And we got this error! MonkeyPatchWarning: Monkey-patching ssl after ssl has already been imported may lead to errors, including RecursionError on Python 3.6. It may also silently lead to incorrect behaviour on Python 3.7. Please monkey-patch earlier. See https://github.com/gevent/gevent/issues/1016. Modules that had direct imports (NOT patched): ['pymongo.ssl_support (/home/jmlefevre/.virtualenvs/datavore3/lib/python3.7/site-packages/pymongo/ssl_support.py)', 'urllib3.util (/home/jmlefevre/.virtualenvs/datavore3/lib/python3.7/site-packages/urllib3/util/__init__.py)', 'urllib3.util.ssl_ (/home/jmlefevre/.virtualenvs/datavore3/lib/python3.7/site-packages/urllib3/util/ssl_.py)']. monkey.patch_all(aggressive=aggressive) /home/jmlefevre/.virtualenvs/datavore3/lib/python3.7/site-packages/prefect/utilities/logging.py129 UserWarning: Failed to write logs with error: RecursionError('maximum recursion depth exceeded while calling a Python object') warnings.warn(f"Failed to write logs with error: {exc!r}")

This happens when a monkey patch after urllib import

One idea: You could put the code that you want to use gevent in a python file and execute it with a

ShellTask

instead -- that way it's isolated from prefect's runtime.

After a tons of tests, we are still not able to run prefect with gevent

Even shell mode need to have monkey_patch() before importing urllib

When we modify the agent to use monkey patch before importing urllib, it work ... But this is not suitable for production imho