfgenerated_chain
   common_name = _normalize_domain(common_name, allow_underscore=allow_underscore)
 File "/usr/lib/python3.9/site-packages/ideco_crypto/cert.py", line 76, in _normalize_domain
   return prefix + idna.encode(domain, uts46=True).lower().decode('ascii')
 File "/usr/lib/python3.9/site-packages/idna/core.py", line 349, in encode
   s = uts46_remap(s, std3_rules, transitional)
 File "/usr/lib/python3.9/site-packages/idna/core.py", line 318, in uts46_remap
   from .uts46data import uts46data
ImportError: cannot import name 'uts46data' from partially initialized module 'idna.uts46data' (most likely due to a circular import) (/usr/lib/python3.9/site-packages/idna/uts46data.py)

This happens beacause uts46_remap() imports from .uts46data import uts46data inside. When this happens in two threads in parallel, it leads to error above. Really hard to trigger, but it happens sometimes.

Issue Analytics

State:
Created 2 years ago
Comments:6 (2 by maintainers)

Top GitHub Comments

2reactions

kjdcommented, Aug 31, 2022

This bug has been open a while and I am keen to fix it. Before I roll up my sleeves and do some research on the best approach, I’d invite anyone who is more familiar with an appropriate idiomatic approach to contribute a patch to resolve it. My aim would be to preserve lazy loading the UTS46 data until needed, if possible.

0reactions

kjdcommented, Sep 13, 2022

I’ve not been able to reproduce this issue, so for now I am going to close this issue. If it can be reproduced happy to reopen.

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