MixpanelException: <urlopen error EOF occurred in violation of protocol (_ssl.c:661)> about mixpanel-python

[zakj]

This sounds related to an openssl bug:

https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/965371

You can verify by using the openssl command line tool on the same machine from which you're running your application:

openssl s_client -connect api.mixpanel.com:443

If this fails with an error message like "ssl handshake failure" but succeeds if you add a -tls1 argument, you're experiencing the bug linked above. I'm afraid that's not something we can fix in this library, but it looks like there are workarounds in the comments thread (and some more on stack overflow).

If openssl without -tlsv1 succeeds for you, feel free to reopen this issue and we can dig deeper!

[mohamedrez]

This is from the support of mixpanel:

we recently deprecated TLSv1.0 and TLSv1.1 access to improve our security protocols, so please also make sure that you are using TLSv1.2 or higher.

[mohamedrez]

I was able to run it with and without the -tls1 flag and it did succeed

[tdumitrescu]

The tlsv1 deprecation does NOT affect the tracking API, only the mixpanel.com website.