New submission from Nathaniel Smith <n...@pobox.com>:
I have a test case that sets up a blocking SSLSocket, and eventually calls
unwrap() to do a proper SSL shutdown.
Every once in a while, the test blows up, because unwrap() unexpectedly raises
SSLWantWriteError. This is very unexpected for a blocking socket.
Unfortunately, since this is intermittent, I don't have a reliable reproducer.
Both of the times I've seen this so far, it was on MacOS with CPython 3.6 (the
official python.org build, so whichever openssl it uses), and it was
specifically in unwrap():
https://travis-ci.org/python-trio/trio/jobs/298164123
https://travis-ci.org/python-trio/trio/jobs/311618077
Here's the code that fails -- as you can see it's just a straightforward
blocking echo server using SSLContext.wrap_socket:
https://github.com/python-trio/trio/blob/3e62bf64946b1dcbf42c2d03e39435d4b1ba00ac/trio/tests/test_ssl.py#L92
----------
assignee: christian.heimes
components: SSL
messages: 307634
nosy: alex, christian.heimes, dstufft, janssen, njs
priority: normal
severity: normal
status: open
title: SSLWantWriteError being raised by blocking SSL socket
versions: Python 3.6
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32219>
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