Gunicorn ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi' in docker
Solution 1
Installing older version of eventlet solved the problem: pip install eventlet==0.30.2
EDIT:
you can use the newer versions like this:
pip install eventlet==0.33.0 https://github.com/benoitc/gunicorn/archive/refs/heads/master.zip#egg=gunicorn==20.1.0
see: https://github.com/benoitc/gunicorn/pull/2581#issuecomment-994198667
thank you @jmunsch
Solution 2
Looks like there was a change recently to eventlet
See this PR for an example patch, and potential release version: https://github.com/benoitc/gunicorn/pull/2581
Eventlet 0.30.3+ removed wsgi.ALREADY_HANDLED breaking public API in just a patch version increase. Sorry.
Issue with ALREADY_HANDLED: eventlet/eventlet#543 Solution with WSGI_LOCAL: eventlet/eventlet#544
It's recommended to use eventlet>=0.31.0 if one uses websockets, because older versions are vulnerable to DoS attack. GHSA-9p9m-jm8w-94p2
CI failed in pylint checks on lines I didn't touch.
Mark7888
I'm a young programmer-student from Hungary :) I'm interestid in Python and Java programming.
Updated on June 14, 2022Comments
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Mark7888 almost 2 years
I had a working code running flask with gunicorn (eventlet worker) in docker. It's also working in production, but on my machine, it started doing this. I can't find anything on google about this thing. What meight be the problem?
Error: class uri 'eventlet' invalid or not found: web_1 | web_1 | [Traceback (most recent call last): web_1 | File "/root/.local/lib/python3.7/site-packages/gunicorn/util.py", line 99, in load_class web_1 | mod = importlib.import_module('.'.join(components)) web_1 | File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module web_1 | return _bootstrap._gcd_import(name[level:], package, level) web_1 | File "<frozen importlib._bootstrap>", line 1006, in _gcd_import web_1 | File "<frozen importlib._bootstrap>", line 983, in _find_and_load web_1 | File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked web_1 | File "<frozen importlib._bootstrap>", line 677, in _load_unlocked web_1 | File "<frozen importlib._bootstrap_external>", line 728, in exec_module web_1 | File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed web_1 | File "/root/.local/lib/python3.7/site-packages/gunicorn/workers/geventlet.py", line 20, in <module> web_1 | from eventlet.wsgi import ALREADY_HANDLED as EVENTLET_ALREADY_HANDLED web_1 | ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi' (/root/.local/lib/python3.7/site-packages/eventlet/wsgi.py) web_1 | ]
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jmunsch almost 3 yearsJust to note: there is a websocket DOS vulnerability in this version.
GHSA-9p9m-jm8w-94p2
the reason for the breaking change -
sqp_125 over 2 yearsHm I have docker alpine3.8 and eventlet==0.33.0, still get the Error ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi'
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jmunsch over 2 years