ssl.SSLError: [SYS] unknown error (_ssl.c:2580) in test_tls_comm_closed_implicit

[fjetter]

We have a test failing on us quite reliably on python3.11 and 3.12

The diff in the environment between a working and non working CI run is

61d60
<   - dask-expr=1.1.17=pyhd8ed1ab_0
99c98
<   - jedi=0.19.1=pyhd8ed1ab_0
---
>   - jedi=0.19.2=pyhff2d567_0
103c102
<   - json5=0.9.25=pyhd8ed1ab_0
---
>   - json5=0.9.28=pyhff2d567_0
210c209
<   - openssl=3.3.2=hb9d3cd8_0
---
>   - openssl=3.4.0=hb9d3cd8_0
318c317,318
<       - dask==2024.11.0+1.gf8022927
---
>       - dask==2024.11.1+1.gbfa88d2b
>       - dask-expr==1.1.18

so most likely the new version of openssl is causing this. I haven't dug into what is happening or whether this should be handled by us. Most likely this exception is not handled well by tornado (since we receive a plain SSL exception instead of a StreamClosedError)

[jacobtomlinson]

This looks related to python/cpython#127257